5.8-0.9x <=19.3need help with steps and answer

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Nine more than four times a number is the same as one less than twice the number. find the number?

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?