which algebraic expression is a polynomial with a degree of 5? 3x5 8x4y2 – 9x3y3 – 6y5 2xy4 4x2y3 – 6x3y2 – 7x4 8y6 y5 – 5xy3 7x2y2 – x3y – 6x4 –6xy5 5x2y3 – x3y2 2x2y3 – 3xy5

(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

sorry i got nothing

step-by-step explanation:

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