3d-4 when d=1.2

Please help its homework

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8

I’m really confused and need to learn this

Ellie spent $88.79 at the computer stote. she had $44.50 left to buy a cool hat. how much money did she originally have? write and solve an equation to answer the question.