Write an algebraic expression for the difference of 6 and 4 times a number x

Acoin bank containing only dimes and quarters has 12 more dimes than quarters. the total value of the coins is $11. how many quarters and dimes are in the coin bank?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

In the figure below, triangle rpq is similar to triangle rts. what is the distance between p and q? a. 24 b. 42 c.50 d. 54