Twenty-one people in a room have an average height of 5 feet 6 inches. a 22nd person enters the room. how tall would he have to be to raise the average height by 1 inch?

Solve the problem by making up an equation. a child is 12 years old, and his father is 32 years older. in how many years will the age of the father be 3 times the age of the child?

Y=4x^2+x-1 solve using quadratic formula

My math teacher told my class to "steal" a 6th grade fraction word problem from the internet, word problems? : -p requirements: only a 1 step word problem. needs to be complex.