There is a trapezoid that has an area of 25. If one of its bases is 4 and its other base is 6, what must its height be?

We know that formula to solve for the area of a trapezoid is A = (a+b) / 2+h. So, the formula to find the height would be 2*[A / (a+b) ].

2*[A / (a+b) ] Substitute the values for the variables

2*[25 / (6+4) ] Solve the parentheses

2 * (25/10)

2*2.5=5

The height must be 5.