Posted by **Charlotte** on Thursday, September 19, 2013 at 6:05pm.

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% -
**Graham**, Thursday, September 19, 2013 at 6:08pm
Answer 1. is correct

Answer 2. is correct

Answer 3. is correct

Answer 4. is _wrong_

- Math help Ms. Sue please -
**Ms. Sue**, Thursday, September 19, 2013 at 6:11pm
I don't know 1 and 4.

2 and 3 are right.

- Math help Ms. Sue please -
**Charlotte**, Thursday, September 19, 2013 at 6:14pm
Ok thanks Graham and Mrs.Sue!

So is #4

2/9x-1/3 ?

- Math help Ms. Sue please -
**Graham**, Thursday, September 19, 2013 at 6:15pm
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 -
**Charlotte**, Thursday, September 19, 2013 at 6:22pm
Ok thank you for your time

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