Answer:
125.5
Step-by-step explanation:
I made the shape in to 2 seperate shapes
the rectangle:8 times 10 is 80
Trapezoid: A=a+b/2(h)
3+10/2(7) is 45.5
so 80+45.5= 125.5
Answer:
A. 12
Step-by-step explanation:
Answer:
5.7
Step-by-step explanation:
The altitude of a right triangle divides it into two smaller triangles, all three of which are similar.
ΔABC ~ ΔADB ~ ΔBDC
Writing and solving a proportion:
AD / BD = BD / CD
(x + 3) / 5 = 5 / (2x + 3)
(x + 3) (2x + 3) = 25
2x² + 9x + 9 = 25
2x² + 9x − 16 = 0
x = [ -9 ± √(81 − 4(2)(-16)) ] / 2(2)
x = [ -9 ± √(81 + 128) ] / 4
x = (-9 ± √209) / 4
x = -5.86 or 1.36
Since x can't be -5.86, x = 1.36. So the length of CD is:
CD = 2(1.36) + 3
CD = 5.7
<h2>THREE</h2><h2></h2><h3>Solved in two seconds.</h3><h3>22 - 10 = 12</h3><h3>12 ÷ 4 = 3</h3><h3>Literally just reversed it.</h3>