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maria [59]
3 years ago
7

A store offers a 15% discount on all items in the storage on a cell All Star employee gets in the aditional 10% employee discoun

t in the equation below C represents the cost of an item for an employee including tax and x represents the original price of the item
C=0.765x+0.06(0.765×)

Chris is an employee at the store. He plans to buy a coat during the sale. The price of the coat before the discount is 100$. How much will Chris pay for the coat during the sale? Remember,do not include the $ symbol.​
Mathematics
1 answer:
pochemuha3 years ago
8 0

Answer:

$81.09

Step-by-step explanation:

C=0.765(100)+0.06<u>(0.765x100)</u>

C=0.765(100)+<u>0.06x76.5</u>

C=<u>0.765(100)</u>+4.59

C=76.5+4.59

C=81.09

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Which equation has x=4 as the solution
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What is an equation of the line that is perpendicular to −x+2y=4 and passes through the point (−2, 1) ?
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Answer:

y=-2x-3

Step-by-step explanation:

Since our equation is in standard form Ax+By=C we must first manipulate the equation so that we have it in the slope-intercept form such that y=mx+b.  Therefore:

-x+2y=4\\2y=x+4\\\\y=\frac{x+4}{2}\\\\y=\frac{1}{2}x+2

Therefore, our slope is 1/2 and our y-intercept is 2.  Now in order to determine a perpendicular line to the one stated above we must then get the negative inverse of our slope meaning \frac{1}{2}=-2 (negative reciprocal).  Now we must use the point slope formula:

y=m(x-x_1)+y_1

Where m is the slope, x1 is -2 and y1 is 1 (because of the ordered pair given). And so:

y=-2(x-(-2))+1\\\\y=-2(x+2)+1\\\\y=-2x-4+1\\\\y=-2x-3

Therefore, the line that is perpendicular to -x+2y=4 is y=-2x-3.


6 0
3 years ago
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