Mario paid $30 to activate his cellular phone plus $50 per month. Type an equation: * y=50x + 30

Carlos paid $70 to activate his cellular phone plus $30 per month. Type an equation: *

y=30x+70

Mario and Carlos use their cellular phones for 4 months. Who pays more? *
plz help me i beg anyone

Which graph corresponds to the function f(x) = x2 + 4x – 1?

Which of the following is the result of expanding the series

How does the graph of g(x)=⌊x⌋−3 differ from the graph of f(x)=⌊x⌋? the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted right 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted up 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted down 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted left 3 units.