How many tens in 8000

Combined megan and kelly worked 60 hours.kelly worked twice as many hours as megan.how many hours did they each worked?

The table shows values for functions f(x) and g(x) . x f(x)=3x g(x)=2x+1 −2 19 −3 −1 13 −1 0 1 1 1 3 3 2 9 5 what is the solution to f(x)=g(x) ? select each correct answer.

Explain how you can use the associative property to evaluate (7x50)x4.