Factorise fully 77x-33x^2

What are the relative frequencies, to the nearest hundredth, of the rows of the two-way table? group 1: a 15 b 45 group 2: a 20 b 25

Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)