exam Maths Puzzle Numerical Ability

Let A = (0,0), B = (4,2), C = (1,3), find the exact size of angle CAB. Justify your answer without your protractor.

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exam Other Question

evaluate each expression when a=9, b=-3, and c=7


1. 4a+7
2. c(c+3)
3. 7b+2a
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What is the angle of elevation of the sun when a 35-ft mast casts a 20-ft shadow?