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lianna [129]
4 years ago
10

The cost of a CD at Ernesto's Music Emporium is $12, including tax. Brian has a $100 gift card from Ernesto's. What is his balan

ce after he buys 4 CDs?
Mathematics
2 answers:
stiv31 [10]4 years ago
7 0
COST OF CD'S
12 x 4 = 48

GIFT CARD BALANCE
100 - 48 = 52

Therefore the balance of his gift card is $52 after he purchases 4 CD's
ivann1987 [24]4 years ago
3 0
I think 52 because its 2 tax on each cd
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keeping in mind that parallel lines have exactly the same slope, let's check for the slope of the equation above

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so we're really looking for the equation of a line with a slope of -2 and that passes through (1 , -1)

(\stackrel{x_1}{1}~,~\stackrel{y_1}{-1})\qquad \qquad \stackrel{slope}{m}\implies -2 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{(-1)}=\stackrel{m}{-2}(x-\stackrel{x_1}{1}) \\\\\\ y+1=-2x+2\implies y=-2x+1

8 0
3 years ago
Solve the following inequality for d. Write your answer in simplest form.
suter [353]

Answer:

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Step-by-step explanation:

Let's solve your inequality step-by-step.

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Step 1: Simplify both sides of the inequality.

9d−57>8d+10

Step 2: Subtract 8d from both sides.

9d−57−8d>8d+10−8d

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Step 3: Add 57 to both sides.

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Answer:

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Step-by-step explanation:

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Gnesinka [82]

Answer:

170

Step-by-step explanation:

<em>How the sales tax de-calculator works </em>

<em>Step 1: take the total price and divide it by one plus the tax rate. </em>

<em>Step 2: multiply the result from step one by the tax rate to get the dollars of tax. </em>

<em>Step 3: subtract the dollars of tax from step 2 from the total price. </em>

<em>Pre-Tax Price = TP – [(TP / (1 + r) x r] </em>

<em>TP = Total Price.</em>

3 0
3 years ago
Help me! Thanks a lot.
kari74 [83]

Answer:

4

Step-by-step explanation:

1 x 24

2 x 12

3 x 8

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8 0
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