exam Maths Puzzle Numerical Ability

find the measure of the vertex angle of an isosceles triangle if the measure of each base angle is 42 degrees

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exam Other Question

Please help!

Perform the indicated operation.

n squared +5n+4 / 2n squared+2n TIMES n squared -n-12 / n squared-16

3pq cubed / 5 DIVIDED BY 9p squared q squared / 10
1+1/y How do I do this problem? I know that I have to use the
----- greatest common factor but what is it?
1/y