Math help help please make ight now (3x^2+2x+1)-(x^2-3x+4)
Steps :
(3x^2+2x+1)-(x^2-3x+4)
3x^2+2x+1-x^2-3x+4
3x^2-x^2+2x-3x+1+4
2x^2-x+5

Mr. William is incorrect. He did not distribute the subtraction sign correctly.

Step-by-step explanation:

(3x^2+2x+1)-(x^2-3x+4)

3x^2+2x+1-x^2-3x+4

It's supposed to be, -x^2+3x-4 because you have to distribute the negative sign.

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15