Area of a trapezoid: [(top +bottom)*height]/2
suppose the length of one base is x, then the other base is 5x-19
[(x+5x-19)*18]/2=477
[6x-19]*18=954
6x-19=53
6x=72
x=12
The longer base is 5*12-19=41
How I got my answer before was substitution!
First, multiply all fractions by 2.
3x-10/8x=52
Then multiply all sides by -10.
-30x + 8x = -520
-22x = -520
Divide both sides by -22.
x=23.6363
Answer:
Step-by-step explanation:
a = 8 and b = -4 a(a - b) ÷ (a + b)
A) -12
B) 8/3
C) 10
D) 24
ANSWER IS D) 24
