A = -16 b = 0 c = 541
Use the quadratic formula which is
x = [-b +- sq root (b^2 -4*a*c)] / 2*a
x = [-0 +-sq root (0 -4*-16*541)] / 2 * -16
x = + - sq root (0 -4*-16*541) / -32
x = + - sq root (34,624) / -32
x = + - 186.075 / -32
x1 = 186.075 / -32 =
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-5.81484375
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x2 = -186.075 / -32 =
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5.81484375
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Wouldn’t it be 7*4/2? so the answer would be 14
21 full tables because if you divide the amount of plates you have by the amount of plates needed for each table you’ll get 21.5 but they asked for full tables so that would be 21
Answer x=-4
This would make a straight line going perpendicular to y=-3 and would pass through the point -4,3.
Answer:
It's the 3rd one using the formula 
Once you follow that step you need to multiply the exponent of 3 and 6 with the exponent outside the parenthesis..... which is why it's the 3rd one.
