Please help! sort the equations by whether they are polynomial or not (picture attached)

Mathematics

1 answer:

lana66690 [7]3 years ago

4 0

Answer: 5/x3-1/x2+8/x-40 is not polynomial. The rest are polynomial.

Step-by-step explanation:

Polynomials cannot have a number divided by a variable so 5/x3-1/x2+8/x-40 can't be a polynomial.

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What is 7! Like seven times all the numbers below it

aleksandr82 [10.1K]

Explain yourself more and I’ll help

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3 years ago

A carton of paper is priced at 27.00 now if the paper goes on sale for 25% off the current price what will be the sale price of

hjlf

Okay, to solve this we simply find 75% of the carton of paper, because 100%-25% = 75%

0.75(27) = 20.25

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3 years ago

Assume that when adults with smartphones are randomly selected, 54% use them in meetings or classes (based on data from an lg sm

GuDViN [60]

Answer: 0.951%

Explanation:

Note that in the problem, the scenario is either the adult is using or not using smartphones. So, we have a yes or no scenario involved with the random variable, which is the number of adults using smartphones. Thus, the number of adults using smartphones follows the binomial distribution.

Let x be the number of adults using smartphones and n be the number of randomly selected adults. In Binomial distribution, the probability that there are k adults using smartphones is given by

$P(x = k) = \frac{n!}{k!(n-k)!}p^k (1-p)^{n-k}$

Where p = probability that an adult is using smartphones = 54% (since 54% of adults are using smartphones).

Since n = 12 and k = 3, the probability that fewer than 3 are using smartphones is given by

$P(x \ \textless \ 3) = P(x = 0) + P(x = 1) + P(x = 2)
\\ \indent = \frac{12!}{0!(12-0)!}(0.54)^0 (1-0.54)^{12-0} + \frac{12!}{1!(12-1)!}(0.54)^1 (1-0.54)^{12-1} + \\ \indent \frac{12!}{2!(12-2)!}(0.54)^2 (1-0.54)^{12-2}
\\
\\ \indent = \frac{12!}{(1)(12!)}(0.46)^{12} + \frac{12(11!)}{(1)(11!)}(0.54)(0.46)^{11}+ \frac{12(11)(10!)}{(2)(10!)}(0.54)^2(0.46)^{10}
\\
\\ \indent = (1)(0.46)^{12} + (12)(0.54)(0.46)^{11}+ (66)(0.54)^2(0.46)^{10}
\\ \indent \boxed{P(x \ \textless \ 3) \approx 0.00951836732 }
$

Therefore, the probability that there are fewer than 3 adults are using smartphone is 0.00951 or 0.951%.

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4 years ago

Pitcher holds 65 ounces she drinks 6 cups how much water is left in the pitchet

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There is 17 Ounces left! Or 2.12500 cups.

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4 years ago

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Hat is the surface area of a sphere with a diameter of 16 cm

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The surface area of a sphere of radius r is A = 4π*r^3.

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