exam Maths Puzzle Numerical Ability

It is estimated that the earth is loosing 4000 species of plant and animal every year. If S represents the number of species living last year how many species are on earth this year?

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exam Other Question

I have a question that states: use the even and odd powers of (x-c) Theorem to determine where the graph of the given polynomial will cross the x-axis and where the graph will intersect but not cross the x-axis. y=x(x-4)^2 write the slope intercept form for an equation of the line parallel to the graph of the given equation and passing through the given point?

3x+9y=1, (3,0)