10. When Raphael solved the system below by using the method of elimination, he changed the second equation to -8x - 2y =-2. What property justifies this manipulation?
8x + 3y = 7
4x + y =1

Complete the table for different values of x in the polynomial expression -7x2 + 32x + 240. then, determine the optimal price that the taco truck should sell its tacos for. assume whole dollar amounts for the tacos.

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)