Estella saves some money each week. The graph shows the amount she has saved,
6
Amount Saved ($)
2
2 4 6 8 10 %
Weeks
Which table shows the information in the graph?
Weeks (x) 2 68
Weeks (X) 13 7
Amount
Amount
$1 $2 $3 $4
$1 $3 $5 57
Saved (y)
B Saved (y)
4
5
A
Weeks (X) 1 3 5 7
Amount
$2 $4 $6 $8
Saved (y)
Weeks (x) 2 4 6 8
Amount
Saved (y)
$2 $3 $4 $5
D

(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

mathpapa

step-by-step explanation: