exam Maths Puzzle Numerical Ability

how do you graph the following??

y<2x-3
and
3x-2y<=6

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exam Other Question

"If 5 to the 21st power * 4 to the 11th power = 2 * 10 to the nth power, what is the value of n?"

With a calculator, the answer is 21. However, I would appreciate knowing how to solve this problem without a calculator. Thank you.
Determine the equation of the line that passes through the point (8,2) and is parallel to the line 2 y - 16 x = 3. Select the correct answer in slope-intercept form