Mathematics, 09.07.2019 13:40 marcgtz511p3pln7

How do you solve 2x cubed + 3x squared -2x -3 = 0

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Answer from: khaz1430

4x + y = 3y = -4x + 32x + y = -5y = -2x - 52x + 3y = 9y = -2/3x + 33x + 4y = -8y = -3/4x - 24x - 2y = 10y = 2x - 5-6x + 4y = -8y = 3/2x - 24x - y = 3y = 4x - 33x - y = -8y = 3x + 82x - 4y = 4y = 1/2x - 12x - 5y = 15y = 2/5x - 3What is a rational number?Any number that can be written as a fraction.What is an irrational number?A number that goes on forever and has no pattern.How do you write a repeating decimal as a fraction?Put a 9 under the repeating digit. (One 9 for every repeating digit)What is a square root?When a number is multiplied by itself to make another number. Ex: The square root of 49 is 7, because 7*7=49What are the first 10 perfect squares?1, 4, 9, 16, 25, 36, 49, 64, 81, 100How do you multiply powers with the same base?Add the exponents and keep the base the same.How do you divide powers with the same base?Subtract the exponents and keep the base the same.What do you do with a negative exponent?Flip the number to the other side of the fraction and make the exponent positive.How do you raise a power to another power?Multiply the exponents.What is any number raised to the 0 power?1How do you find the slope of a line on a graph?Pick two points and find rise over run.How do you find the slope of two points?Find how much the y changes over how much the x changes.How do you find the slope of a table?Find how much the y changes over how much the x changes.When you write an equation in y=mx+b form, what does the m stand for?Slope

Answer from: Quest

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step-by-step explanation:

Answer from: Quest

(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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