exam Maths Puzzle Numerical Ability

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If g(x)= -7x + 2, find g(-6)

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exam Other Question

In a certain company, 30 percent of the men and 20 percent of the women attend night school. If 40 percent of all employees are men, what percentage of all the employees attend night school? THE QUANTITY y VARIES AS x AND INVERSELY AS z. IF y=15 WHEN x= 50 AND z= 10, FIND y WHEN x= 65 AND z= 5.

PLEASE HELP ME LEARN HOW TO EVEN BEGIN THIS PROBLEM.. I DO NOT EVEN KNOW