Answer:
15
Step-by-step explanation:
(x+3)(x+5)=0
x^2+8x+15=0

The expression you would substitute for x is -2y+4. The answer is d.
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38.5000 kph < 38.5199 kph
Answer:
It should look like a v with the origin at +0.5
Step-by-step explanation:
perimeter = 2width + 2 length
102 = 2(x+9) + 2x
102 = 2x + 18 +2x
102 = 4x +18
84 = 4x
21 = x
Length = x = 21 inches
Width = x + 9 = 21 + 9 = 30 inches