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3 years ago

Zack bought a coat for $69.78. He paid with a $100 bill and received $26.73 in change.How Much was the sales tax? Show your work

1 answer:

7 0

69.78+26.73-100 just use your calculator and you will out and that a hint

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ExtremeBDS [4]

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Nina [5.8K]

$\text{Hello there! :)}$

$x = 8\\\\AB = 128 \text{ units}$

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$\text{Since Point M is the midpoint of AB, then:}\\\\AM = MB\\\\$

$\text{Set the two equations equal to each other:}\\\\3x + 40 = x^{2} \\\\$

$\text{Move all terms over to one side to simplify more easily:}\\\\0 = x^{2} - 3x - 40$

$\text{Factor by finding numbers that sum up to -3 and multiply into -40:}\\\\0 = (x - 8)(x + 5)\\\\x = -5, 8$

$\text{The length of a segment cannot be negative, so choose the positive solution:}\\\\x = 8$

$\text{Substitute in this value of x into either AM or MB to solve for AB:}$

$AB = 2(MB)\\\\AB = 2(x^{2} )\\\\AB = 2(8^{2})\\ \\AB = 2(64)\\\\AB = 128 \text{ units}$

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3 years ago

Doss [256]

157= one hundred and fifty seven

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2 years ago

AfilCa [17]

Step-by-step explanation:

First u have to do the work of bracket and the solve

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2 years ago