The sum of 15x^2 + 3x - 4 and 5x - 4 is..?

15x^2 + 8x - 8

Step-by-step explanation:

1) Add them together

(15x^2 + 3x - 4) + (5x - 4)

2) Combine like terms

15x^2 + 8x - 8

15x^2+8x-8

Step-by-step explanation:

when asking for the sum of 2 polynomials, the question is simply asking you to add like terms

15x^2 (nothing to add so this stays the same)

3x+5x=8x

-4+(-4)=-8

add the bolded terms to get

15x^2+8x-8

correct answer is infinitely many solutions

step-by-step explanation:

2(2x + 3) = -4 + 2(2x + 5)

solving the above equation:

4x + 6 = -4 +4x +10

combining like terms

4x -4x = -4+10-6

0=0

since both sides are 0=0, we end up into true statement it means it has infinite many solutions.

so correct answer is infinitely many solutions

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: