exam Maths Puzzle Numerical Ability

Some one please help.

Mary Sue wants to know if there is a connection between attendance at craft fairs and the number of exhibitors who have booths at the fair. For a random s

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Hi may I have some help with this inequality?

Solve the inequality. Express the answer using interval notation.

3-|2x+4|< 1 Desa invested a certain amount of money at 4% interest and $1500 more than that amount at 7%. Her total yearly interest was $435. How much did she invest at each rate?