Answer:
h = 15
Explanation:
We can solve the blank angle in the triangle to start.
We know all triangles have an interior angle sum of 180, so we can use 180 - 38 - 25 to solve the blank angle. This gives us 117. Now, we can use this to solve the unknown. Because the blank angle and the equation angle are along a straight line, their angles will add up to 180 as well. 180 - 117 is 63, so 4h + 3 = 63.
To solve h, we start by subtracting 3, giving us 4h = 60. We can divide this next, to solve and isolate the variable, with h = 15.