Answer:
c = 72
Step-by-step explanation:
multiply both sides of the equation by 8 to eliminate the fraction
c = 8 × 9 = 72
note that 
= 9
Addition property of equality
Answer:
28+12x
Step-by-step explanation:
The perimeter of a square is 4s where s is the side lenght. In your case s is 7+3x so the perimeter will be (28+12x).
Answer:
A.3
Step-by-step explanation:
Since the lines are parallel that angle is 90 same as the other. So you plug in all your answers to see with one gives you 90 that being 3 because 30(3)=90.
The answer will be 1 13/18
It is because you will have to change the mixed number into a improperfaction that will turn into 23/9 -5/6. Then you will need to change the denominator to the same number you can change it into 18. 46/18-15-18= 31/18= 1 13/18
