Answer:
The answer is C, the third one.
Answer:
x = 20 and they are vertical angles
Step-by-step explanation:
2x = 40
x = 20
Answer:

Step-by-step explanation:
The like terms are the ones containing the variable 'c'. They are combined by adding their coefficients.
Working just with the coefficients of c, we have ...

Then the simplified expression is ...
(2 3/4)c +(3 1/8)c +7
= (5 7/8)c +7
take the points and add 13 to them.
Basically substitute y into the first equation: 2x+8(2)=20 and solve. Then plug in x to the second equation etc.