Let the width be w, then the length is 2w - 2.5.
Perimeter = 2(length + width)
40.6 = 2(2w - 2.5 + w) = 2(3w - 2.5)
3w - 2.5 = 40.6/2 = 20.3
3w = 20.3 + 2.5 = 22.8
w = 22.8/3 = 7.6
Therefore, width is 7.6 cm.
Area of a right triangle is 1/2 x height x base
The area of the first triangle is 1/2 x 12 x 15 = 90 square cm.
The area of the other triangle is 90 and one side is 18:
90 = 1/2 x 18 x S
Multiply both sides by 2:
180 = 18 x S
Divide both sides by 18:
S = 180/18
S = 10
The length of the other side is 10 centimeters
Answer:
D) 
Step-by-step explanation:
All number of years equal the amount when plugged in
