First Answer and Last Answer are correct.
The two middle should be reconsidered, you can't really tell if they are technically Perpendicular.
So the correct answer should be "Can't be determined" for the middle two.
Answer:
x=-39
Step-by-step explanation:
Been a bit since i’ve done this kind of problem.
X+4=20
X is the number of hours needed to work, while 4 is the hours already there.
Answer:
x = 4 and y = 1
Step-by-step explanation:
3x+2y=14
2x-4y=4
We can solve them by canceling out one variable so we only have one variable left. Let's cancel out y by doubling the first equation. We get:
6x + 4y = 28
add that on to the second one and we get:
8x = 32
x = 4
We plug in x and get that:
y = 1
So in the end we get
x = 4 and y = 1
