To celebrate the first day of school, lucy brought in a tray of caramel brownies and walnuts brownies. she brought 70 brownies in all. 42 of the brownies were caramel. what percentage of the brownies were caramel?

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

If the discriminant if a quadratic equation is 4 which statement describes the roots?

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22