I will brainlist who can answer this 2 question! Determine whether each linear system has one solution, no solution, or an infinite number of solutions.

Can someone pls ! pls answer all. no explanation needed..

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).

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2