A baseball rolls off a 0.7m high desk and strikes the floor 0.25m away from the base of the desk. How long will it take for the ball to hit the ground?

The answer to the all questions was solved by the methods of factoring:

Factoring is the process of breaking down a mathematical expression or equation into simpler components, such as factors that when multiplied together give the original expression.

In the given questions,

1.Factoring 2x² + 9x + 18:

2.Factoring x² - 20x + 36:

3.Factoring 2x² - 5x - 3:

4.Finding the greatest common factor of 8x² + 18x + 4:

5.Factoring 8x² + 18x + 4:

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Answer:

To find the surface area of a square pyramid, you need to find the area of the base and the area of the four triangular faces, and then add them together.

First, let's find the length of one side of the base of the pyramid:

Perimeter of the square base = 4 x side length

48 inches = 4 x side length

Side length = 12 inches

Now we can find the area of the base:

Area of the base = side length squared

Area of the base = 12 inches x 12 inches

Area of the base = 144 square inches

Next, we need to find the area of each triangular face. To do this, we need to find the length of the slant height of the pyramid. We can use the Pythagorean theorem to do this:

Slant height squared = height squared + (1/2 base length) squared

Slant height squared = 8 inches squared + (6 inches) squared

Slant height squared = 64 inches squared + 36 inches squared

Slant height = square root of (64 + 36) inches

Slant height = 10 inches

Now we can find the area of each triangular face:

Area of a triangular face = (1/2 base length) x slant height

Area of a triangular face = (1/2 x 12 inches) x 10 inches

Area of a triangular face = 60 square inches

Finally, we can add the area of the base and the area of the four triangular faces together to find the total surface area of the pyramid:

Total surface area = Area of the base + (4 x Area of a triangular face)

Total surface area = 144 square inches + (4 x 60 square inches)

Total surface area = 384 square inches

Therefore, the surface area of the pyramid is 384 square inches.

Answer:2

Step-by-step explanation:Because the 2 is closest to the middle line

Answer:

relationship describes angles 1 and 2 is supplementary angles. From the given figure

it is concluded that

the relation ship between angle 1 and 2 is supplementary angles

because its is  linear pair

and forms a line

therefore , the angles are supplementary angles

hence , relationship describes angles 1 and 2 is supplementary angle

Step-by-step explanation: Hope this helps !! Mark me brainliest!! :))

Answer:

0 (-72522)

Step-by-step explanation:

ahora tienes negativo manzanas

In the above proportions problem, note that the distance of PR is 155.17ft.

To solve for PR, note that

OC/RE = PR/OR

That is:

225/145 = PR/100

To solve for PR, we can cross-multiply the fractions:

225 * 100 = 145 * PR

22,500 = 145PR

Dividing both sides by 145:

PR = 155.17

Therefore, PR is approximately 155.17ft

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1) y = -3x and y = -3x + 2: inconsistent system of equations.

2) y = x - 5 and -2x + 2y = - 10: consistent and independent.

3) 2x - 5y = 10 and 3x + y = 15 : consistent and independent.

The given equation are:

The graph for each system of equations is plotted.

1) y = -3x and y = -3x + 2

From the graph 1 it is shown that the lines for the each equation form the parallel lines.

Thus, system of equations are inconsistent.

2) y = x - 5 and -2x + 2y = - 10

From the graph 2 it is shown that the lines for the each equation form the coincident lines.

Thus, system of equations are consistent and independent.

3) 2x - 5y = 10 and 3x + y = 15

From the graph 2 it is shown that the lines for the each equation form the coincident lines.

Thus, system of equations are consistent and independent.

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the point that would not be found on the line is option A, (-7,19).

How to calculate the line?

We can use the equation of the line that passes through these three points to determine which of the given points would not be on the line.

First, we can find the slope of the line using the first two points:

slope = (y₂ - y₁)/(x₂- x₁) = (4 - 9)/(-1 - (-3)) = 5/2

Now, we can use the point-slope form of the equation of a line with the slope we just found and the first point (-3,9):

y - y₁= m(x - x₁)

y - 9 = (5/2)(x + 3)

Simplifying this equation gives us:

y = (5/2)x + (27/2)

We can check that the third point (1,-1) also lies on this line by plugging in the values of x and y into the equation above.

Now, we can check which of the given points would not be on this line by plugging in the values of x and y into the equation above.

A. (-7,19): y = (5/2)(-7) + (27/2) = 5.5, which does not equal 19, so this point is not on the line.

B. (7,-16): y = (5/2)(7) + (27/2) = 22.5, which does not equal -16, so this point is not on the line.

C. (-8,20.5): y = (5/2)(-8) + (27/2) = 4.5, which does not equal 20.5, so this point is not on the line.

D. (8,-18.5): y = (5/2)(8) + (27/2) = 25.5, which does not equal -18.5, so this point is not on the line.

Therefore, the point that would not be found on the line is option A, (-7,19).

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The solutions to the quadratic equations are as follows

4a. The rocket was launched from an initial height of 10 meters.

b. The maximum height of the rocket was 55 meters.

c. The rocket reaches its maximum height at 3 seconds

d. the rocket is in the air for t = 6.316 seconds

5. when the horizontal distance is 1 foot, the height of the balloon is 8.875 feet

b. when the horizontal distance is 33 feet, the height of the balloon is 0.875 feet.

The function is a quadratic equation, and here is how we solve each problem;

a. The initial height of the rocket is the value of h when t=0. So we substitute t=0 into the equation to find:

h = -5(0)² + 30(0) + 10 = 10 meters

b. & c. The maximum height of a projectile launched upward occurs at the vertex of the parabola represented by the quadratic function. For a quadratic function in the form y = ax² + bx + c, the time at which the maximum (or minimum) occurs is -b/2a. In this case, a = -5 and b = 30. So:

t = -b/2a = -30 / (2×-5) = 3 seconds

So, the rocket reaches its maximum height at t=3 seconds. We can find this maximum height by substituting t=3 into the equation:

h = -5(3)² + 30(3) + 10 = -5×9 + 90 + 10 = 45 meters

The rocket is in the air from the time it was launched until it hits the ground. The time when it hits the ground is when h = 0. So we can set the equation to 0 and solve for t:

0 = -5t² + 30t + 10

This is a quadratic equation and can be solved using the quadratic formula: t = [-b ± √(b² - 4ac)] / (2a)

Let's calculate the roots:

t = [-30 ± √((30)² - 4×-5×10)] / (2×-5)

= [-30 ± √(900 + 200)] / -10

= [-30 ± √(1100)] / -10

= 6.316 or -0.32

5. a. To find the height of the balloon when d=1, we substitute d=1 into the equation:

h = -1/8(1)²+ 4(1) + 5 = -1/8 + 4 + 5 = 8.875 feet

b. To determine whether the balloon hits your enemy, we need to see if the balloon's height (h) is above ground level (h > 0) when d=33. So, we substitute d=33 into the equation:

h = -1/8(33)² + 4(33) + 5

h = -1/8×1089 + 132 + 5

h = -136.125 + 132 + 5

h = 0.875 feet

when the horizontal distance is 33 feet, the height of the balloon is 0.875 feet. This means the balloon is above ground level and therefore would indeed hit your nemesis standing 33 feet away.

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The simplification of the polynomial using factor by substitution is: ((3y - 2)⁴ - 1)/(3y - 2)²

Factoring polynomials simply means separating a polynomial into its component polynomials.

Sometimes, in the event that polynomials are particularly complicated, it is usually easiest to substitute a simple term and factor down.

We have the equation:

(3y - 2)² - (3y - 2)⁻²

Let 3y - 2 be denoted by S and as such we have:

S² - S⁻²

= S² - 1/S²

Using the denominator as factor, we have:

= (S⁴ - 1)/S²

Plugging 3y - 2 for S gives us:

((3y - 2)⁴ - 1)/(3y - 2)²

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Answer:

Step-by-step explanation:

The surface area of a sphere is given by the formula:

S = 4πr^2

where S is the surface area and r is the radius of the sphere.

We are given that the surface area of the sphere is 60 square feet. Using the formula above, we can solve for the radius:

60 = 4πr^2

Dividing both sides by 4π, we get:

15/π = r^2

Taking the square root of both sides, we get:

r = sqrt(15/π)

Using 3.14 as an approximation for π, we can evaluate this expression:

r ≈ sqrt(15/3.14)

r ≈ 2.20

Therefore, the best approximation for the radius of the sphere is 2.20 feet.

Answer:

Radius is 2.18

Step-by-step explanation:

;)

Answer:Convert from English to metric.

a. 1 foot = 304.8 millimeters

b. 40 lb-ft = 54.24 Newton/meters

Convert from metric to English.

a. 30 lb = 13.61 kilograms

b. 90.8 qt = 96.25 liters

26 m = 26,000,000 µm (micrometer)

60,000 cm = 600 m

8.275 L = 0.008275 kL

0.00349 km = 349 cm

Name the metric system unit that measures each of the following:

a. Light intensity - Candela

b. Mass - Gram

c. Pressure - Pascal

d. Electric current - Ampere

e. Distance - Meter

1,200 Ω = 1.2 kΩ (kilohm)

120 kΩ = 120,000 Ω (ohm)

3,500,000 Ω = 3.5 MΩ

6.03 MΩ = 6,030,000 Ω

0.000355 A = 355 µA (microampere)

0.000355 A = 0.355 mA (milliampere)

863 mV = 0.863 V (volt)

657 Ω = 0.657 kΩ (kilohm)

35 µA = 0.000035 A (ampere)

2.2 kΩ = 2200 Ω

500 kV = 500,000 MV (megavolt)

7,500,000 µA = 7.5 A (ampere)

What’s 30 percent of 150? = 45

What’s 25 percent of 2,300? = 575

Historically, the _______ was used as the basis for all measurements. = Human body

The number below the line in a fraction indicating the number of equal parts into which the unit is divided is the _______. = Denominator

In the English system, _______ is the traditional unit of pressure. = PSI (pounds per square inch)

The metric system is based on powers of _______. = 10

What unit is used for time in the metric system? = Second

20°C equals _______°F. = 68°F

45°F equals _______°C. = 7.2°C

The basic volume unit in the English measuring system is the _______. = Gallon

One ounce equals approximately _______ grams. = 28.35 grams

1) the correct check register balance is $166.90.

2)
a) After 3 months, balance = $510.08

b) after 6 months, balance, = $520.40

c) After 9 months , balance = $531.07

d) After 1 year, balance = $542.50

3)
the interest earned in year 1 is $80,

the total balance at the end of year 1 is $1080,

the interest earned in year 2 is $86.40,

the total balance at the end of year 2 is $1166.40, and t

he interest earned in year 3 is $93.31, and

the total balance at the end of year 3 is $1259.71.

4)
the interest earned by the $100 savings account is $28, and the total balance at the end of 4 years is $128.
The interest earned by the $500 savings account is $120, and the total balance at the end of 3 years is $620.
The interest earned by the $300 savings account is $90, and the total balance at the end of 5 years is $390.

A check register balance is the amount of money in a bank account, as recorded by the account holder in their check register, after accounting for deposits, withdrawals, and fees.

1)

The check register balance is not correct. To find the correct balance, we need to adjust the statement ending balance for the outstanding deposits, subtract the outstanding check and service charge, and add any other transactions that may have been missed.

Adjusted balance for outstanding deposits: $41.27 + $27.70 + $12.30 + $102.43 = $183.70

Adjusted balance for outstanding deposits minus the outstanding check: $183.70 - $10.98 = $172.72

Adjusted balance for outstanding deposits minus the outstanding check minus the service charge: $172.72 - $5.82 = $166.90

Therefore, the correct check register balance is $166.90.

2)
To find the balance of the savings account after various time periods, we can use the formula for compound interest:

A = P(1 + r/n)^(nt)

Where:

A = the balance after time t

P = the principal (initial deposit)

r = the annual interest rate (as a decimal)

n = the number of times the interest is compounded per year

t = the time period (in years)

For this problem, we have:

P = $500

r = 0.04

n = 4 (compounded quarterly)

t = 0.25 (3 months), 0.5 (6 months), 0.75 (9 months), 1 (1 year)

After 3 months:

A = $500(1 + 0.04/4)^(4*0.25) = $510.08

After 6 months:

A = $500(1 + 0.04/4)^(4*0.5) = $520.40

After 9 months:

A = $500(1 + 0.04/4)^(4*0.75) = $531.07

After 1 year:

A = $500(1 + 0.04/4)^(4*1) = $542.50

Therefore, the balance of the savings account after 3 months is $510.08, after 6 months is $520.40, after 9 months is $531.07, and after 1 year is $542.50.


3)
To find the interest earned and total balance at the end of each year, we can use the formula for compound interest:

A = P(1 + r/n)^(nt)

Where:

A = the balance after time t

P = the principal (initial deposit)

r = the annual interest rate (as a decimal)

n = the number of times the interest is compounded per year

t = the time period (in years)

For this problem, we have:

P = $1000

r = 0.08

n = 1 (compounded annually)

t = 1 (year)

After year 1:

Interest earned = $1000 x 0.08 = $80

Total balance = $1000 + $80 = $1080

After year 2:

Interest earned = $1080 x 0.08 = $86.40

Total balance = $1080 + $86.40 = $1166.40

After year 3:

Interest earned = $1166.40 x 0.08 = $93.31

Total balance = $1166.40 + $93.31 = $1259.71

Therefore, the interest earned in year 1 is $80, the total balance at the end of year 1 is $1080, the interest earned in year 2 is $86.40, the total balance at the end of year 2 is $1166.40, and the interest earned in year 3 is $93.31, and the total balance at the end of year 3 is $1259.71.

4)

We can use the formula for compound interest to calculate the interest earned and total balance at the end of each year for each savings account:

$100 at 7% for 4 years:

P = $100, r = 0.07, n = 1 (compounded annually), t = 4

Interest earned = $100 x 0.07 x 4 = $28

Total balance = $100 + $28 = $128 after 4 years

$500 at 8% for 3 years:

P = $500, r = 0.08, n = 1 (compounded annually), t = 3

Interest earned = $500 x 0.08 x 3 = $120

Total balance = $500 + $120 = $620 after 3 years

$300 at 6% for 5 years:

P = $300, r = 0.06, n = 1 (compounded annually), t = 5

Interest earned = $300 x 0.06 x 5 = $90

Total balance = $300 + $90 = $390 after 5 years

Therefore, the interest earned by the $100 savings account is $28, and the total balance at the end of 4 years is $128.
The interest earned by the $500 savings account is $120, and the total balance at the end of 3 years is $620.
The interest earned by the $300 savings account is $90, and the total balance at the end of 5 years is $390.

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Answer:7

Step-by-step explanation:

6.7 to the 10 is 7

The answer to the crossnumber is 25.

Number is a mathematical object used to count, measure, and label. It is a fundamental concept in mathematics and is used to describe sets, groups, and other mathematical objects. Numbers are used to measure quantities, such as length, area, time, and weight. They are also used to represent relationships between objects, and to describe the properties of those objects. Numbers can be represented in various forms, such as integers, fractions, and decimals.

This can be determined by examining the clues and their corresponding digits. Across, the clue is "A square", so the digit in the corresponding cell must be a perfect square, in this case 1. The next clue is "An odd square", so the digit must be an odd perfect square, which is 3. Down, the first clue is "A square", so the digit must be a perfect square, which is 5. The last clue is "A square", so the digit must be a perfect square, which is 7. When all the digits are put together, the resulting two-digit number is 25.

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Answer:

9 minutes and 25 seconds to 9 in the evening in analogue time is represented as:

8:50:35 PM

Answer:

Step-by-step explanation:

To simplify the expression, we can use the distributive property of multiplication:

(x−3)(2x^2 −5x−5) = 2x^3 −5x^2 −5x −6x^2 +15x +15

Next, we can combine like terms:

2x^3 −5x^2 −6x^2 −5x +15x +15 = 2x^3 −11x^2 +10x +15

Therefore, the simplified polynomial in standard form is 2x^3 −11x^2 +10x +15.

Answer:

8x - 58 ≤ 500

8x ≤ 500 + 58

8x ≤ 558

x ≤ 69.74

Thus, the area of the pentagon formed by the given coordinates is:

A = 28.5 sq. units.

A pentagon is just a five-sided polygon in geometry having five straight sides and five inner angles totaling 540 degrees. A pentagon is a five-sided, flat (two-dimensional), plane geometric form.

The coordinates of polygon are:

A(1,3), B(2,8), C(8, 8), D(10,3), and E(5,-2).

Plot the points on the graph as shown.

The area of a pentagon calculation is used to determine the area of a pentagon with apothem, a, but one side length, s:

A = 1/2 * a * (5s)

a = apothem, of perpendicular distance from the centre.

s = length of side.

From graph:

s = 6 units.

a is calculated using the tan function.

each interior angle of pentagon  = 54 degrees.

So,

tan (54/2) = a/ (s/2)

tan (36) = a/3

a = 3*tan (36)

a = 1.90 units

A = 1/2 * 1.90 * (5*6)

A = 28.5 sq. units.

Thus, the area of the pentagon formed by the given coordinates is:

A = 28.5 sq. units.

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Answer: James' age now is 12 years old.

The correct answer is true

Answer:

True hope this helps!

4 number was not used in the statement. we can use -3 as the other value.

A simple statement is a single assertion that can be classified as true or false, while a compound statement is formed by combining two or more simple statements using logical operators such as "and", "or", and "not".

To explain the statement mathematically:

First, we evaluate N/N:

N/N = 1

Next, we simplify the inequality using this value:

1•N < N - 1 < N - N

Simplifying further, we get:

N < N - 1 < 0

We can then substitute the values of -4 to 4 for N and see which value(s) satisfy the inequality.

If N = -4, then we have:

-4 < -5 < 0

This is true, so we can use -4 as one of the values.

If N = -3, then we have:

-3 < -4 < 0

This is also true, so we can use -3 as the other value.

Therefore, the completed statement is:

-4/-4 • -4 < -4 - (-4/-4) < -4 + 4/-4 <br>

which simplifies to:

1 < -3 < 5/2

Note that one number, 4, was not used in the statement.

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23/200

Hope it helped

The probability that the mean weight for 100 boys in the 5th grade will be between 60 and 70 pounds is approximately 0.674.

According to the central limit theorem, a statistical theory, regardless of the population distribution's form, the distribution of sample means tends to resemble a normal distribution as sample size grows. This implies that the distribution of the sample means will be about normal if we take several random samples from a population.

Given that, mean weight for 100 boys in the 5th grade will be between 60 and 70 pound.

The z-score is given as:

z = (x - μ) / (s / √(n))

Substituting the values:

z = (70 - 64.9) / (17.5 / √(100)) = 1.143 = 0.674

z = (60 - 64.9) / (17.5 / √(100)) = -1.143 =0.674

Hence, the probability that the mean weight for 100 boys in the 5th grade will be between 60 and 70 pounds is approximately 0.674.

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Answer:

Using the distributive property, we can multiply -5m by each term inside the parentheses:

-5m(-2m + m^2 - 4m^3 + 9) = (-5m)(-2m) + (-5m)(m^2) + (-5m)(-4m^3) + (-5m)(9)

Simplifying each term:

= 10m^2 - 5m^3 + 20m^4 - 45m

The terms are arranged in descending powers of m, so this is already in standard form. Therefore, the final answer is:

20m^4 - 5m^3 + 10m^2 - 45m.

Statement B is true: The population will increase by 9%.

Various Functions:

A single function (Injective function) Many – one function. From onto function (Surjective Function) Function is into. polynomial operation.

P(t)=18,751(1.09)t is the population function, where t is the time in years.

The function's growth factor or multiplier, which is bigger than 1, is represented by the expression (1.09t). In other words, the population is growing over time.

Finding the difference between the final and starting values, dividing by the initial value, and then multiplying by 100% will give us the percentage growth in the population.

Let's contrast the population at t=0 and t=1 to see how they differ:

P(0) = 18,751(1.09)^0 = 18,751

P(1) = 18,751(1.09)^1 = 20,436.59

In the last year, the population has grown from 18,751 to 20,436.59.

The population has grown by the following amount:

[(20,436.59 - 18,751)/18,751] × 100% ≈ 9.0%

Thus, the population will grow by 9%, as stated in statement B.

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The value of x in the figure such that Ray YU is an angle bisector is 18 degrees

Given

The figure

Such that Ray YU is an angle bisector

An angle bisector is a line or a ray that divides an angle into two equal parts or halves.

In other words, an angle bisector divides an angle into two smaller angles with equal measures.

The point where the angle bisector intersects the opposite side is the angle bisector point

This means that

2x = 36

So, we have

x = 18

Hence, the value of x in the figure is 18

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Using proportions we can find,

6. The weight of the adult bear = 750 pounds.

7. The measure of each angles are: 10°, 75° and 95°

In general, the term "proportion" refers to a part, share, or amount that is compared to a whole.

According to the definition of proportion, two ratios are in proportion when they are equal. Two ratios or fractions are equal when an equation or a declaration to that effect is utilized.

Here in the question,

The weight is in the ratio = 3:1000

The average birth weight = 12 ounces = 3/4 pounds.

Now the weigh of adult bear = 1000 × 3/4 = 750 pounds.

In the second part the angles are in the ratio, 2:15:19.

So, 2x+ 15x + 19x = 180

x = 180/36

x = 5

Hence, the measure of each angles are: 10°, 75° and 95°

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Answer:

1.3

Step-by-step explanation:

look at the hundredths place to decide how to round (1.2541).

when a digit is greater than or equal to 5, we round up

in this number, the hundredths place is 5, meaning we round up to get 1.3

i hope this helps :D

The probability of both gumballs not being red is 11/21.

What is the probability?

The probability of the first gumball not being red is:

P(first gumball not red) = P(blue) + P(yellow)

= (6/15) + (5/15)

= 11/15

After removing the first gumball, there are 14 gumballs left in the bag. The probability of the second gumball not being red depends on what color the first gumball was.

Case 1: The first gumball was blue

If the first gumball was blue, there are 5 blue, 4 red, and 5 yellow gumballs left in the bag. The probability of the second gumball not being red is:

P(second gumball not red | first gumball was blue) = P(blue or yellow)

= P(blue) + P(yellow)

= (5/14) + (5/14)

= 5/7

Case 2: The first gumball was yellow

If the first gumball was yellow, there are 6 blue, 4 red, and 4 yellow gumballs left in the bag. The probability of the second gumball not being red is:

P(second gumball not red | first gumball was yellow) = P(blue or yellow)

= P(blue) + P(yellow)

= (6/14) + (4/14)

= 5/7

The probability of both gumballs not being red is the product of the probabilities of each event:

P(both gumballs not red) = P(first gumball not red) * P(second gumball not red | first gumball not red)

P(both gumballs not red) = (11/15) * (5/7)

P(both gumballs not red) = 55/105

P(both gumballs not red) = 11/21

Therefore, the probability of both gumballs not being red is 11/21.

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