We need to calculate the z-test score. It is a statistical test for inference that tests the null hypothesis that the mean of a sample from a normal population equals a specified value, and it is a test of statistical significance. Z-score: Z = (x - μ) / (σ / √n)μ = 3000, x = (2176 + 2784) / 2 = 2480, σ is the standard error of the mean, and n is the number of data points.
Z = (2480 - 3000) / (3000 / √n). The standard error of the mean (SEM) is calculated as follows: SEM = σ / √nσ = (2784 - 2176) / (2 × 1.96) = 303.64. Therefore, SEM = σ / √n=303.64 / √n(303.64 / √n) = (3000 - 2176) / 1.96n = 141.56n = 142Z = (2480 - 3000) / (303.64 / √142)Z = -12.95.
Since Z is less than -1.96, the test is significant at the 5% level of significance. Therefore, we can refuse the null hypothesis, and the alternative hypothesis is accepted. Therefore, the data support the alternate hypothesis that the number of burglaries per month is not equal to 3000.
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Really appreciated :) 25 points
Answer:
a. 9
b. 4
c. 4/9
Step-by-step explanation:
a. If we are picking 1 card out of 9, then there are 9 possible outcomes:
1, 2, 3, 4, 5, 6, 7, 8, or 9
This can also be represented as 9 choose 1 ([tex]_9C_1[/tex]).
b. We have to identify the number of prime numbers in the set:
2, 3, 5, 7
↑ 4 numbers
Note: Prime numbers can only be divided by themselves and 1 to result in a whole number.
c. We can represent the probability of selecting a prime number by dividing the number of prime numbers by the total number of numbers.
# of primes / # of numbers = 4 / 9
Matt wants to buy a tie. The prices of similar ties offered by four different online retailers are listed. $15.50, $17.50, $16.00, $18.00 What is the mean absolute deviation of the prices of the ties?
Answer: mean-16.75
population size- 4
Step-by-step explanation:
Can someone help me?!??
Answer:
4,320
Step-by-step explanation:
answer is 4,320
9x2x3x8x2x5
Answer:
66 km²
Step-by-step explanation:
To solve this, you should find the area of the rectangle as if it were complete and then subtract the area of the missing section.
Step one: Finding the area of the big rectangle
A = length x width
A = 9 x 8
A = 72 km²
Step two: Find the area of the smaller rectangle
A = 2 x 3 = 6 km²
Step three: Subtract the area of the small rectangle from the area of the big rectangle
72 - 6 = 66
BRAINLIST! HELP ME PLS
SHOW HOW U GOT IT AND SHOW ALL STEPS! IF CORRECT WILL MAKE U BRAINLIST!
Answer: 948 [tex]ft^{2}[/tex]
Step-by-step explanation:
2(18*20) + 2(18*3) + 2(20*3) = 2(360) + 2(54) + 2(60) = 720 + 108 + 120 = 948
if the cost for your car repair is in the lower of automobile repair charges, what is your cost (to two decimals)?
The cost of your car repair will depend on the type of repair being performed, as well as the cost of the necessary parts and labour. To find out the exact cost, you will need to consult a qualified mechanic.
Assuming that the cost of your repair is in the lower range of automobile repair charges, you can calculate the cost by multiplying the cost of the parts and the cost of the labour together. You can then round the result to two decimal places. For example, if the cost of the parts is $100 and the cost of the labour is $200, the total cost of the repair will be $300. This can be rounded to two decimal places, giving you a cost of $300.00.\
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Pls help Which statement about the function y=x2−4x−12
is true?
Responses
The expression x2−4x−12
has factors (x−6)
and (x+2)
, and the function has zeros at x=−6
and x=2
.
The expression x 2 − − 4 x − − 12 has factors ( x − − 6 ) and ( x + 2 ) , and the function has zeros at x = − − 6 and x = 2 .
The expression x2−4x−12
has factors (x−6)
and (x+2)
, and the function has zeros at x=−2
and x=6
.
The expression x 2 − − 4 x − − 12 has factors ( x − − 6 ) and ( x + 2 ) , and the function has zeros at x = − − 2 and x = 6 .
The expression x2−4x−12
has factors (x−2)
and (x+6)
, and the function has zeros at x=−6
and x=2
.
The expression x 2 − − 4 x − − 12 has factors ( x − − 2 ) and ( x + 6 ) , and the function has zeros at x = − − 6 and x = 2 .
The expression x2−4x−12
has factors (x−2)
and (x+6)
, and the function has zeros at x=−2
and x=6
.
The expression x 2 − − 4 x − − 12 has factors ( x − − 2 ) and ( x + 6 ) , and the function has zeros at x = − − 2 and x = 6 .
Answer:
Step-by-step explanation:
The expression x2−4x−12 has factors (x-6) and (x+2), and the function has zeros at x=-2 and x=6.
Therefore, the correct statement is: "The expression x2−4x−12 has factors (x-6) and (x+2), and the function has zeros at x=-2 and x=6."
DUE FRIDAY WELL WRITTEN ANSWERS ONLY!!!!!!!!!!!
Complete the table
All the trigonometric values for sin θ, cos θ and tan θ are valued below. Each trigonometric value is mentioned.
sin θ has boundaries from 0 to 1.
sin [tex]-\pi /2[/tex] = -1
sin [tex]-\pi /3[/tex] = -0.87
sin [tex]-\pi /6[/tex] = -0.5
sin 0 = 0
sin [tex]\pi /6 \\[/tex] = 0.5
sin [tex]\pi /3[/tex] = 0.87
sin [tex]\pi /2[/tex] = 1
sin [tex]2\pi /3[/tex] = [tex]\sqrt{3}/2[/tex]
sin [tex]5\pi /6[/tex] = 1/2
sin [tex]\pi[/tex] = 1
sin [tex]7\pi /6[/tex] = -0.5
sin [tex]4\pi /3[/tex] = -0.87
sin [tex]3\pi /2[/tex] = -1
sin [tex]5\pi /3[/tex] = -0.87
sin [tex]11\pi /6[/tex] = -0.5
sin [tex]2\pi[/tex] = 0
Similarly cos θ has boundaries.
cos [tex]-\pi /2[/tex] = 0
cos [tex]-\pi /3[/tex] = 0.5
cos [tex]-\pi /6[/tex] = 0.87
cos 0 = 1
cos [tex]\pi /6 \\[/tex] = 0.87
cos [tex]\pi /3[/tex] = 0.5
cos [tex]\pi /2[/tex] = 0
cos [tex]2\pi /3[/tex] = -0.5
cos [tex]5\pi /6[/tex] = -0.87
cos [tex]\pi[/tex] = -1
cos [tex]7\pi /6[/tex] = -0.87
cos [tex]4\pi /3[/tex] = -0.5
cos [tex]3\pi /2[/tex] = 0
cos [tex]5\pi /3[/tex] = 0.5
cos [tex]11\pi /6[/tex] = 0.87
cos [tex]2\pi[/tex] = 1
But tan θ has no boundaries.
tan [tex]-\pi /2[/tex] = undefined
tan[tex]-\pi /3[/tex] = -0.8
tan [tex]-\pi /6[/tex] = -1.73
tan 0 = 0
tan[tex]\pi /6 \\[/tex] = [tex]\frac{1}{\sqrt{3} }[/tex]
tan [tex]\pi /3[/tex] = [tex]\sqrt{3}[/tex]
tan [tex]\pi /2[/tex] = undefined
tan [tex]2\pi /3[/tex] = -3
tan [tex]5\pi /6[/tex] = -0.5774
tan [tex]\pi[/tex] = undefined
tan [tex]7\pi /6[/tex] = -1.73
tan[tex]4\pi /3[/tex] = 1.73
tan [tex]3\pi /2[/tex] = undefined
tan [tex]5\pi /3[/tex] = -1.73
tan [tex]11\pi /6[/tex] = -0.58
tan [tex]2\pi[/tex] = 0
Hence, all the values mentioned in the table, were written above.
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what is 7x=14 show your work
Answer:
x=2
Step-by-step explanation:
7x=14
divide by 7 on each side to get x by itself
x=14/7
x=2
an ai that plays the game of go has a 90\% chance of winning each game it plays against a human grandmaster. what is the binomial probability of the human beating the ai 1 out of 3 games?
The probability of the human Grandmaster winning one out of three games against the AI is approximately 0.243 or 24.3%.
Let's denote the probability of the human Grandmaster winning one game as p. Then the probability of the AI winning one game is 0.9, which means the probability of the human winning one game is 0.1. Since we want to calculate the probability of the human winning one game out of three, we can use the binomial distribution formula:
[tex]P(X=k) = (^n _k) \times p^k \times (1-p)^{(n-k)}[/tex]
Where:
P(X=k) is the probability of getting k successes in n trials
(n choose k) is the binomial coefficient, which is the number of ways to choose k successes from n trials
p is the probability of success in one trial
(1-p) is the probability of failure in one trial
k is the number of successes we are interested in (in this case, k=1)
n is the total number of trials (in this case, n=3)
Plugging in the values, we get:
P(X=1) = (3 choose 1) * 0.1^1 * 0.9^(3-1) = 3 * 0.1 * 0.81 = 0.243 or 24.3%
This means that there is a decent chance for the human to win at least one game, but it is still more likely for the AI to win all three games.
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for an astm grain size of 8, approximately how many grains would there be per square inch at a magnification of 100? without any magnification?
An ASTM grain size of 8 means that there are 8 grains per square inch at a magnification of 100. Without any magnification, it is not possible to determine the number of grains per square inch.
ASTM grain size is a measure of the size of the grains in a metal sample. The ASTM E112 defines the grain size number as the number of grains per square inch of metal surface area at a magnification of 100 times. So, an ASTM grain size of 8 means that there are 8 grains per square inch at a magnification of 100.
Without any magnification, it is not possible to determine the number of grains per square inch as the grains are too small to be visible to the eye. However, the ASTM grain size number can still provide information about the grain size distribution in the metal sample.
A metal sample with a smaller grain size number (i.e., larger grain size) will have fewer grains per square inch at a magnification of 100 than a metal sample with a larger grain size number (i.e., smaller grain size). This is because larger grains take up more surface area than smaller grains, resulting in fewer grains per unit area.
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If h = 13 units and r = 6 units, then what is the volume of the cone shown above?
The vοlume οf the cοne is 156π cubic units
What is cοne?A cοne is a three-dimensiοnal geοmetric fοrm with a flat base and a smοοth tapering tip οr end. A cοne is made up οf a cοllectiοn οf line segments, half-lines, οr lines that link the apex—the cοmmοn pοint—tο every pοint οn a base that is in a plane οther than the apex.
Given,
h = 13 units and r = 6 units
We knοw the fοrmula tο determine vοlume οf cοne; that is
(1/3)πr²h
Where r= radius οf the cοne
h= height οf the cοne
We put the value οf h and r in the fοrmula
(1/3)πr²h
= (1/3)π6² *13
=156π cubic units
The vοlume οf the cοne is 156π cubic units
Hence the cοrrect answer is 156π cubic units
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solve these questions
Answer:
a) The perimeter of a rectangle is given by the formula:
P = 2L + 2W
where P is the perimeter, L is the length, and W is the width. We are given that the width of the rectangle is 2x and the length is three times the width. So we can set up an equation that represents the given information:
P = 2L + 2W
168 = 2(3W) + 2W
168 = 8W
b) To solve for W, we can divide both sides of the equation by 8:
168/8 = W
21 = W
Therefore, the width of the rectangle is 21cm.
c) To find the length of the rectangle, we can use the expression that represents the length in terms of the width:
L = 3W
L = 3(21)
L = 63
Therefore, the length of the rectangle is 63cm.
The width and length of the rectangle are 21cm and 63cm, respectively.
. a student is calculating the surface area of a single sheet of paper. he measures the length to be he measures the width to be the student should record the area of the paper as (a) 602.64 cm2 . (b) 602.6 cm2 . (c) 602 cm2 . (d) 603 cm2 .
The student should record the area of the paper as option (c) 602 cm^2
The student measured the length and width of a single sheet of paper and was asked to calculate its surface area. The surface area of the paper is the product of its length and width, which can be calculated by multiplying the two measurements together.
The surface area of the paper can be calculated as the product of the length and the width
Surface area = length × width
Substituting the given measurements, we get
Surface area = 43 cm × 14 cm
Surface area = 602 cm^2
Therefore, the correct option is (c) 602 cm^2
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The given question is incomplete, the complete question is;
A student is calculating the surface area of a single sheet of paper. he measures the length to be 43 cm he measures the width to be 14cm the student should record the area of the paper as (a) 602.64 cm^2 . (b) 602.6 cm^2 . (c) 602 cm^2 . (d) 603 cm^2 .
Mark sold half his video game collection to his brother and then bought 16 more games at a yard sale. He now has 36 games. How many did he start with?
Answer:
Step-by-step explanation:
Let's start by using algebra to solve the problem.
Let x be the number of games that Mark started with.
Mark sold half of his games to his brother, so he sold x/2 games. This means he had x - x/2 = x/2 games after selling half to his brother.
He then bought 16 more games, so he had x/2 + 16 games.
Finally, we're told he now has 36 games, so we can set up the equation:
x/2 + 16 = 36
Simplifying the equation, we get:
x/2 = 20
Multiplying both sides by 2, we get:
x = 40
Therefore, Mark started with 40 games.
Answer:
Mark had 40 games to start with.
Step-by-step explanation:
You know this because you can take away the 16 games he bought, which leaves him with half of what he started with which is 20. And if 20 is half of his games you can double it to give you his starting number of games.
:)
what topics will be covered in this unit? logarithmic functions quadratic functions linear functions matrices exponential functions
The unit will cover linear functions, quadratic functions, exponential functions, logarithmic functions, and matrices.
We have,
Based on the topics, the unit will cover the following topics:
Linear functions: This topic typically includes concepts such as slope, intercepts, equations of lines, and graphing linear functions.
Quadratic functions: This topic covers quadratic equations, factoring, completing the square, quadratic formula, vertex form, and graphing parabolas.
Exponential functions: This topic involves exponential equations, growth and decay, properties of exponential functions, and their graphs.
Logarithmic functions: This topic focuses on logarithmic equations, properties of logarithms, solving logarithmic equations, and the relationship between exponential and logarithmic functions.
Matrices: Matrices are a topic in linear algebra and involve operations on matrices, matrix multiplication, determinants, inverse matrices, and solving systems of linear equations using matrices.
It's important to note that the exact content and depth of each topic may vary depending on the specific curriculum or course.
However, the mentioned topics generally form the core concepts of a unit covering functions, algebra, and matrices.
Thus,
The unit will cover linear functions, quadratic functions, exponential functions, logarithmic functions, and matrices.
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I just need help with this, please! 10 points!
The given data comprises of a right triangle in which the base is denoted by x whose value is found to be 10.01.
Define trigonometric identity of sine?It states that the ratio of the length of the side opposite to the angle to the length of the hypotenuse is equal to the sine of the angle.
The given data comprises of a right triangle in which the base is denoted by x and the perpendicular is 8. The angle formed between the base and hypotenuse is 53 degree.
To solve this problem, we can use the trigonometric identity of sine.
Mathematically, it can be expressed as:
sin 53° = Perpendicular/Hypotenuse
8/x = sin 53°
x = 8/sin 53°
x = 8/ 0.7986
x ≈ 10.01
Hence, the value of x is 10.01.
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you have 8 red roses and 4 yellow rose. if you line them up in a row, how many different arrangements can you get
There are 27,720 different arrangements of red and yellow roses.
The total number of roses is 8 + 4 = 12. To find the number of different arrangements, we can use the formula for permutations, which is:
n! / (n - r)!
where n is the total number of objects and r is the number of objects we want to arrange.
In this case, we want to arrange all 12 roses, so n = 12. The number of red roses is 8, so r = 8. Therefore, the number of different arrangements of the roses is:
12! / (12 - 8)! = 12! / 4! = 27,720
So there are 27,720 different arrangements of the 8 red roses and 4 yellow roses.
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please help mee I need it
7 is the value of mixed fraction.
What exactly is a mixed fraction?
A mixed fraction is one that is represented by both its remainder and quotient. Two is the quotient and one is the remainder in the mixed fraction 2/3, for instance. Hence, a mixed fraction is created by combining a whole number and a proper fraction. A mixed number is one that includes both a whole number and a legal fraction.
= 6 30/44
= 294/44
= 6.6818
= 7 ( round off )
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how many ways can patricia choose 4 pizza toppings from a menu of 19 toppings if each topping can only be chosen once?
There are 3876 ways in which Patricia can choose 4 pizza toppings from a menu of 19 toppings if each topping can only be chosen once. In permutation, the order is very important, and it is denoted by "P." which means that each item can only appear once in the lineup, and there are no duplicates. The formula for permutation is given as: P(n, r) = n!/(n-r)!
What is combination?In a combination, the order is not essential, and it is denoted by "C." It means that things can be jumbled up, and there are no duplicates. The formula for a combination is given as: C(n, r) = n! / (r! * (n-r)!)How to calculate the number of ways to choose 4 pizza toppings from a menu of 19 toppings?
To calculate the number of ways to choose 4 pizza toppings from a menu of 19 toppings, we need to use the combination formula, which is: C(n, r) = n! / (r! * (n-r)!)Here, n = 19 and r = 4, so the formula becomes: C(19,4) = 19!/(4!(19-4)!) = 19!/(4!15!) = (19*18*17*16)/(4*3*2*1) = 38,76. Therefore, there are 3876 ways in which Patricia can choose 4 pizza toppings from a menu of 19 toppings if each topping can only be chosen once.
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why does the gcf of the variables of a polynomial have the least exponent of any variable term in the polynomial brainly
The GCF (Greatest Common Factor) of the variables of a polynomial has the least exponent of any variable term in the polynomial because it represents the largest factor that is common to all the terms in the polynomial.
To understand this better, consider a polynomial like 6x²y³ + 9x³y². The GCF of this polynomial would be 3x²y², which is the largest factor that can divide both terms evenly.
Notice that the exponent of each variable in the GCF is the smallest exponent among the corresponding variable terms in the polynomial.
This is because any factor that is common to all terms in the polynomial must be able to divide each term without leaving a remainder. Therefore, the exponent of each variable in the GCF must be less than or equal to the exponent of that variable in every term of the polynomial.
In summary, the GCF of the variables of a polynomial has the least exponent of any variable term in the polynomial because it represents the largest factor that can divide all terms in the polynomial evenly, and therefore, it must have the smallest exponent of each variable among all terms in the polynomial.
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What is the area of a circle with the radius of 11.5 meters? Use 3.14 for pi or put pi in your answer for an exact answer.
Answer:
Area = [tex]415.265 m^2[/tex]
Step-by-step explanation:
Area of a circle = [tex]\pi r^2[/tex]
[tex]A = (3.14)(11.5^2)=(3.14)(132.25)=415.265[/tex]
A math teacher gives her class the following problem.
Barry is selling magazine subscriptions for a school fundraiser. He has already sold 15 subscriptions. He plans to sell 3 subscriptions per week until he reaches a total of 30 subscriptions sold. How many weeks will it take Barry to achieve his goal.
One student in the class solves the problem arithmetically as shown below.
The linear expression that could be used to find the number of weeks until he reaches 30 subscriptions is given as follows:
A. 15 + 3x = 30.
How to define a linear function?The slope-intercept representation of a linear function is given by the equation presented as follows:
y = mx + b
The coefficients of the function and their meaning are described as follows:
m is the slope of the function, representing the rate of change.b is the y-intercept of the function, which is the initial value.The parameters for this problem are given as follows:
m = 3, as each week, 3 subscriptions are sold.b = 15, which is the initial number of subscriptions.Hence the number of subscriptions after x weeks is given as follows:
y = 3x + 15.
The number of weeks to reach 30 subscriptions (y = 30) is given as follows:
3x + 15 = 30.
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let x be the charge for an oil change, and let the tax on x be 7% so that the actual charge is 1.07x. let y be the number of containers of oil that are needed, and $2 the price per container. then 2y is the price of the oil itself. the cov(x,y) is 5.6. what is the the cov(1.07x, 2y)? select one:a. 11. 984b. 0.3821c. 2.616d. 7.982
let x be the charge for an oil change, and let the tax on x be 7% so that the actual charge is 1.07x. let y be the number of containers of oil that are needed, and $2 the price per container. then 2y is the price of the oil itself. the cov(x,y) is 5.6.
The covariance of 1.07x and 2y is 11.984
What is covariance?
Covariance refers to the way two variables shift together. It is a measurement that evaluates how close two variables are to one another. It examines whether they change in the same direction (positive covariance) or in the opposite direction (negative covariance)
.Calculating Covariance:
Given that Cov(X,Y) = 5.6
we need to find Cov(1.07X,2Y)Hence,
Cov(1.07X,2Y) = 2 * 1.07 * Cov(X,Y) = 2.2996 * 5.6 = 11.984
Therefore, the covariance of 1.07x and 2y is 11.984.
Hence option (a) is the correct answer.
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a)Find the number c that satisfies the conclusion of the Mean Value Theorem for this function f(x) = x + 3/x and the interval [1,14]
The number c that satisfies the conclusion of the Mean Value Theorem for the function f(x) = x + 3/x on the interval [1, 14] is approximately c = 3.75.
To find the number c that satisfies the conclusion of the Mean Value Theorem for the function f(x) = x + 3/x on the interval [1, 14], follow these steps:
1. Verify the conditions of the Mean Value Theorem:
The function f(x) = x + 3/x is continuous on the closed interval [1, 14] and differentiable on the open interval (1, 14).
2. Calculate the average rate of change of the function on the interval:
f(14) = 14 + 3/14 ≈ 14.214
f(1) = 1 + 3/1 = 4
Average rate of change = (f(14) - f(1)) / (14 - 1) ≈ (14.214 - 4) / 13 ≈ 0.786
3. Differentiate the function to find the instantaneous rate of change:
f'(x) = 1 - 3/x²
4. Set f'(x) equal to the average rate of change and solve for x:
1 - 3/x² = 0.786
x² = 3 / (1 - 0.786)
x² ≈ 14.056
x ≈ √14.056 ≈ 3.75
The number c that satisfies the conclusion of the Mean Value Theorem for the function f(x) = x + 3/x on the interval [1, 14] is approximately c = 3.75.
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Lin's job pays $12.50 an hour. She also gets paid $25 per week to cover uniform cleaning and
other expenses. To meet her budget, Lin needs to be paid at least $300 per week.
Answer:
I think it is because 3,500
Penny Banks purchased a new washer and dryer for $1,526.39. She used the store's credit plan and made a 25% down payment. How much did she finance?
Penny Banks made a 25% down payment, which means she paid 75% of the total cost through financing.
The amount she paid as a down payment is:
25% of $1,526.39 = 0.25 x $1,526.39 = $381.60
So the amount she financed is:
$1,526.39 - $381.60 = $1,144.79
Therefore, Penny Banks financed $1,144.79.
Simplify 4 x + 3 y 2 − 7 z 4 + 5 z 4 + 11 − 4 x + y 2
Answer:
[tex]4y {}^{2} - 2z {}^{4} + 11[/tex]
Step-by-step explanation:
[tex]1. \: (4x - 4x) + (3y {}^{2} + y {}^{2} ) + ( - 7z {}^{4} + 5z {}^{4} ) + 11 \\ 2. \: 4y {}^{2} - 2z {}^{4} + 11[/tex]
This is due tomorrow so please help me ASAP! Thanks!
The value of the given lengths are as follows:
a.) KL = 11.1ft
LO = 5.7ft
b.) m<OMN = 45°
How to calculate the missing length of the given triangles?For Side LO ;
7/11 = 7√2/7√2+LO
7(7√2+LO) = 11×7√3
69.3+7LO = 108.9
7LO = 108.9-69.3
LO = 39.6/7
LO = 5.7 ft
For KL ;
This can be solved using the Pythagorean theorem;
c²= b²+a²
C = 5.7+7√2 = 15.6
b = 11
a²= 15.6²-11²
= 243.36 - 121
= 122.36
a= √122.36
a= 11.1ft
For angle OMN;
This can be solved using SOHCAHTOA.
Sin∅ = opposite/hypotenuse
opposite = 7
hypotenuse = 7√2
sin∅ = 7/7√2
sin∅ = 0.707106781
∅= sin-1 0.707106781
∅ = 45°
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James invested 20,000 for one year and earned 1470 interest. If part of the money is invested at 10% and the remainder is invested at 6% how much is the invested at each rate
Linear equation.
Answer:
Let's represent the amount invested at 10% as x and the amount invested at 6% as y. Then we can set up a system of two equations to represent the given information:
x + y = 20,000 (since the total amount invested is 20,000)
0.10x + 0.06y = 1,470 (since the interest earned is 1,470 and the interest rate at which x is invested is 10% and the interest rate at which y is invested is 6%)
We can use the first equation to solve for one of the variables in terms of the other:
x = 20,000 - y
Now we can substitute this expression for x into the second equation and solve for y:
0.10(20,000 - y) + 0.06y = 1,470
2,000 - 0.10y + 0.06y = 1,470
-0.04y = -530
y = 13,250
So $13,250 was invested at 6%. We can find the amount invested at 10% by plugging in this value of y into the first equation:
x + 13,250 = 20,000
x = 6,750
So $6,750 was invested at 10%.
9. a soccer field is a rectangle 90 meters wide and 120 meters long. the coach asks players to run from one corner to the other corner diagonally across. what is this distance? round your answer to the nearest tenth. (4 points)
The distance from one corner to the other corner diagonally across the soccer field is 169.7 meters.
To calculate this, use the Pythagorean theorem, which states that [tex]a^2 + b^2 = c^2[/tex], where a and b are the two sides of a right triangle, and c is the hypotenuse, or the longest side.
In this problem, a is 90 meters, b is 120 meters, and c is the distance from one corner to the other diagonally across the field.
So, [tex]90^2 + 120^2 = c^2[/tex]. To solve this, take the square root of both sides, and c = 169.7 meters.
To round this answer to the nearest tenth, we need to round it to 169.7 meters.
This question can be used to demonstrate the importance of knowing the Pythagorean theorem, which can be used to calculate the distance of a right triangle when the lengths of two sides are known. It is a useful tool to solve a variety of geometry problems.
See more about Pythagorean theorem at: https://brainly.com/question/29290893
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