If gas costs $3.50 per gallon, how many whole gallons of gas could you buy with $45.00

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions. a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0