Find the value(s) of k that will cause the equation 4x^2+kx+4=0 to have zero real solutions, one real solution, and two real solutions

Which is an equation for the nth terms of the sequence 12,15,18,21

The level of co2 emissions, f(x), in metric tons, from the town of fairfax x years after they started recording is shown in the table below. x 2 4 6 8 10 f(x) 26,460 29,172.15 32,162.29 35,458.93 39,093.47 select the true statement.

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?