Which number sentence shows the associative property of addition? choose all that apply.

a.(12 + 3) + 4 = 12 + (3 + 4)

b.11z + 9p = 9p + 11z

c.2(4 · 3x) = (2 · 4)(3x)

d.7 + (11 + 8) = (7 + 11) + 8

answer: the value of x is 7cm

step-by-step explanation:

answer:

125 yards

explanation:

75+50=125. that is my answer

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

rotation point l

step-by-step explanation: