Four less than the quotient of a number x and five

Aregular pentagon with a perimeter of 21 inches is dilated by a scale factor of 5/3 to create a new pentagon. what is the perimeter of the new pentagon?

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]