Chemistry
posted by John .
The order is given for an injection of 120mg of x and 10mg of y. On the shelf you have 50mg/mL of x and 75mg/mL of y. what will be the total volume in your syringe?

Chemistry 
DrBob222
50 mg/mL x ?mL = 120 mg
75 mg/mL x ?mL = 10 mg
Solve for mL in each case, then,
add ?mL and ?mL = total mL.
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