The equation a + b + c = 180 describes the sum of the angles in a triangle a) Use this formula to find the values of a, b and c when b = 3a and c = 5a​

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

the first domain and range set to the left is matched with the top relation, and the second set the set in the middle goes with the bottom relation.