Work. Do Not Solve

Multiple Choice

work. Do not solve.
-5x + 9y = -12
-4x - 4y = -32
A) Substitution B) Addition
Answer: B
Write the word or phrase that best completes each statement or answers the question.
-A chemist needs 150 milliliters of a 55% solution but has only 11% and 71% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.

A) 40 ml of 11%; 110 ml of 71%
B) 110 ml of 11%; 40 ml of 71%
C) 43 ml of 11%; 110 ml of 71%
D) 43 ml of 11%; 107 ml of 71%