What is the cost of a 4 mile taxi ride if the charges Is $2.50 to start plus $2.80 per mile

Anyone know? will mark brainliest if you're correct!

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).