Which of the following are solutions to the equation below?
Check all that apply.
x²+x-20=0
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A. -5
B. 4
C. -20
D. -4
E. 5

x = 4 and x = -5

Step-by-step explanation:

Substitue the values of the equation into the quadratic formula, and solve to find x. Since x is a square number it will have 2 values; one positive and one negative.

A. -5         and     B. 4

Step-by-step explanation:

x²+x-20=0

This is a quadratic equation that, it can be solve through factorization method, formula or completing the square method. We will be using factorization method to solve.

First, we will find two numbers such that its product will give  -20  and its sum will give 1.

The number is 5 and -4.

The product of 5 and -4 will give -20   and the sum of 5 and -4 will give 1.

The next step is to replace x by 5x-4x in the quadratic equation.

x²+5x - 4x-20=0

(x²+5x) (- 4x-20)=0

In the first parenthesis, we will factor out x since it is common while in the second parenthesis, we will factor out -4 since it is common.

x(x+5) -4(x+ 5) = 0

(x+5)(x-4) = 0

x + 5 =0     or   x-4 =0

x = -5   or   x=4

x = -5 or 4

Therefore the solution is -5 or  4

answer: input the dimensions of the room to be painted. click the button to calculate the amount of paint and man-hours needed for this job.

interior paint coverage depends on the brand of paint used. the coverage amount is listed on the label of the paint can. use this to adjust the values in the paint coverage section below. paint usually is applied at 350 to 400 square feet per gallon (primer at 200 to 300 square feet per gallon).

step-by-step explanation:

constant of proportionality = 3 and the equation is c = 3p.

step-by-step explanation:

c = kp   where c = amount of caffeine in mg., p = oz of pepsi and k is the constant of proportionality.

substituting the values given:

24 = 8k

k = 3.

the same value of k will be obtained if we substitute the other given values.