Worth 80 points and make sure its right what is the slope of the line passing through the points (2, −5) and (4, 1)? −4/5 2 3 5/4

The slope is the change in Y over the change in X

(2, -5)  (4,1)

Change in Y = 1 - (-5) = 1+5 = 6

Change in X = 4 - 2 = 2

Slope = 6/2 = 3

Slope = 3

b.my answer is b.

brainliest

(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