exam Maths Puzzle Numerical Ability

When factoring 2x2 + 4x + 6, the first step is:

find the factors of 6
find the factors of 2
take out the GCF
find the factors of 2 times 6 which add to give 4

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exam Other Question
Social science. If there are 6 x 10(9th power) people on the Earth and there is enough freshwater
to provide each person with 8.79 x 10(5th power) L, how much freshwater is on the
Earth?

thanks What steps are needed to graph the lines lines: y = 0.15x +0.79 : y = 0.11x - y = -0.85