Sally is buying new school supplies. She used a 15% off coupon on a set of markers that was originally $3.00. She also bought some paper that was 20% off. In total, Sally spent $5.35 after using her coupons. How much was the original price of the paper? A. $2.55 B. $2.80 C. $3.50 D. $4.28

The original price of the paper is $3.50

Step-by-step explanation:

15% off coupon for the markers

Amount paid on the markers will be;

3- (15% of 3)

= 3-0.15(3) = 3-0.45 = $2.55

So the amount paid for the papers will be;

5.35 - 2.55 = $2.8

let the original price of the paper be x

x - 20% of x = 2.8

x - x/5 = 2.8

4x/5 = 2.8

4x = 2.8 * 5

4x = 14

x = 14/4

x = $3.50

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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