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ycow [4]
3 years ago
14

Glenn bought 3 pounds of tomatoes. He used § of them to make sauce.

Mathematics
1 answer:
hram777 [196]3 years ago
5 0

Answer: (x%/100%)*3 pounds = M

where x% is the percentage of the 3 pounds of tomatoes that Glenn used.

Step-by-step explanation:

Ok, i guess that there is a missing percentage here.

Suppose that this percentage is x%

such that:

0% ≤ x% ≤  100%

Now, the 3 pounds of tomatoes is the 100%.

Then a mass M will correspond to the amount that he used to make the sauce, the x%.

We have the realtion:

100%*M = x%*3pounds

M = (x%/100%)*3 pounds.

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1) We have that the equation is x^2=20y , hence y=x^2/20. The standard equation of such an equation is y=\frac{1}{4p} x^2. Hence, p=5 in this case. The focus is at (0,5) and the directrix is at y=-5 (a tip is that the directrix is always "opposite" the focus point of a parabola; if the directrix is at x=-7 for example, the focus is at (7,0)).
2) Similarly, we have that the equation is x=3y^2 \\  \frac{1}{4p} =3. Thus, p=1/12. In this case, the parabola opens along the x-axis and the focus is at (1/12, 0). Also, the directrix is at x=-1/12. Hence the correct answer is B.
3) We are given that the parabola has a p of 9. Also, the focus lies along the y-axis, hence the parabola is opening along the y-axis. Finally, the focus is on the positive half, so the parabola is opening upwards. The equation for this case is y=y=\frac{1}{4p} x^2= \frac{1}{36 } x^2.
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7 0
3 years ago
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