exam Maths Puzzle Numerical Ability

When solving a linear inequality, do you always need to solve for y? Why or why not?

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exam Other Question

The graph of f(x)=2(x-1)^2+3 has the following characteristic?

a) vertex: (1,3) and opens downward
b) vertex: (1,3) and doesn't cross the x axis
c) vertex: (1,3) and has two y
I realy need to find out how to solve this problem. Please help. Thanks.

Here are two primitive models of natural increase of biological populations, similar to those Fibonacc