exam
Maths Puzzle
Numerical Ability
A postal clerk sold 75 stamps, some of which were 5 cents and some were 8 cents. The total amount was $4.80. How many of each stamp was sold?
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exam Other Question
find the slopes of the lines l1 and l2 determined by the two given points. then identify whether l1 and l2 are parallel,perpendicular,or neither.
# 60
l1:(0,0)and(-2,4)
l2:(1,-5)and(-1,-1)
Solve for x: (2x-1)(^1/2)=sqrt3