A music store marks up the instruments it sells by 30% a, if the store bought a guitar for $45, what will be its store price
b. If the price tag on a trumpet say $104, how much did the store pay for it?

A. $58.50, B. $80

Step-by-step explanation:

mark up percentage x 100

30 x 45 = 100SP - 4500

5850 = 100SP

Store Price > therefore, $ 58.50

A. $58.50

Actual Price :

130 AP = 10400 - 100AP

AP > $80

B. $80

step-by-step explanation: h: (- 3, 6)

m: (1, - 2)

o: (7, 6)

r: (- 9, - 2)

midpoint of hm: (- 1, 2)

midpoint of or: (- 1, 2)

therefore, b is the midpoint of both diagonals bisect each other !

to prove the diagonals are perpendicular, show that the product of the slopes = - 1

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