Can you check these problems?
1. 4x^2 + 3x - 4x +5
= 4x^2 - x + 5
2. m - n + m - n - n
= 2m - 3n
3. (7x + 5 - 3y) - (-3x - 5 +4y)
= 7x + 3x -3y + 4y + 0
= 10x - y = 0
4. m/8 - 9 = 5
m/8 = 5 + 9
m = 14/8
m = 7/4 = 1 3/4
For #4 should be:
m/8 = 5 +9
m/8 = 14
m = 14*8
m = 112/8
sorry, typo on #4 still. answer is just 112
For the 3rd should be:
=7x + 5 - 3y + 3x + 5 - 4y
=10x -7y + 10
Thanks!!
Let's go through each problem and check the solutions:
1. 4x^2 + 3x - 4x + 5
To simplify this expression, we combine like terms. The terms "3x" and "-4x" can be combined since they have the same variable, x.
= 4x^2 - x + 5
2. m - n + m - n - n
Again, we combine like terms. The terms "m" and "m" can be added together, and the terms "-n", "-n", "-n" can be combined as well.
= 2m - 3n
3. (7x + 5 - 3y) - (-3x - 5 + 4y)
To simplify this expression, we distribute the negative sign inside the parentheses by changing the signs of each term inside.
= 7x + 5 - 3y + 3x + 5 - 4y
Next, we combine like terms. The terms "7x" and "3x" can be added together, and the terms "-3y" and "-4y" can also be combined.
= 10x - y
4. m/8 - 9 = 5
To isolate the variable, m, we need to perform the inverse operation. In this case, we add 9 to both sides of the equation to cancel out the -9.
m/8 - 9 + 9 = 5 + 9
Simplifying further:
m/8 = 14
To solve for m, we multiply both sides of the equation by 8 to cancel out the division by 8.
8 * (m/8) = 14 * 8
m = 112/8
Simplifying the fraction:
m = 14
So, the solutions are:
1. 4x^2 - x + 5
2. 2m - 3n
3. 10x - y
4. m = 14