Answer:
Lewis can paint 320 square yards.
Step-by-step explanation:
1 quart covers 80 square yards
8 x 10=80
4 quarts covers 320 square yards
80 x 4=320
Answer:
x=10
Step-by-step explanation:
40= 3x+10 (it equals 40 because of vertical angles)
The third option, 68 degrees
Answer:
![\left(3x^3+2x-3\right)-\left(4x^3-x^2+x\right)=-x^3+x^2+x-3\\\mathrm{Remove\:parentheses}:\quad \left(a\right)=a\\3x^3+2x-3-\left(4x^3-x^2+x\right)\\3x^3+2x-3-4x^3+x^2-x\\-x^3+x^2+x-3](https://tex.z-dn.net/?f=%5Cleft%283x%5E3%2B2x-3%5Cright%29-%5Cleft%284x%5E3-x%5E2%2Bx%5Cright%29%3D-x%5E3%2Bx%5E2%2Bx-3%5C%5C%5Cmathrm%7BRemove%5C%3Aparentheses%7D%3A%5Cquad%20%5Cleft%28a%5Cright%29%3Da%5C%5C3x%5E3%2B2x-3-%5Cleft%284x%5E3-x%5E2%2Bx%5Cright%29%5C%5C3x%5E3%2B2x-3-4x%5E3%2Bx%5E2-x%5C%5C-x%5E3%2Bx%5E2%2Bx-3)
I hope this is good enough:
we are given the equation 3y = -7x - 18 and is asked whether y is directly proportional to x and if it is, we find the constant of variation. In this case, we simplify the equation into y = -7/3 x -6. In this case, we can see that y is proportional to x with a constant of proportionality of -7/3