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lisov135 [29]
3 years ago
5

A shoe store is having a sale where every pair of shoes cost $15. If you buy more than five pairs, you get a 10℅ discount. How m

uch will it cost for seven pairs of shoes? is A. $70 B. $88.25 C. 94.50 D. $105
Mathematics
1 answer:
IrinaK [193]3 years ago
6 0
The answer is 94.50 so C. I hope this helped. :)
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As of right now, Katie’s college fund has $601.85. If she deposits a check for $225, how much money will she have in her college
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2 years ago
the question is in the picture below, if you could show all your work so i can see how to do it, that would be appreciated.
ki77a [65]

m∠R = 27.03°

Solution:

Given In ΔQRP, p = 28 km, q = 17 km, r = 15 km

To find the measure of angle R:

Law of cosine formula for ΔQRP:

r^{2}=p^{2}+q^{2}-2 pq \cos R

Substitute the given values in the above formula.

(15)^{2}=(28)^{2}+(17)^{2}-2 (28)(17) \cos R

225=784+289-952 \cos R

225=1073-952 \cos R

Switch the given equation.

1073-952 \cos R=225

Subtract 1073 from both side of the equation.

-952 \cos R=-848

Divide by –952 on both sides.

$ \cos R=\frac{106}{119}

$  R=\cos^{-1} \left(\frac{106}{119}\right)

R=27.03^\circ

Hence m∠R = 27.03°.

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