exam Maths Puzzle Numerical Ability

can someone Please show me how to solve inequality, giving its solution set in both intervals and graph forms, and check my answer? Thanks!

m - 2(m-4) is less than or equal to

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exam Other Question

Please help me to graph this equation. I am confused as to how to convert Intercept form into Standard form and then graphing.

y=-(x+2)(x-1)
When doing input and out put graphing, if the output starts at a high number do you start at the bottom and go up?