Which runner set the fastest pace? explain.

Um... you can't see what you need to solve the problem in the picture. Take a picture of the chart.

Idk the answer but the table says 20 laps to 32 min and 16 laps to 25 min also it says 17 laps to 27.2 mins.

Step-by-step explanation:

Martha:20 laps to 32 min

Allison:16 Laps to 25 min

Rachel:17 Laps to 27.2 min

(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