exam Maths Puzzle Numerical Ability

Which ordered pair is a solution to 3x-4y=-1?

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exam Other Question

Solve, show property used(associative, communative, and distributive)and show all steps.

15.) (45•32)•0

17.) 50•(118•20)

19.) (25•78)•4
The average of four numbers is 18. If one of the four numbers, 25, is taken away, what is the average of the remaining three numbers?