b. Your swimming pool is in the shape of a cylinder with a diameter of 16 feet and has the same volume as your friend’s pool. What is the height of your pool? Round your answer to the nearest whole number.
c. While you were on vacation, 6 inches of water evaporated from your pool. About how many gallons of water evaporated from your pool? ( ) 3 1 ft 7.5 gal ≈ Round your answer to the nearest whole number.
A: -x – 2y = -4
B: -x – 2y = -2
C: -2x+y= -4
D: - 2x + y = 2
Answer: D. - 2x + y = 2
Step-by-step explanation:
The equation given is -2x + y = 6
Let us re- write it in slope - intercept form , that is we will make y the subject of the formula.
y = 2x + 6
Two lines are said to be parallel if they have the same slope , the slope of the first equation of line given is 2 , this means the slope of the equation of the line parallel to it is also 2.
Using the formula =
to calculate the equation , we have
y - 2 = 2 ( x - 0 )
y - 2 = 2x
Therefore :
-2x + y = 2 is the equation