Answer:
amswer is 7mph
Step-by-step explanation:
i said so
THe problem is basically telling us: 
where P is the power disappated and V^2 is our voltage squared.

So, for the second example to find the power we simply have to plug k and our voltage back in, so:
Answer:
There are 132 red marbles and 12 black marbles
Work:
I made a ratio of 11:1 and multiplied both sides by 12 which gave me 132:12
132+12=144
Bill is 5 years old and annie is 6 years old so, you multiply 5×6=30
X + 2y = -8
-x - y = -4
y = -12
x = -8 - 2 (-12) = -8 + 24 = 16
It has a one solution