Answer:
50
Step-by-step explanation:
6m-n
Let m = 9 and n = 4
6*9-4
Multiply first
54-4
Then subtract
50
Substitute y = 2x + 3 into y = -x - 9
2x + 3 = -x - 9
Solve for x in 2x + 3 = - - 9
x = -4
Substitute x = -4 into y = 2x + 3
y = -5
Therefore,
<u>x = -4</u>
<u>y = -5</u>
Answer:
13 students
Step-by-step explanation:
At least 30 and fewer than 67 makes it 30-66
So,
30-66 => 13 students
Multiply the factors together. You should get the original expression.
For example, if we are to factor
2x^2 + 4x
we would factor as
2x(x + 2).
Check this by multiplying back in
2x*x + 2x*2 = 2x^2 + 4x
which is what we started with, so we know we are correct.