X=-3
because
-4x=21-9
-4x= 12 divide both sides
x=-3
(1 / 5) hour is 12 minutes and five times this equals 1 hour.
So the distance times 5 equals miles per hour.
(3 / 4) * 5 = 15 / 4 = 3.75 mph
i think the answer is c :)
<span>the answer is x² + (y + 3)² = 4 C. i just did the problem</span>
Simple...
you have:

and

To solve for....

Multiply to remove the denominator-->>

n=12*3
n=36
Then-->>>

Do the same thing-->>

n=-12*3
n=-36
Thus, your answer.