A chemical company makes two brands of antifreeze. The first brand is 45% pure antifreeze, in the second brand is 70% pure antifreeze. in order to obtain 90 gallons of a mixture that contains 60% of pure antifreeze, how many gallons of each brand of antifreeze must be used?

No matter what I do, I cannot figure out this problem.

Based upon past experience, barry expects no overdrafts. he expects no 2nd copies of statements. barry estimates that he will use network atms about 5 times a month with either bank. barry decides in the end to choose eecu. assuming that both banks provide the necessary services equally well, and based upon the tables of fees given above, how much can barry reasonably expect to save annually by choosing eecu in this case over e-town bank? a. $72 b. $78 c. $144 d. $24

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?

Is it possible for brooke to draw a square and a rhombus that are congruent explain