exam Maths Puzzle Numerical Ability

13) Graph the inequality on a plane
5x+6y <= 30

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exam Other Question

Nine pounds of sweet potatoes cost the same as 6 pounds of apples. One pound of sweet potatoes costs twice as much as a pound of onions, while a pound of apples costs 24 cents more than a pound of onions. Find the cost of each. Solve the exponential or logarithmic equations. (Write your final answer in BOTH exact and approximate value).

(a) 6^x-3 = 2^x

(b) log(5x-6) = 2log x