The equation 10x + 12 = $72.00 shows the total cost for x people attending a concert. how many people attended the concert

a) 4 people
b) 5 people
c) 6 people
d) 8 people

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

the answer is 96 degrees

step-by-step explanation:

you have to realize that a line equals 180 degrees