You earn $50 per day for babysitting plus $0.75 per mile that she has to drive for an equation to represent the situation and define the variables

2a+7+4ahow many terms? how many variables? any like terms? yes noif yes, which ones? what are the coefficients? any constants? yes noif yes, which ones? simplify the expression by combining like terms and constants: how many terms now?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?