Look here https://www.varsitytutors.com/algebra_1-help/how-to-find-the-nth-term-of-an-arithmetic-sequence
Answer:
8
Step-by-step explanation:
51 + 4x + 7 = 90 - combine like terms
58 + 4x = 90 - subtract 58 from each side
4x = 32 - divide both sides by 4
x = 8
To find a number in between you could multiply 39/130 by 2/2
and 40/130 by 2/2 to get
78/260 and 80/260
So you have to find 15 percent of 900 which would be 135
Eliminate A immediately, because "367,259 < 364,798" is false.
Elim. C because "367,313 < 367,259" is false.
Thus, B is the correct answer.