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madreJ [45]
2 years ago
10

PLZ NEED HELP Reduce this algebraic fraction.y^3-3y^2+y-3/y^2-9

Mathematics
1 answer:
Kamila [148]2 years ago
4 0
<span> y5 - 3y4 + y3 - 9y2 - 3
 ——————————
                 y2

tell me if im right
</span>
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First replace x and y by 3 and 4.

(3*(x)+1)/(4*(y)^2)

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PetSmart.com sold the following varieties of dog food in June 2003.
aivan3 [116]

Let x  be the number of bags of Nature's Recipe Venison Meal & Rice Canine 20 percent protein, y be the number of bags of Nutro Max Natural Dog Food 27 percent protein and z be the number of bags of PetSmart Premier Oven Baked Lamb 25 percent protein a dog breeder buys. He  wants to make 300 pounds of a mix. Then

20x+17.5y+30z=300.

Now

  • in 20x pounds of Nature's Recipe Venison Meal & Rice Canine 20 percent protein is 0.2·20x=4x pounds of protein;
  • in 17.5y pounds of Nutro Max Natural Dog Food 27 percent protein is 0.27·17.5y=4.725y pounds of protein;
  • in 30z pounds of PetSmart Premier Oven Baked Lamb 25 percent protein is 0.25·30z=7.5z pounds of protein;
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Then 4x+4.725y+7.5z=66.

You get a system

\left\{\begin{array}{l}20x+17.5y+30z=300\\4x+4.725y+7.5z=66.\end{array}\right.

From the first equation z=10-\dfrac{2}{3}x-\dfrac{7}{12}y. Substitute it into the second equation:

4x+4.725y+7.5(10-\dfrac{2}{3}x-\dfrac{7}{12}y)=66.

Simplify it:

-x+\dfrac{7}{20}y=-9,\\ \\ 20x-7y=180.

y must be divided by 20, then

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  • y=60, x=30, z=10-20-35<0;
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Answer: 9 bags with 1st mix, 0 bags with 2nd mix and 4 bags with 3rd mix.

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3 years ago
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