dannisundrop
08.04.2020 •
Mathematics
A sporting goods store buys a basketball for $10.00 and then adds a 110% markup to the price. How much will the basketball sell for in the store.
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Ответ:
d
Step-by-step explanation:
Given the 2 equations
2x - y = 11 → (1)
x + 3y = - 5 → (2)
Multiplying (1) by 3 and adding to (2) will eliminate the term in y
6x - 3y = 33 → (3)
Add (2) and (3) term by term
(x + 6x) + (3y - 3y) = (- 5 + 33)
7x = 28 ( divide both sides by 7 )
x = 4 → (d)