The difference of 3 times a number x and y is equal to -4. 2 times the number x plus 2 times
the number y is equal to 72. Find the numbers.

Solve by the process of elimination

your answer is b ^w^ hope i

-4

step-by-step explanation:

do 6-10=

if u need it to be negative.

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