Use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following equation.
y=-2x + 7x+ 4
a. (1.75, -2.125)
c. (1.75, 10.125)
b. (1.75, 4)
d. (-1.75, 10.125)

answer: 10 meter

step-by-step explanation:

need details

(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

the answer is 54 sq. ft. i just did this question, on odyssey ware, and it was right. make brainliest.

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step-by-step explanation:

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