We have a pair of vertical angles here. So they would equal each other.
3x+50=6x-10
Subtract 3x to 6x:
50=3x-10
Add 10 to 50:
60=3x
Divide 3 to both sides:
x=30
Answer: 10 students in each group
Step-by-step explanation: Add 90 + 60 which is 150
Divide 150 by 15 to find out the amount of students in each group.
150 divided by 15 is 10.
Juanita did make an error, she should have combined -4 and -5 to make -9
Answer:
b
Step-by-step explanation:
So all you really need to do is to substitute the value of x into the equation so like the 1st one will look like this:

Those would be the right column for the f(x) values
Now do the same for g(x)

You will notice that when x = -1, g(x) = f(x)