<h2>Answer : 144 cents</h2>
Step by step explanation
<u>Given: cost of 21 inches of wire costs 63 cents</u>
<u>Cost of 1 inch wire = 63/21 = 3 cents</u>
<u>Cost of 48 inches of wire = 48×3 = 144 cents</u>
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times by a on both sides
a(a+8)= -5
expand brackets
a^2 + 8a = -5
minus 5 on both sides to set equal to 0
a^2 + 8a -5 = 0
use quadratic formula to get 2 solutions
-
![\frac{ - (8) + or - \sqrt{ {8}^{2} - 4(1)(5) } }{2(1)}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-%20%288%29%20%2B%20or%20-%20%20%5Csqrt%7B%20%7B8%7D%5E%7B2%7D%20-%204%281%29%285%29%20%7D%20%7D%7B2%281%29%7D%20)
type into calculator. one solution from + other from -
Answer:
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Step-by-step explanation: