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velikii [3]
3 years ago
15

a six ounce bag of rice makes 7 servings at that rate find out how many ounces of noodles of 15 servings to the nearest ounces

Mathematics
1 answer:
Crank3 years ago
7 0
6:7
?:15
It's some crazy number I worked out but: 12.86 is the best thing I could get lol
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Find the range of p in equation p(x+1) (x-3)=x-4p-2 has no real roots. ​
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Answer:

\displaystyle p > \frac{1}{4}.

Step-by-step explanation:

Expand the left-hand side of this equation:

p\, (x + 1)\, (x - 3) = p\, \left(x^2 - 2\, x - 3\right) = p\, x^2 - 2\, p\, x - 3\, p.

Collect the terms, so that this quadratic equation is in the form a\, x^2 + b\, x+ c = 0:

p\, x^2 - 2\, p\, x - 3\, p = x - 4\, p - 2.

p\, x^2 - (2\, p + 1)\, x + (p + 2) = 0.

In this equation:

  • a = p.
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Calculate the quadratic discriminant of this quadratic equation:

\begin{aligned}b^2 - 4\, a\, c &= (-(2\, p + 1))^2 - 4\, p\, (p + 2) \\ &= 4\, p^2 + 4\, p + 1 - 4\, p^2- 8\, p = -4\, p + 1\end{aligned}.

A quadratic equation has no real root if its quadratic discriminant is less then zero. As a result, this quadratic equation will have no real root when -4\, p + 1 < 0. Solve for the range of p:

\displaystyle p > \frac{1}{4}.

4 0
4 years ago
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