The number of her correct answers is
(the total number of questions on the test) minus (20) .
The equation is y=(-1/2)x +2
A and D because they are both related unlike C and D.
Combine like terms on the right side of the equal sign:
7 - 3x = - 3x + 7
You can rearrange the right side to be:
7 - 3x = 7 - 3x
Because are the same thing, your answer ends up being all real numbers or infinitely many solutions. This means whatever number you plug in for the x-variable, the two sides will always be equal to each other.
Word Problem: There are 36 students in all. The teacher wants to make 4 groups. How much students go into each group?
Work: 36/4 = 9
Answer: 9 students go into each group
hope this helps
