Answer:
a = 7
Step-by-step explanation:
You have correctly found the perimeter of the figure to be (34a+12). To find the value of 'a', solve the equation that sets this equal to 250.
34a +12 = 250
34a = 238 . . . . . . . subtract 12
a = 238/34 = 7 . . . . . divide by the coefficient of 'a'
The value of "a" is 7.
