exam
Maths Puzzle
Numerical Ability
an executive invest $22000, some at 7% and some at6% annual interest. If he recieves an annual return of $1420, how much is invested in each rate?
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exam Other Question
6x^-2y^2
36xy^-3
write in simplest form
i need help with this question i have no idea how to beging to solve it.
it says : subtract the lower polynomial from the upper one
2x^2y-5xy^2+2 and