Scale: 1 inch to 8 feet
actual area: 256 square feet
scale: 1 inch to 5 feet
actual area: 225 square feet
scale: 1 inch to 7 feet
actual area: 147 square feet
scale: 1 inch to 4 feet
actual area: 128 square feet
area of scale
drawing
scale and actual area
scale drawing area:
9 square inches
scale drawing area:
4 square inches
scale drawing area:
8 square inches
scale drawing area:
3 square inches

the answer is 844

step-by-step explanation:

it is 844 because if you add 836.50 + 7.5 you will get 844

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

answer: correct

step-by-step explanation: