We will have to use the formula for the area of a trapezoid on this problem, which is ( and are the bases of the trapezoid and is the height):
All we need to do is substitute the information we are given into our formula:
Now, let's just simplify the equation:
The missing base has a length of 13 units.
Answer:
x = -2
Step-by-step explanation:
3x + 2 = -2 + x Subtract x from both sides of the equation
2x + 2 = -2 Subtract 2 from both sides of the equation
2x = -4 Divide 2 from both sides of the equation
x = -2 <---- This is our answer
Hope it helped!