exam
Maths Puzzle
Numerical Ability
AB is perpendiular to bc d is between a and c prove: angleA BD is complementary to angle CBD
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Could I please get some additional help with the following problem:
Write
A=pi/4 as an equation in rectangular coordinates, (x,y)
Thank You,
RF
A chemist has one solution that is 25% acid and a second that is 50% acid. How many liters if each should be mixed to 10 L of a solution that is 40% acid?