The sum of eight times a number and fifteen is seven. find the number. how do i work this out like these?

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

Which of the following values are in the range of the function graphed below? check all that apply ! - will give the answer "brainliest! "

Which rule describes the composition of transformations that maps △abc to △a”b”c