Which of the following is an arithmetic series with
5n? + In
the sum of the first n terms equal to (refer to photo)
A, 18 +13 + 8 +3 + + (23-5n)
B. 2+ 10 + 18 +26+ ... + (8n - 6)
c. 6+9+ 13 + 16+ + 3x + 3)
D.
6+ 11 + 16+ 21+ ... + (5 + 1)

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

your answer is 125y5