Tim has a box of 15 markers. he gives 3 markers to 4 friends. what expression can show the number of markers tim has left?

Anna is no more than 3 years older than 2 times jamie’s age. jamie is at least 14 and anna is at most 35. which system of linear inequalities can be used to find the possible ages of anna, a, and jamie, j?

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Solve: 3x+y=6 4x-2y=18 show all work !