Substitute 2x + 3y = 5
x^2 + xy - 2y^2 = 10

Please help with this question

F(x) = (x^2 + 3x − 4) and g (x) = (x+4) find f/g and state the domain.

What is the distance between the points 4,10 and -3,-14 on the coordinate plane

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).