book Maths Puzzle Numerical Ability

If f(x) = x3 + 4 and g(x) = x + 3, find [g � f](2)

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book Other Question

Harold camped out in the desert one evening. In the morning, he jumped into his car to go home. He drove at 30 mph headed for the nearest highway, which was 6 miles away. Just as h please help me solve this: 1/2 + 4m = 3m - 5/2 And if possible show the check.