PLEASE HELP, WILL GIVE BRAINLIEST!! Determine the solution and the reasoning that justifies the solution to the systems of equations. (4 points)
0 (-4, 6), because both the equations are true for this point
(2,8), because the graph of the two equations intersects at this point
(2, 8), because neither of the two equations are true for this coordinate point
(-4, 6), because the graph of the two equations intersects the axis at these points

(2,8), because the graph of the two equations intersects at this point.

Step-by-step explanation: Got u. it's right 1000%

(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

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