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nata0808 [166]
3 years ago
14

Walden's family is shopping for a reclining chair. The chair the family decided on has a retail price of $800 plus 5% sales tax

at
four stores. Each store is offering a different promotion.
Store
A
B
C
D
Promotional Offer
$75 instant rebate
10% off sale
% off sale plus store pays sales tax
"no tax" sale the store pays the tax
5
a
Which store has the best deal?
store A
store B
store C
store D
Mathematics
1 answer:
hoa [83]3 years ago
3 0
I dont get what the letter mean what goes with each thing
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Write the equation of a line perpendicular to 5x−9y=−8 that passes through the point ​(−5​,8​).
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Answer:  y = -(9/5)x - 1

Step-by-step explanation:

Rewrite the equation in standard form:  y = (5/9)x+(8/9).  [y=mx+b]

A line perpendicular to this would have a slope that is the negative inverse of the original slope (5/9), which would make it -(9/5).  The y-intercept would also change, but we don't know the value, yet.  For now, we'll use "b" for the y-intercept.  This results in a perpendicular line:

y = -(9/5)x + b

We can calculate b, the y-intercept, by using the point (-5,8) and solving for b.

8 = -(9/5)*(-5) + b

8 = (9) + b

b = -1

The line perpendicular to 5x−9y=−8 that passes through the point ​(−5​,8​) is

y = -(9/5)x - 1

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3 years ago
What is the slope of this line?
olga2289 [7]

Answer:

3

Step-by-step explanation:

In the Slope-Intercept Formula, <em>y</em><em> </em><em>=</em><em> </em><em>mx</em><em> </em><em>+</em><em> </em><em>b</em><em>,</em><em> </em><em>m</em><em> </em>is the <em>Rate</em><em> </em><em>of</em><em> </em><em>Change</em><em> </em>[<em>Slope</em>]. Anyway, starting from the <em>y-intercept</em><em> </em>of [0, 2], move 3 units <em>north</em><em> </em>over 1 unit <em>east</em><em>.</em><em> </em>That is called <em>rise</em><em>\</em><em>run</em><em> </em><em>→</em><em> </em>3\1 = 3.

I am joyous to assist you anytime.

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