exam Maths Puzzle Numerical Ability

Graph the function with equation y= ab(2x-30) and how would I use the graph to find the values of x for which ab(2x-3)< 5

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exam Other Question

what are the x and y intercepts of the equation x/2 + y/3 = 1? A man deposited $6800 into two accounts. One account earns interest at 8% and the other at 10.5%. The total interest for one year is $669. Find the amount deposited in each account.