Subtract a on both sides:
d - a = fx
Divide f on both sides:
(d - a) / f = x
x = (d - a) / f
Assuming the tank of water started at 0 gallons the technician needs to empty 15 more gallons from the tank
Question 1:Angle D and angle E are congruent because they are alternate interior angles. Let's make an equation.

Use the distributive property

Add both sides by 10 and subtract both sides by x


Plus this in and you get 20 for both of them (they're supposed to be congruent).
Your answer is the first choice.
Question 2:Use the sine. The sine is the opposite leg divided by the hypotenuse. Divide the sine from 400 to get our answer.

Your answer is the third choice.
Question 3:Use the tangent. The tangent is the opposite side divided by the adjacent. Divide 203 by the tangent of 22 degrees.

Your answer is the third choice. I hope this helps! :)
Is 37% Ran to hide then 63% refuse to hide
63/2520= 37/X
63x= 93240
Divide by 63
X= 1480 Ran to hide
2520+1480=4,000 total --------------
4,000 people lived in the forest