Nicole bought
6
CDs that were each the same price. Including sales tax, she paid a total of
$
69.60
. Of that total,
$
4.20
was tax. What was the price of each CD before tax?

Answer:

Step-by-step explanation:

Lorsque l'exposant (a) est positif, alors la puissance de dix 10a correspond au nombre 1 suivi d'un nombre de zéros correspondant au chiffre a. Quelques exemples : 103 correspond au nombre 1 suivi de 3 zéros donc 103 = 1 000.

Answer:

To calculate the interest rate, we can use the formula for the present value of an annuity:

PV = PMT x [(1 - (1 + r)^(-n)) / r]

where:

PV = present value

PMT = monthly payment

r = interest rate per period

n = number of periods

In this case, we have:

PV = $12,300 (the sticker price)

PMT = $420

n = 36 (36 months)

Substituting these values into the formula, we get:

12,300 = 420 x [(1 - (1 + r)^(-36)) / r]

Simplifying this equation algebraically is not possible, so we need to use numerical methods to solve for r. One way to do this is to use a financial calculator or spreadsheet program, which can find the interest rate that makes the equation true. Using Excel's RATE function, for example, we get:

=RATE(36,-420,12300)

This gives us an interest rate of approximately 3.33% per month or 39.96% per year.

Therefore, Ella is being offered an interest rate of 3.33% per month or 39.96% per year.

Answer:

  a1 = 1875

Step-by-step explanation:

You want a1 for the geometric series that has r = 2/5, an = 120, and Sn = 3045.

The n-th term of the geometric series with first term a1 and common ratio r is ...

  an = a1·r^(n-1)

The sum of the first n terms of the geometric series is ...

  Sn = a1·(r^n -1)/(r -1)

We can use the expression for an to substitute for r^n in the sum equation:

  [tex]a_n=a_1(r^n)(r^{-1})\\\\r^n=\dfrac{a_n}{a_1r^{-1}}=\dfrac{a_nr}{a_1}\\\\S_n=a_1\dfrac{r_n-1}{r-1}=a1\dfrac{\dfrac{a_nr}{a_1}-1}{r-1}\\\\S_n=\dfrac{a_nr-a_1}{r-1}\\\\a_1=a_nr-S_n(r-1)=a_nr+(1-r)S_n\\\\a_1=(120)\dfrac{2}{5}+(1-\dfrac{2}{5})(3045)=\dfrac{2\cdot120+3\cdot3045}{5}\\\\\boxed{a_1=1875}[/tex]

__

Additional comment

The sum is of the first four terms:

  1875 +750 +300 +120 = 3045

We can also find this by working backward. The previous term is 5/2 times the current term. We need to find the terms that have a sum of 3045.

  120 +300 +750 +1875 +4687.5 +...

Clearly, 5 terms is too many. The sum of the first 4 terms of the backward series is 3045, so we know n=4 and the first term is 1875—the last term of our 4-term backward series.

The quadratic equation f(x) = x² + 2x - 12 can be rewritten as f(x) = (x + 1)²- 13 using the completing square method.

Completing the square is a strategy used in algebra to solve quadratic equations of the type ax² + bx + c = 0, where a, b, and c are constants and x is the variable. By converting the quadratic equation into a perfect square trinomial, the square roots of both sides of the equation may be used to quickly solve the problem. This is the core notion behind the completion of the square. The quadratic expression becomes a perfect square when we add and subtract a specific number from it to complete the square. Half of the x-term squared coefficient is equal to the sum of the numbers we add and remove.

The given function is f(x) = x² + 2x-12.

Now, group the x terms together:

f(x) = (x² + 2x) - 12

Between the parenthesis, add and remove the square of the x-half-coefficient: term's:

f(x) = (x² + 2x + (2/2)² - (2/2)²) - 12

f(x) = (x + 1)² - 1 - 12

f(x) = (x + 1)² - 13

Hence, the quadratic equation f(x) = x² + 2x - 12 can be rewritten as f(x) = (x + 1)² - 13.

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Answer:

15 centimeters

Step-by-step explanation:

radius is half of the circles diameter

Answer:

Step-by-step explanation:

(x+3)^2=49

x+3=√(49)

x+3=√(7^2)

x+3=7

x+3-3=7-3

x+3=-√(49)

x+3=-7

x+3-3=-7-3

x = 4,-10

Answer: the missing digit would be 2

721,846 rounded to the nearest ten thousand is 720,000

Answer:

We can use the formula for compound interest to find the future value of Lyla's investment:

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

where A is the future value, P is the principal (initial investment), r is the annual interest rate as a decimal, n is the number of times interest is compounded per year, and t is the time in years.

Substituting the given values, we get:

A = $2,500(1 + 0.05/2)^(2*15)

Simplifying, we get:

A = $2,500(1.025)^30

Using a calculator, we get:

A ≈ $5,016.35

Therefore, Lyla's investment will be worth approximately $5,016.35 in 15 years if interest is compounded semiannually. Rounded to the nearest dollar, the answer is $5,016.

Answer:  36

Step-by-step explanation:

2root3 * 3root12

2*3*root3*root12

6root36

root36=6

6*6=36

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Answer: The quotient is 199.277777778, the answer is the hundreds place

Step-by-step explanation:

199.277777778, the 1 in 199 is in the hundreds place :)

Answer:

Adam's thinking is not correct.

When subtracting 10 from 708, we need to borrow 1 from the hundreds digit and add it to the tens digit. This will result in a new hundreds digit of 6 and a new tens digit of 9. The ones digit remains the same. Therefore, the correct answer would be 698.

Adam's answer is also 698, but his reasoning is incorrect. He thinks that both the tens and hundreds digits change, which is not the case. In reality, only the tens digit changes while the hundreds digit decreases by 1 due to the borrowing process.

thank me by marking my answer as brainliest!

The amounts of each substance needed to obtain a mixture of 20 pounds at a price of $5.4 per pound is given as follows:

The amounts are obtained by a system of equations, for which the variables are given as follows:

The mixture has a total of 20 pounds, hence:

x + y = 20.

y = 20 - x.

The total cost of the mixture is of $108, as 108/20 = 5.4, hence:

7x + 3y = 108

Replacing the second equation into the first, the value of x is given as follows:

7x + 3(20 - x) = 108

4x = 48

x = 12.

Then the value of y is given as follows:

y = 20 - 12

y = 8.

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Answer:

What Mathematics

Step-by-step explanation:

Given:-

To find:-

Answer:-

In the given right angled triangle, we may use the trigonometric ratios. We can see that the measure of the longest side is 5 which is hypotenuse and the measure of perpendicular needs to be find out .

We may use the ratio of sine here as , we know that in any right angled triangle,

[tex]\implies\sin\theta =\dfrac{p}{h} \\[/tex]

And here , p = 5 and h = x , so on substituting the respective values, we have;

[tex]\implies \sin\theta = \dfrac{x}{5} \\[/tex]

Again here angle is 45° . So , we have;

[tex]\implies \sin45^o =\dfrac{x}{5} \\[/tex]

The measure of sin45° is 1/√2 . so on substituting this we have;

[tex]\implies \dfrac{1}{\sqrt2}=\dfrac{x}{5} \\[/tex]

[tex]\implies x =\dfrac{5}{\sqrt2}\\[/tex]

Value of √2 is approximately 1.414 . So we have;

[tex]\implies x =\dfrac{5}{1.414} \\[/tex]

[tex]\implies \underline{\underline{\red{\quad x = 3.53\quad }}}\\[/tex]

Hence the value of x is 3.53 .

and we are done!

Answer:

The length of side x to the nearest tenth is 3.5.

Step-by-step explanation:

From inspection of the given right triangle, we can see that the interior angles are 45°, 45° and 90°. Therefore, this triangle is a 45-45-90 triangle.

A 45-45-90 triangle is a special right triangle where the measures of its sides are in the ratio  1 : 1 : √2.  Therefore, the formula for the ratio of the sides is b: b : b√2 where:

We have been given the hypotenuse, so:

[tex]\implies b\sqrt{2}=5[/tex]

Solve for b:

[tex]\implies \dfrac{b\sqrt{2}}{\sqrt{2}}=\dfrac{5}{\sqrt{2}}[/tex]

[tex]\implies b=\dfrac{5}{\sqrt{2}}[/tex]

The side labelled "x" is one of the sides opposite the 45° angles, so:

[tex]\implies x=b[/tex]

Substitute the found value of b into the equation for x:

[tex]\implies x=\dfrac{5}{\sqrt{2}}[/tex]

[tex]\implies x=3.5355339...[/tex]

[tex]\implies x=3.5\;\sf(nearest\;tenth)[/tex]

Therefore, the length of side x to the nearest tenth is 3.5.

The sum of the measures of the two angles is 180 degrees, as they are angles of a straight line. The measure of the first angle is 4x = 72 degrees, and the measure of the second angle is 6x = 108 degrees.

What is angle ?

A measure of rotation of two crossing lines or planes in mathematics is called an angle. Angles are frequently defined as degrees or radians. Two lines or splines intersect at a location, known as the apex of the angle, to produce an angle. The edges of the angle are the two lines and line segments. According to its measurement, an angle can be categorized as: An acute angle is one that ranges from 0 to 90 degrees. Right arc: an angle that is 90 degrees in length. A measureable angle intermediate 90 and 180 degrees is referred to as an obtuse angle. 180 degree angle is referred to as a straight angle.

The sum of the measures of the two angles is 180 degrees, because they are angles of a straight line. Therefore:

4x + 6x = 180

Simplifying the left-hand side, we get:

10x = 180

Dividing both sides by 10, we obtain:

x = 18

So the measure of the first angle is:

4x = 4(18) = 72 degrees

And the measure of the second angle is:

6x = 6(18) = 108 degrees

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The complete question is: What is the measurement of an angle if its measure is 4x and another angle's measure is 6x?

Answer:

A, C, and D

Step-by-step explanation:

If you split the shape right along the bottom of the first part, you get two parallelograms. If you split it like you split it the first time and then split it along the side of the bottom parallelogram you get a triangle, a parallelogram, and a trapezoid. Then, because the area of a parallelogram is A=bh, you can substitute the numbers in. 5*12=60 and 6*11=66. However, this is not all, remember to add the area together! 60+66=126 so D is also true.

Hope this helps!

Altitude is in a polygon, a perpendicular segment from a vertex to the opposite side or to the line containing the opposite side.

In geometry, the hypotenuse is the longest side of a right-angled triangle, opposite to the right angle. It is also the side that connects the two other sides, which are called the adjacent and opposite sides.

One of the key properties of the geometric mean is that it is always less than or equal to the arithmetic mean (the regular average) of the same set of numbers, except when all the numbers are equal.

The geometric mean is used in various fields such as finance, economics, biology, and physics. It is particularly useful in situations where values are subject to compounding or exponential growth, and where small changes in values can have a significant impact over time.

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Given:

P = 34 [Perimeter]

W = 6.5 {let's use W and L to make it easy to read]

Also known:

P = W + L + W + L = 2(W+L)

Fill in values:

34 = 2(6.5+L) [NOTE: This is an equation to determine the length (L) of the rectangle."]

17 = 6.5 + L [NOTE: This is a simplified form of the above equation.]

10.5 = L [NOTE: This is the solution (the value of L)]

Answer:

Anna should receive $0.17 (17 cents) in change

Step-by-step explanation:

Anna has $1, she spends $.83 on candy

To find how much change she will get, we must subtract

1 - 0.83

$0.17

Answer:$0.17

Step-by-step explanation:

A dollar is 100 cents just subtract 83 from 100 to get 17.

This function's definition is given by the formula [tex]c = 50t + 200[/tex].

Consider how many individuals and gadgets will be utilizing the network at once as well as how it will be utilized before choosing the "optimal" speed for your home. As a general rule, anything that can connect many devices simultaneously and is above 200 Mbps is regarded as "fast" internet.

Speed, which is a scalar number, is the "speed at which an item is moving." The pace at which an item travels a distance may be referred of as its speed. A fast-moving item travels at a great velocity and completes a significant distance in a brief period of time.

[tex]y = mx + b[/tex]

Where [tex]y,x[/tex] are variables, m is the rate of change  and [tex]b[/tex] is the y intercept.

Let [tex]c[/tex] represent the distance June has traveled after time [tex]t[/tex].

Since the cities are [tex]200[/tex]miles apart, hence [tex]b = 200[/tex]. Also the speed is [tex]50[/tex]mph, hence [tex]m = 50[/tex]:

[tex]c = 50t + 200[/tex]

The formula that describes this function is [tex]c = 50t + 200[/tex]

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We may conclude after answering the presented question that Therefore, the coordinates of point C are (-6, 0).

In mathematics, a coordinate is a number or combination of numbers that represents the location of a point or object in space. Coordinates are frequently used to define a point or object's position in a certain coordinate system, such as the Cartesian or polar coordinate systems. In the Cartesian coordinate system, a point is found by its distance from the origin along the x-axis and its distance from the origin along the y-axis. These distances are represented by two integers, the x-coordinate and the y-coordinate. The point's location in the plane is specified by the two coordinates.

Using the distance formula, we can find the distances AC and CB:

[tex]AC = \sqrt((x - (-8))^2 + (y - 4)^2)\\CB = \sqrt((10 - x)^2 + (-2 - y)^2)\\[/tex]

Since AC:CB = 2:1, we have:

[tex]AC/CB = 2/1\sqrt((x - (-8))^2 + (y - 4)^2) / \sqrt((10 - x)^2 + (-2 - y)^2) = 2/1\\(x - (-8))^2 + (y - 4)^2 / ((10 - x)^2 + (-2 - y)^2) = 4\\(x - (-8))^2 + (y - 4)^2 = 4((10 - x)^2 + (-2 - y)^2)\\5x^2 + 5y^2 - 116x + 20y + 340 = 0\\(x - (-8))^2 + (y - 4)^2 = r^2\\(x - (-8))^2 + (y - 4)^2 / ((10 - x)^2 + (-2 - y)^2) = 4\\[/tex]

where r is the radius of the circle.

Solving this system of equations, we get:

x = -6

y = 0

Therefore, the coordinates of point C are (-6, 0).

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By adding fractions that represent each of the amounts of cupcakes, we can see that you need 9 cupcakes for you and your friends.

Her we know that you want 3 halves of a cupcake for yourself, 8 halves for your friend, and 7 halves for your other friend.

So we just need to add all of these fractions, to do so, we need to solve the follwing opeartion:

3*(1/2) + 8*(1/2) + 7*(1/2)

3/2 + 8/2 + 7/2

All of these have the same denominator so we can directly add them up:

3/2 + 8/2 + 7/2 = (3 + 8 + 7)/2

(3 + 8 + 7)/2 = 18/2

18/2 = 9

You need 9 cupcakes for you and your friends.

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Complete question:

"I want 3 halves of a cupcake for myself, 8 halves for my friend, and 7 halves for our other friend. How many halves we need in total?"

29 + 14 = 44 by decomposing numbers to add and make a new 10.

Decomposition of numbers involves breaking a number down into its constituent parts or smaller numbers that add up to the original number. This can be done in different ways depending on the purpose and context of the problem.

For example, one common way of decomposing a number is by place value. In this case, the number is broken down into its digits, which represent different powers of ten. For instance, the number 562 can be decomposed into 500 + 60 + 2.

Another way of decomposing numbers is by factoring. In this case, the number is expressed as a product of its factors. For example, the number 12 can be decomposed as 2 x 2 x 3.

Decomposing numbers is a useful skill in many areas of mathematics, including arithmetic, algebra, and geometry. It is often used to simplify problems, make computations easier, and facilitate further analysis.

To decompose 29 to make a new 10, we can break it into 9 and 20. Then, to decompose 14 to make a new 10, we can break it into 6 and 8.

So, we have:

29 + 14 = (9 + 20) + (6 + 8)

Now, we can regroup the numbers to make a new 10:

= (9 + 1) + (20 + 6) + 8

= 10 + 26 + 8

= 44

Therefore, 29 + 14 = 44 by decomposing numbers to add and make a new 10.

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Answer:

To find your gross pay, we can use the following formula:

Gross Pay = Take Home Pay / (1 - Federal Withholding Tax Rate)

Plugging in the given values, we get:

Gross Pay = 3,210 / (1 - 0.16)

Simplifying the denominator, we get:

Gross Pay = 3,210 / 0.84

Calculating the division, we get:

Gross Pay = 3,821.43

Therefore, your gross pay was $3,821.43.

Answer:

51

Step-by-step explanation:

3x+4y^2

3(5)+4(3)^2

3(5)+4(9)

15+36

51

Answer: 51

Step-by-step explanation:

Answer:

Try using the Symbolab calculator.

Step-by-step explanation:

Thats what I usually use and it works

Total volume of shape is =144cu.cm

By knowing the length of the cube's edges, we can quickly determine its volume (V). Assume that "a" is the cube's edge length. The product of length, height, and breadth will then be the V. The cube's volume formula is as follows:

Cube Volume = Length× Width× Height

Volume equals= a× a× a =a³

where "a" denotes the cube's side or edges' length.

Length of each cube = 2cm

Volume of each cube=a³

=2³

=8cm³

Total number of cubes=18

Total volume of shape=18×8

=144 cu.cm

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Answer:

+4

Step-by-step explanation:

F(x,y)   = 3x+y      and y <= -2x+ 4     sub in for 'y'

          = 3x  + (-2x+4)

          = x + 4

If you look at the graph for   y <= - 2x+4   ( see below)

    you will see that the domain (x values ) can only go from 0 to 4 and the max value is +4     ( rememeber too that y is restricted to >= 0  as is x )

Answer:The measure of Ф = 75.7° :)

Step-by-step explanation:the measure of Ф = 75.7°,We will use the rule sin to find the measure of Ф

At first we will find the angle opposite to the side of length 31

∵ 180° - 73° = 107°

hope this helps:)(:

(x + 5) is nοt necessarily a factοr οf the pοlynοmial, (x-4) is a factοr οf the pοlynοmial are cοrrect statement.

Functiοn can be define in which it relates an input tο οutput.

If the graph οf a pοlynοmial functiοn P(x) has x-intercepts at x = -4, x = 0, and x = 5, then we knοw that the factοrs οf P(x) are (x + 4), x, and (x - 5). This is because a pοlynοmial has x-intercepts where the value οf P(x) is equal tο zerο, and this οccurs when each factοr is equal tο zerο.

Therefοre, we can cοnclude that (x + 4) and (x - 5) are factοrs οf the pοlynοmial P(x), but x is nοt necessarily a factοr. This is because x is a linear factοr with a zerο intercept, but it cοuld be cancelled οut by anοther factοr in the pοlynοmial.

Thus, the cοrrect statement is:

(x + 5) is nοt necessarily a factοr οf the pοlynοmial.

(x-4) is a factοr οf the pοlynοmial.

The degree οf the pοlynοmial is 3 οr greater since the pοlynοmial has three x-intercepts. Hοwever, we cannοt determine the exact degree οf the pοlynοmial withοut additiοnal infοrmatiοn.

Therefοre, (x + 5) is nοt necessarily a factοr οf the pοlynοmial, (x-4) is a factοr οf the pοlynοmial are cοrrect statement.

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