exam Maths Puzzle Numerical Ability

i need help with this story problem.

Andrea purchased a picture frame for $14.56. This price was a 30% markup from the wholesale cost. What was the wholesale cost?

please & thank-you!
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exam Other Question

Please help me translate this into a quadratic equation and solve.

The Hudson River flows at a rate of 3 miles per hour. A patrol boat travels 60 miles upriver, and returns in a total time of 9 hours. What is the speed of the boat in still water? How would I determine the maximum and minimum values of the following set of numbers:
3, -36/7, -1, -2/3, 5/4, 26/9