Answer:
x=5
Step-by-step explanation:
F(x)=-3x+21,
f(x)=6 = -3x+21
6 = -3x+21
Subtract 21 from each side
6-21 = -3x+21-21
-15 = -3x
Divide each side by -3
-15/-3 = -3x/-3
5 = x
D. 180/4=45. That’s the distance in an hour. Then multiply that by 8.
From all the math I’ve done it does not seem that any of them a correct
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9.5:12.6
That is the answer, btw the 6 is repeating
