1. f(x) = 4x2 – 3x – 9 for x = 11
I
Therefore, f(11) =

Natasha spent 1 1/2 hours on the beach. she fell asleep for 3/4 of the time she was on the beach and then woke up with a terrible sunburn.how many hours was natasha asleep on the beach?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).