How do i solve 60a +55b= 2060

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

Deepak plotted these points on the number line. point a: –0.3 point b: – 3 4 point c: – 11 4 point d: –0.7 which point did he plot incorrectly?