The chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to t
2 answers:
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Add 2 to the interval.
.. [-8, 7]
Consider the range of absolute values of numbers in this interval.
.. [0, 8]
Multiply by -5.
.. [-40, 0]
Add -7.
.. [-47, -7]
This corresponds to selection ...
.. C. [-47, -7]
_____
For confirmation, here's a graph.
.. [-8, 7]
Consider the range of absolute values of numbers in this interval.
.. [0, 8]
Multiply by -5.
.. [-40, 0]
Add -7.
.. [-47, -7]
This corresponds to selection ...
.. C. [-47, -7]
_____
For confirmation, here's a graph.