Is the coronavirus really affecting us all

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.