What is the value of y?

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

What is the value of the discrimination for the quadratic equation 0=×2+2+×2

Alexandra drove from michigan to colorado to visit her friend. the speed limit on the highway is 70 miles per hour. if alexandra's combined driving time for the trip was 14 hours how many miles did alejandra drive?