12 mL of a 5% solution. He also has a solution that has a concentration of 30%. How many mililiters of the 30% solution does Deon need to add to the 5% solution to obtain a 20% solutions? The answer is 18ml but I need the work I’ll make u the brainilest answer

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000

Acarton of juice contains 64 ounces miss wilson bought six cartons of juice how many ounces of juice did she buy