exam Maths Puzzle Numerical Ability

You have at least $30 in change in your drawer, consisting of dimes and quarters. Write an inequality that show the different number of coins in your drawer.

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exam Other Question

find the vertical asymtotes, f any, of the graph of the rational function.

f(x)=x/x^2+4
a. x=-4,x=4
b. x=4
c. x=-4
d. no vertical asymptote If I need to find the average of these numbers: 18+(-17)+(-22)+(16)+(0) do I count the 0 in my number of terms?? In other words, do I divide the total (5) by 4 or 5?
thanks.
Kim