8. A scientist needs 20 liters of a 20% acid solution for an experiment, but she has only 10% solution and a 50% solution.
How many liters of the 10% and the 50% solutions should she mix
to get the solutions she needs?

What is the simplified form of x + 8/3x + 7 + x +7/x+4

An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18