Answer:
200
Step-by-step explanation:
37+3=40
40×5=200
Write that down
I think the person who answered above is right
Answer: B 2x
1/2x-3+3/2x+3
Answer:
see explanation
Step-by-step explanation:
Given A is directly proportional to r² then the equation relating them is
A = kr² ← k is the constant of proportion
To find k use the condition when r = 5, A = 75 , then
75 = k × 5² = 25k ( divide both sides by 25 )
3 = k
A = 3r² ← equation of proportion
(a)
when r = 4, then
A = 3 × 4² = 3 × 16 = 48
(b)
when A = 147 , then
147 = 3r² ( divide both sides by 3 )
49 = r² ( take the square root of both sides )
r = = 7
It is false that the area of a person's yard can be measured in cubic feet. It is always measured in square feet, because cubic feet add another dimension, which is height, and height is not measured in a yard.