Answer:
x = 9
Step-by-step explanation:
60 + 6x + 16 = 13x + 13
6x - 13x = 13 - 16 - 60
- 7x = - 63
- x = - 63/7
- x = - 9
x = 9
For this case we have a relationship of the form:

There are 70 children on the field trip
Therefore, we must replace the value of c = 70 in the equation.
We have then:

Clearing t, we have:
Answer:
there are 15 teachers on the trip
#2 Is Complementary because angle 1 and 2 are equal to 90 degrees
#4 Is Adjacent. That mean front he middle point/vertex both angles are on the same side and don’t over lap.
To finish the rest i have some notes.