If a* b= 0 then what do we know about a and or b

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

In which form is the following function written? y = - 2(x – 3)(x + 5)

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20