Sammi had 19 marbles and bob gave him 1/7 of his marbles now Sammi has 27 how many marbles did bob have originally? pls help

What is 20+(5 x 2/5 )+ 3 show your work

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)