exam Maths Puzzle Numerical Ability

For this question, we must find the revenue from the sale of x items given by R=50x. Does this ask to graph the equation only or do I need to solve this for x. And if so, how do I do it?

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exam Other Question

Simplify the expression 13[6 to the 2nd power divided by (5to the 2nd power minus 4 to the 2nd power) +9] For a test of 8 true/false questions,Maria was curious about the following if she would answer every question by guessing. Determine
A) The probability of getting the first three