Which expression is equivalent to the given expression

You have 6 dollars +12 pennies +to quarters + 4 dimes=2 nickels how much do you have

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

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?