Solve for x and y. Leave your answers exact (like in square root form, if possible). Do not use a calculator to approximate the value of x and y!

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

How many roots does the graphed polynomial function have? 1-02