which expression is equivalent to 9y - 1/2 (4y +20)? A. 11y - 10 H. 7y + 10 G. 7y - 10 J. 11y + 10

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

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

the answer is a beach is the best place to be

answer is c

step-by-step explanation:

81/12=324/x

x=48