exam Maths Puzzle Numerical Ability

Find LCM of m^2-4m-5 and m^2+8m+7.

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exam Other Question

In triangle CDE, CD=3y, DE=30, and CE=45. Determine the range possible values for y

I think the answer is 5 < y < 25

is this correct? the measure of <1 and relationships of <1 to <2 is given. Find m<2.

m<1=47 degree, complementary to <2.