Math help Ms. Sue please
posted by Charlotte on .
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
1/3x2/9
2/9x1/3
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

Answer 1. is correct
Answer 2. is correct
Answer 3. is correct
Answer 4. is _wrong_ 
I don't know 1 and 4.
2 and 3 are right. 
Ok thanks Graham and Mrs.Sue!
So is #4
2/9x1/3 ? 
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 :
(3x2)/9 
Ok thank you for your time