How do you solve even number between 300 and 400 it is divisible by both 5 and 9 how you solve it

Brent wants to know what is 5 x 1/2

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2

What is the following sum in simplest form? square root 8 + 3 square root 2 + square root 32