A chemist has 30% and 50% solutions of acid available. How many liters of each solution should be mixed to obtain 55 liters of 34% acid solution?

Solve the equation x/4 - 5= -8 -27 -12 -7 12

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates