Help pls I need a good grade

Combine the like terms. Don’t forget when you add fractions you must have the same denominator

(3/4)a - (1/2)a + (1/2)a = (3/4)a
- because the (1/2)a cancels out leading back to the original number

(2/3)-(1/3) = 1/3

To put it all together your simplified expression would be (3/4)a + (1/3)

The answer is 26 to 1

This polygon has 4 sides
180(4-2) = 180(2) = 360 degree
80+90+2x + 3x = 360
170+5x = 360
5x = 190
x= 38
measure of angle t is 2(38)= 76
the answer is c. trust me
hope this !