9x + 6y= -30 change the equation to maje them in terms if y

1. what are the missing reasons in the proof 2. it's in the second picture and 3

What is true about the dilation? it is a reduction with a scale factor between 0 and 1. it is a reduction with a scale factor greater than 1. it is an enlargement with a scale factor between 0 and 1. it is an enlargement with a scale factor greater than 1.

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.