You just add the values for volunteers that worked 16-20 hours and 21-25 hours which would be 50 + 10 = 60. So the total number of volunteers that workers more than 15 hours is 60.
-13x=78
-13x/-13=78/-13
Answers: X=-6
Answer:
the answer to the questions are x, 4 and y=7
I believe the answer is b because u need to combine like terms and 6c+2c+5c is 13c.
If B is Jonas and his sister is 4 years older, that would be 4 plus B
