Can someone please do this I NEED HELP The last one is 4y+ 3x+ 2z- 8

Rewrite the following quadratic functions in intercept or factored form. show your work. f(t) = 20t^2 + 14t - 12

Taylor wants to paint his rectangular deck that is 41 feet long and 24 feet wide. a gallon of paint covers about 350 square feet. how many gallons of paint will taylor need to cover the entire deck? round your answers to two decimal places when necessary.

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?