Find three consecutive integer who’s sum is 552

Here we will use algebra to find three consecutive integers whose sum is 552.

We assign X to the first integer. Since they are consecutive, it means that the 2nd number will be X+1 and the third number will be X+2 and they should all add up to 552. Therefore, you can write the equation as follows:

To solve for X, you first add the integers together and the X variables together. Then you subtract 3 from each side, followed by dividing by 3 on each side. Here is the work to show our math:

Which means that the first number is 183, the second number is 183+1 and third number is 183+2. Therefore, three consecutive integers that add up to 552 are:

183

184

185

Since, 183 + 184 + 185 = 552, it confirms that the answer above is correct.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!