A pharmacist needs 400mL of a 13.5% solution of Ascorbic Acid (Vitamin C). He has on hand a supply of 20% solution and a supply of 8% solution. What is the system of equations that can determine the correct amount of each solution to produce the final 13.5% solution required? Mark all
equations needed.

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

If the car had not hit the fence, how much farther would it have skidded? solve the skid-distance formula to find the extra distance that the car would have traveled if it had not hit the fence. round your answer to two decimal places. note that unit conversion is built into the skid distance formula, so no unit conversions are needed.

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?