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Math help Ms. Sue please

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1. What is the simplified form of the expression?

7m^2 + 6.5n - 4n + 2.5m^2 - n

9.5m^2 + 1.5n
4.5m^2 + 1.5n
1.5m^2 - 4.2n
9.5m^2 - 1.5n

2. What is the sum?

9/4 + (-1/5)

41/20
-41/20
-1/3
8/20

3. Order the following numbers from least to greatest.

√7, -2.3, √3, 5.1, -1/3

√7, -2.3, -1/3, √3, 5.1
-2.3, -1/3, √3, √7, 5.1
-2.3, -1/3, 5.1, √3, √7
√3, √7, -1/3, -2.3, 5.1

4. What sum or difference is equivalent to the expression?

3x - 2/9

1/3x-2/9
2/9x-1/3
1/9x
2/9

My answers:
1. 9.5m^2 + 1.5n
2. 41/20
3. -2.3, -1/3, √3, √7, 5.1
4. 1/9x

  • Math 75% -

    Answer 1. is correct
    Answer 2. is correct
    Answer 3. is correct
    Answer 4. is _wrong_

  • Math help Ms. Sue please -

    I don't know 1 and 4.

    2 and 3 are right.

  • Math help Ms. Sue please -

    Ok thanks Graham and Mrs.Sue!

    So is #4

    2/9x-1/3 ?

  • Math help Ms. Sue please -

    The answer to 1 and 4 is to rearrange to collect like terms.


    I suspect _Question_ 4 is wrong.
    3x - 2/9
    was probably meant to be :
    (3x-2)/9

  • Math help Ms. Sue please -

    Ok thank you for your time

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