<span>Solve for "x":
a/x = x/4a
---
x^2 = 4a^2
x = 2a</span>
-7x -7y = 21
Y = 6
Since they are giving you the value of 6 you just plug it in the equation
-7x - 7(6) = 21
-7x - 42 = 21
+ 42. +42
-7x = 63
/-7. /-7
X = -9
tan 44 = h/ x
x = 15 ft * sin 26
so
h = x * tan 44
= (15 ft * sin 26) (tan 44 )
so the anser is D
hope this would help you