Follow the steps and finish the solution. 7 (x minus 3) = 28 Distributive property: 7 x minus 21 = 28. Addition property of equality: 7 x = 49. Division property of equality: x = blank. What is the value of x?

7

Step-by-step explanation:

7(x - 3) = 28                 Given

7x - 21 = 28                  Distributive property

7x - 21 + 21 = 28 + 21   Addition property of equality

7x = 49                         Division Property of equality

7x/7=49/7                  

x = 7

12.5 feet

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