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Please help? Algebra 2? ASAP?
What is the 23rd term of the arithmetic sequence where a1 = 8 and a5 = 22?
A) 65
B) 77
C) 85
D) 97
What is the 32nd term of the arithmetic sequence where a1 = 14 and a13 = -58?
A) -178
B) -172
C) -166
D) -160
What is the 32nd term of the arithmetic sequence where a1 = -34 and a9 = -122?
A) -408
B) -397
C) -386
D) -375
2 Answers
- sahsjingLv 79 years agoFavorite Answer
1.
4d = 22-8 = 14
d = 3.5
a23 = a1+22d = 8+22*3.5 = 85
Answer: C
2.
12d = -58-14
d = -6
a32 = a1+31d = 14+31(-6) = -172
Answer: B
3.
8d = -122+34
d = -11
a32 = a1+31d = -34+31(-11) = -375
Answer: D
- Anonymous4 years ago
sparkling up for the two x or y in the two equation then plug what you get in the different equation for that comparable variable. as an occasion: a million.12x=3.sixty 4+a million.4y->divide the two factors by ability of a million.12 after which you get x=(3.sixty 4/a million.12)+(a million.4y/a million.12) (Sorry, i don't have a calculator). Plug that final equation in for x and then slove for y. once you sparkling up for y interior the precise equation plug it in in the different equation and locate x.