book Maths Puzzle Numerical Ability

The playing portion of a football field is 100 yards long and 50 yards wide. Each of the two end zones is 10 yards deep and 50 yards wide. What is the total area in acres? Provi

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book Other Question
What is the prime factorization of 12q? x(x+3)=(-4x-11)/4

I come up with
(x+3)=(-7x)/4
and that is the further I get from there.
marie