Which of the following is equal to 105×5 ?

A. (100+5) + (5+5)

B. (100+5) × (5+5)

C. (100×5) × (5×5)

D. (100×5) + (5×5)

D

Step-by-step explanation:

105 x 5 = 525

A. (100+5) + (5+5) = 105 + 10 = 115 (no)

B. (100+5) × (5+5) = 105 x 10 = 1050 (no)

C. (100×5) × (5×5) = 500 * 25 = 12500 (no)

D. (100×5) + (5×5) = 500 + 25 = 525 (yes)

50- 250 is correct i did that one too

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