John can play 12 songs on the guitar and he learns 1 new song each week. Aiden can play 4 songs. but he learns 2 each week. How many weeks (w) will it be before Aiden knows as many songs as John?

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

What is the lcm of 16 and 40 ? 24 and 40 ?

Factor the polynomial, if possible. if the polynomial cannot be factored, write prime. 9n^3 + 27n^2 – 25n – 75