39
Divide 78 by 2 to get 39 and add in to the number
Answer:
10 feet
Step-by-step explanation:
define variables:
y= height of the boards
x= distance to corner
we are trying to figure out what x is since we know the height of the board
4= 0.4x
divide both sides by 0.4
10=x
Answer:
n=-2
Step-by-step explanation:
4n=-8
n=-8/4
n=-2
Answer:
60 mph
Step-by-step explanation:
(R-10)*3 + R*3 = 330
R=60