If C =s - 5 and D =s - 8, find an expression that equals C + 2D in standard form ​

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

The anwser cause i do not understand just plez