The answer is a.
When you are solving problems like this you would use the equation y^2=4ax. The x and Y would be the coordinates. Based on the equation you have given the coordinates would be (6,12) and (6,-12), (24 is split up evenly between the y-axis).
Then we go on to solve the equation by plugging in the numbers 12^2=4a(6)
144=24a
144/24=24a/24
6=a
There are also 6 possibilities because the die has six sides with 1 different number on each.
Im just going out on a wing here but is one options 40 + 45
To work this out, we must use the balancing method - whatever we do to one side, we do exactly the same to the other
-7 = e/3 + 14
(-14) (-14)
-7 - 14 = -21
-21 = e/3
(x3) (x3)
-21 x 3 = -63
-63 = e
e = -63
No it wouldn't because a direct variation is in a y=kx formula. That equation shown above is in a y=mx+b format,which is a formula for slope intercept form