Answer:
3.68 inches × 77.28 inches
Step-by-step explanation:
Given that,
The perimeter of a rectangle is 162 inches.
Let the width is b.
ATQ,
Length = 7 times than 3 times the width
l = 7(3b) = 21b ...(1)
The perimeter of a rectangle is given by :
P = 2(l+b)
Put all the values,
162 = 2(21b+b)
81 = 22b
b = 3.68 inches
Put the value of b in equation (1)
l = 21b
= 21 (3.68)
= 77.28 inches
Hence, the dimensions of the rectangle are 3.68 inches × 77.28 inches
Answer:
m = 15
Step-by-step explanation:
10m = 10 - 5(m-7)
multiply -5 into the parenthesis
10m = 10 - 5m + 35
add like terms
10m = -5m + 45
add five 5 to both sides
15m = 45
divide by 15 on both sides to isolate m
m = 15
You would have to divide 15 by 20 (15 ÷ 20)
15 ÷ 20 = 0.75
You'd have to do the long division out on paper.