algebra

posted by lee

Could someone check my work;
1. Generate the first five terms in the sequence using the explicit formula.

yn = –5n – 5

–30, –25, –20, –15, –10
30, 25, 20, 15, 10
–10, –15, –20, –25, –30(my answer)
10, 15, 20, 25, 30

2. What is the 15th term in the sequence using the given formula?

cn = 3n – 1

14
57
44
–44(my choice)

3. Write a recursive formula for the sequence 7, 13, 19, 25, 31, ... Then find the next term.

an = an– 1 + 6, where a1 = 7; 37(my choice)
an = an– 1 + 6, where a1 = 37; 7
an = an– 1 – 6, where a1 = 6; –23
an = an– 1 – 6, where a1 = 7; –8

4. Write a recursive formula for the sequence 7, 4, 1, –2, –5, .... Then find the next term.

an = an–1 – 3, where a1 = –8; 7
an = an–1 – 3, where a1 = 7; –8(my answer)
an = an–1 + 3, where a1 = –3; 22
an = an–1 + 3, where a1 = 7; –8

5. Write an explicit formula for the sequence 8, 6, 4, 2, 0, ... Then find a14.

an = –2n + 10; –16
an = –2n + 8; –18
an = –2n + 8; –20
an = –2n + 10; –18
Dont understand this problem.

  1. Reiny

    your first four are correct

    #5.
    In the explicit formula, you can find any term directly , unlike a recursive, where you have to know the previous term

    so if n = 1, we should get 8 from the formula
    look at the first and last
    the both give you
    a(1) = -2(1) = 10 = 8
    a(14) = -2(14) + 10 = -28+10= -18
    so it has to be the last one.

  2. a

    Multiple Choice
    1. Generate the first five terms in the sequence using the explicit formula.

    yn = –5n – 5 (1 point)
    (0 pts) –30, –25, –20, –15, –10
    (0 pts) 30, 25, 20, 15, 10
    (1 pt) –10, –15, –20, –25, –30
    (0 pts) 10, 15, 20, 25, 30
    1 /1 point
    2. What is the 15th term in the sequence using the given formula?

    cn = 3n – 1 (1 point)
    (0 pts) 14
    (0 pts) 57
    (1 pt) 44
    (0 pts) –44
    0 /1 point
    3. Write a recursive formula for the sequence 7, 13, 19, 25, 31, ... Then find the next term. (1 point)
    (1 pt) an = an– 1 + 6, where a1 = 7; 37
    (0 pts) an = an– 1 + 6, where a1 = 37; 7
    (0 pts) an = an– 1 – 6, where a1 = 6; –23
    (0 pts) an = an– 1 – 6, where a1 = 7; –8
    1 /1 point
    4. Write a recursive formula for the sequence 7, 4, 1, –2, –5, .... Then find the next term. (1 point)
    (0 pts) an = an–1 – 3, where a1 = –8; 7
    (1 pt) an = an–1 – 3, where a1 = 7; –8
    (0 pts) an = an–1 + 3, where a1 = –3; 22
    (0 pts) an = an–1 + 3, where a1 = 7; –8
    1 /1 point
    5. Write an explicit formula for the sequence 8, 6, 4, 2, 0, ... Then find a14. (1 point)
    (0 pts) an = –2n + 10; –16
    (0 pts) an = –2n + 8; –18
    (0 pts) an = –2n + 8; –20
    (1 pt) an = –2n + 10; –18
    1 /1 point

  3. Potato

    ^^

  4. bob

    ^^

  5. Becky

    ^^^^100%^^^^

  6. Joe

    You are a godsend
    For everyone else:
    C
    C
    A
    B
    D

  7. Tom

    Much love

  8. booty hunter

    c c b a a c

  9. YEET

    booty hunter is WRONG XD

  10. booter hunter=liar

    yet booty hunter lies

  11. booty hunter is gay

    Why would you attempt to give wrong answers when there is multiple people saying that other was correct? People are hella f**cing dumb.

  12. Pickle

    Lol, you all talk like ur in middle school xD jus ignore the wrong answers

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