-13.4 - 08.9 = ? I know I can use a calculator but is it really -22.3? I feel like it's wrong since my friends are saying so.

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?

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)

Can someone me with my math problem pls my teacher is on my back about this