Which expressions are equivalent to -3(2+7) A: -6+21 or B:-21+6
1 answer:
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Answer:
Step-by-step explanation:
If there are 3 milliliters of compound A used for every 4 milliliters of compound B, then we can denote that we use 3x milliliters of compound A and 4x milliliters of compound B to get 533 milliliters of the drug. Thus,
Hence, a chemist must take
of compound B.