How do you work this problem (21÷7)×4=
is this correct?
3×4=12

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

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)

Percy rides his bike 11.2 miles in 1.4 hours at a constant rate. write an equation to represent the proportional relationship between the number of hours percy rides, x, and the distance in miles, y, that he travels.