exam Maths Puzzle Numerical Ability

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

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exam Other Question
If a river flows at a rate of 3mph and a boat travels 60 miles upstream and returns in a total time of 9 hours. How fast would the boat travel be traveling in still water? I just wanted to be sure I graphed this problem correctly.


Graph points A(-3,2), B(4,0), C(0,-2), D (-3,-1)


Thank you