1. (9m+6)+(-5m-6)
my answer: 4m
2. (3r^2+7r+1)+(4r^2-8r-2)
my answer: 7r^2-r-1
3. (6h-1)-(9h+4)
my answer: -3h-3
4. (m^2-m-4)+(m-5)
my answer: m^2-9
5. (4x+4)+(3x+2+1)
my answer: 7x+7
Now this was book work for me so it doesn't have multiple choice, so are my answers correct?
1. (9m + 6) + (-5m - 6)
D; 4m
2. (3r^2 + 7r + 1) + (4r^2 - 8r - 2)
B; 7r^2 - r - 1
3. (6h + 1) - (9h + 4)
A; -3h - 3
4. (m^2 - m - 4) + (m - 5)
D; m^2 - 9
5. (4x + 4) + (3x + 2 + 1)
C; 7x + 7
YAY! I only go 1 wrong I'm getting better at this!! xD
THX Steve for your help~!
what question did you get wrong
Tysm, but 4 is actually C
To check if your answers are correct, let's simplify each expression step by step:
1. (9m + 6) + (-5m - 6)
Start by simplifying the parentheses within each pair of brackets:
9m + 6 - 5m - 6
Combine like terms:
(9m - 5m) + (6 - 6)
4m + 0
The simplified expression is: 4m
2. (3r^2 + 7r + 1) + (4r^2 - 8r - 2)
Simplify the parentheses within each pair of brackets:
3r^2 + 7r + 1 + 4r^2 - 8r - 2
Combine like terms:
(3r^2 + 4r^2) + (7r - 8r) + (1 - 2)
7r^2 - r - 1
The simplified expression is: 7r^2 - r - 1
3. (6h - 1) - (9h + 4)
Simplify the parentheses within each pair of brackets:
6h - 1 - 9h - 4
Combine like terms:
(6h - 9h) + (-1 - 4)
-3h - 5
The simplified expression is: -3h - 5
4. (m^2 - m - 4) + (m - 5)
Simplify the parentheses within each pair of brackets:
m^2 - m - 4 + m - 5
Combine like terms:
(m^2 + m) + (-m - 4 - 5)
m^2 - 9
The simplified expression is: m^2 - 9
5. (4x + 4) + (3x + 2 + 1)
Simplify the parentheses within each pair of brackets:
4x + 4 + 3x + 2 + 1
Combine like terms:
(4x + 3x) + (4 + 2 + 1)
7x + 7
The simplified expression is: 7x + 7
Based on simplifying each expression, your answers are correct! Well done!
#3: -3h-5
The others look ok