F(x) = x^2 − 8x
write the quadratic equation in standard form

The late fee for library books is $2.00 plus 15¢ each day for a book that is late. if maria’s fee for a late book was $3.20, write and solve a linear equation to find how many days late the book was.

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

The area of a circle is equal to 1 dm². find the radius of the circle.