exam Maths Puzzle Numerical Ability

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A person traveled 120 miles in one direction. The return trip was accomplished at double the speed and took three hours less time. Find the speed going.

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exam Other Question

A company is selling a natural insect control that mixes ladybug beetles and praying mantises in the ratio of 7 to 4. If there are a total of 110 insects per package, how many of e 5x+7y=b
mx+y=22

Find the vaule of m and b in the following systems so that the soultion to the system is (-3,4).