The quadrilateral have equal opposite sides, for example:
Then, (4x + 6) must be equal to (7x - 3), and (4y - 3) is equal to (3y + 1), therefore

We can solve that equation for x

Hence, x = 3. Now let's solve the other equation

Then the value of y is 4.
Final answers:
x = 3
y = 4
29/ 3 = 9.666 so you would have 9 whole sheets of paper since you can not have half a sheet according to the question
Answer:
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Potential gravitational energy:
mgh
10kg • 10m/s^2 • 0.02 =
2 Joules