Ascientist wants a 45 milliliter saline solution with a concentration of 11%. she has concentrations of 7% and 19%. how much of each solution must she use to get the desired concentration?

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth

Fa bus driver leaves her first stop by 7: 00 a.m., her route will take less than 37 minutes. if she leaves after 7: 00 a.m., she estimates that the same route will take no less than 42 minutes. which inequality represents the time it takes to drive the route, r?