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Gnesinka [82]
2 years ago
9

A premedical student at a university was complaining that she had just paid $158. 60 for her human anatomy book, including tax.

Find the price of the book before taxes if the university tax rate is 9%
Mathematics
1 answer:
Artist 52 [7]2 years ago
3 0

Answer:

145.50

Step-by-step explanation:

158.60 / (1+.09)

158.60 / 1.09 = 145.50458 (<em>Approximately, I assume you have to round. I included extra digits incase they want more.</em>)

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You buy 2 shirts and 1 pair of pants for $34. Your friend buys 3 shirts and 3 pairs of pants for $69. What is the price of 1 shi
V125BC [204]

You buy 3 shirts and 1 pair of pants for $32. Your friend buys 2 shirts and 3 pairs of pants for $40. How much did each item cost?

First let’s define a shirt as X and pants as Y!

In the first scenario, the equation will be 3X + Y =$32

In the second scenario, the equation will be 2X + 3Y = $40  

Now because we have two different variables (X & Y) let’s solve for one of them (Ex: Y) to simplify the equations!

3X + Y= $32—> subtract 3X on both sides of the equation  

-3X.        - 3X

Net result: Y= 32- 3X

Now we can insert this into the second equation 2X + 3Y = $40 in order to solve for X variable  

2X + 3(32-3X) = $40

2X + 96 - 9X = $40 —> simplify the equation  

-7X + 96 = $40 —> substrate 96 from both sides  

-7X = -56 —> divide both sides by -7  

X= 8  

Now reinsert 8= X into 3X + Y = $32

3(8) + Y = $32

24+ Y = $32 —> substract 24 from both sides

y = 8

ANSWER: X= 8, Y= 8

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Step-by-step explanation:

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