exam Maths Puzzle Numerical Ability

solve x-4/x+5 >=3

Textbook Beecher, penna and bittinger
practice problems

thank you very much

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exam Other Question

factor the polynomial completely,clearly show GCF

4x^2-16

I went another step and I am not sure weather to factor again after this:

(2x - 4)(2x + 4) pls help me on my algebra equation. thanks thanks

1. (1-x)(x+2) + (x+3)(x+4)=0
2. m(m-2x) +2 cm=a(2x-a)
3. sn-g(2n+4)-2(n-g)=0
4. 4m(x-5a)-3m(a-x)=0