exam
Maths Puzzle
Numerical Ability
The capacity of an elevator is 20 children or 15 adults. If 12 children are in the elevator, how many adults can get in?
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exam Other Question
factor completely
7x^2-28y^2
I need help simplifying and solving the following equation for H:
A= 1/2h(a+b).
I got to 2A=ha + hb. Is this right? How do I solve for H from here?