Which expressions are equivalent to -9x-21

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =