The multiplication property of equality could be used to solve which of the following equations?
0-3+ y=7
0 (x+2)( x-3)=0
om +7= -12
ob+ (-2) = 18

a) what number, when added to negative four, is equal to negative five?

step-by-step explanation:

i dont know

step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

x = 3 ± √(5+y)