How do i find the exact product of 379 & 8?

What is the value of this expression when b= 5 6 (2b-4)

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

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).