Math

Check my answers please!

1.
6x + 29 = 5

A. -4 ***
B. -18
C. 204
D. -144

2.
Combine like terms:

-21a + 16a

A. -5a ***
B. 5a
C. 37a
D. -37a

3.
Simplify.
9a - b - 2a - 10b

A. -7a + 11b
B. 11a + 9b
C. -11a - 9b ***
D. 7a - 11b

4.
Simplify.
5(x + 10) + x

A. 6x + 15
B. 5x + 15 ***
C. 6x + 50
D. 4x - 50

5.
Solve.
-4n + 7 + 2n = 1

A. 1
B. 3 ***
C. -3
D. 4

6.
Solve.
4(y - 4) = 8

A. -2
B. 2
C. 4
D. 6 ***

7.
Raymond buys bottles of water at $2.10 each and a large pizza at $12.99. The total cost was $21.39. How many bottles of water, b, did he buy?

A. 2.10b + 12.99 = 21.39; 4 bottles
B. 2.10 + 12.99b = 21.39; 4 bottles
C. 2.10c = 21.39 + 12.99; 6 bottles
D. 21.39 - 2.10b = 12.99; 16 bottles

My answer: Either A. or B., I think B

  1. 👍
  2. 👎
  3. 👁
  1. 1, yes
    2. yes
    3. No !!!
    4. No! 5(x + 10) + x = 5 x + 50 + 1 x = 6 x + 50

    1. 👍
    2. 👎
  2. 3, 4, and 5 are wrong.

    7. He bought four bottles at 2.10 per bottle.

    1, 2, and 6 are right.

    1. 👍
    2. 👎
    👤
    Ms. Sue
  3. 5. yes
    6. yes
    7. 2.1 x + 12.99 = 21.39
    2.1 x = 8.4
    x = 4

    1. 👍
    2. 👎
  4. I goofed. Damon is right. 5 is correct.

    1. 👍
    2. 👎
    👤
    Ms. Sue
  5. 5.
    Solve.
    umber 5

    -4n + 7 + 2n = 1
    -2 n = -6
    n = 3
    I agree it is B

    A. 1
    B. 3 ***
    C. -3
    D. 4

    1. 👍
    2. 👎
  6. For 3 - D? Since 9a - 2a is 7. It would either be A. or D.

    For 4 - A?

    For 5- A?

    1. 👍
    2. 👎
  7. Okay dang, I didn't see the other comments you guys posted, let me read them haha

    1. 👍
    2. 👎

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