exam Maths Puzzle Numerical Ability

What is the slope of -2, passing through (4,-1)
Passing through (7,-3) and (5,-2)

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exam Other Question

On an oblique triangle A=27.2 in., B=33.4 in., C=44.6 in. Find digits a and b such that the number 34a47b5893 is divisible by 99.