What fraction has the greatest value 2/8. 1/8. 2/4. 2/6

Which shows one way to determine the factors of  x3  +  5x2  –  6x  –  30 by grouping? x(x2  –  5)  +  6(x2  –  5)x(x2  +  5)  –  6(x2  +  5)x2(x  –  5)  +  6(x  –  5)x2(x  +  5)  –  6(x  +  5)

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth