Is 11.44 rational oh irrational

Solve the system of equations. y= 2x y= x^2 - 15

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

What is the solution of log2  (3x  -  7)  =  3? 4 5