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Shalnov [3]
2 years ago
12

help pleeesea!!!!!!!!!!!.Trina downloaded 3 music albums and 5 audio books one week at a cost of $49.60. The next week she downl

oaded 1 music album and 2 audio books at a cost of $20.50. Her mother wants to write a system of equations to determine the price of one music album and one audio book. She uses the variables x and y. She lets x represent the cost of one music album. What will y represent?
Mathematics
2 answers:
Ad libitum [116K]2 years ago
8 0

Y is the Audio Book.

"determine the price of one music album and one audio book"

"She lets x represent the cost of one music album."

According to this information "One Audio Book" should be the correct answer. Have a great day!

ICE Princess25 [194]2 years ago
5 0

Answer:

y will represent the cost of one audio book.

Step-by-step explanation:

Here, the cost of 3 music albums and 5 audio books is $49.60 and 1 music album and 2 audio books is $20.50,

Since, there are two unknown values,

First one is the cost of one music album,

Second one is the cost of one audio book,

We know that, for finding an unknown value we take a variable,

If we have variables x and y in which x represent the cost of one music album, then y must represent the cost of one audio album.

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katrin [286]

Corey stepped back 59.71 feet to get a better view of the bird.

Explanation:

This is a right angled triangle. Let \theta be the angle of elevation.

Let the adjacent side of the triangle be x for the angle \theta

Let the opposite side of the triangle by y for the angle \theta

Thus,

\tan \theta=\frac{y}{x}

Since, the height of the tree is 80 feet, y=80

To find the value of x, let us substitute y=80 and \theta=68

x=\frac{80}{\tan 68^{\circ}}=32.32

Since, Corey moves back a few steps to gain a better view of the bird, the angle of elevation is 41°

Now, we shall find the x for  y=80 and \theta=41

x=\frac{80}{\tan 41^{\circ}}=92.03

To find how many feet Corey step back is to subtract the value of two adjacent sides, thus,

x=92.03-32.32=59.71

Thus, Corey stepped back 59.71 feet to get a better view of the bird.

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1 year ago
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kifflom [539]

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Step-by-step explanation:

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2 years ago
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2 years ago
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5 0
2 years ago
X = y - 3
mojhsa [17]
Hello,
{x=y-3
{x+3y=13;

{x=y-3
{y-3+3y=13;


{x=y-3
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{x=y-3
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{x=y-3
{y=16:4=4;

{x=4-3=1
{y=4;

{x=1
{y=4

the solution to the system of equations is (1,4)

Bye :-)
8 0
2 years ago
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