Help with this please a lot i need it

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.

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Solve the equation by completing the square. x^2+2x=17