Aaron has $30. he wants to spend 2/5 of his money on comic books. how much does he want to spend?

7x+8y=-18, 4x-9y=-3 solve the system of equations

Solve 2^x=32 and rewrite this equation in a logarithmic form

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