I need help with solving a system of equations using elimination

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?