Explain the significance of the equation 100x -2y+ 400 = 0 which represents the hourly cost of a car repair.

The significance is that it is how much you will pay for the total repair which will help you know how much money you will spend.

Step-by-step explanation:

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

susie has 7 apples