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blondinia [14]
3 years ago
15

Find the values of m so that the point (2,3) lies in the curve x^2+y^2+mx+2y-30=0.​

Mathematics
1 answer:
mr_godi [17]3 years ago
7 0

Answer:

= your nose and eye and mouth

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A tortoise can reach speeds of 0.12 m/s. Work out the speed of a tortoise in
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yous should multiply it by 3.6;

0.12*3.6=0.432 km/h

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I need help answering these 1. And 2. <br> 10 points ⭐️<br> If helped
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Let f(x) = -2x + 7 and g(x) = -6x + 3. Find fxg and state its domain.
marissa [1.9K]

Option D: (f\times g)(x)=12 x^{2}-48 x+21; all real numbers.

Explanation:

Given that the functions are f(x)=-2 x+7 and g(x)=-6 x+3

We need to determine the value of (f\times g)(x) and its domain.

<u>The value of </u>(f\times g)(x)<u>:</u>

The value of (f\times g)(x) can be determined by multiplying the two functions.

Thus, we have,

(f\times g)(x)=f(x)\times g(x)

                =(-2x+7)(-6x+3)

                =12x^2-6x-42x+21

(f\times g)(x)=12 x^{2}-48 x+21

Thus, the value of (f\times g)(x) is (f\times g)(x)=12 x^{2}-48 x+21

<u>Domain:</u>

We need to determine the domain of the function (f\times g)(x)

The domain of the function is the set of all independent x - values for which the function is real and well defined.

Thus, the function (f\times g)(x)=12 x^{2}-48 x+21 has no undefined constraints, the function is well defined for all real numbers.

Hence, Option D is the correct answer.

3 0
3 years ago
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A quiz consists of 40 multiple choice​ questions, each with five possible​ answers, only one of which is correct. If a student g
Artist 52 [7]

Answer:

8 and 2.529

Step-by-step explanation:

The computation of the mean and the standard deviation is shown below:

Given that

Total number of questions is n =  40

The Probability of correct answer is p =  \frac{1}{5}

So, the probability of the wrong answer is q =  1 - \frac {1}{5} = \frac{4}{5}

Moreover, this is the binomial distribution

Based on the above information

The mean is

= n \times p

= 40\times \frac{1}{5}

= 8

Now the variance is

= 40\times \frac{1}{5} \times \frac{4}{5}

= \frac{32}{5}

So, the standard deviation is

= \sqrt{\frac{32}{5} }

= 2.529

hence, the mean and the standard deviation is 8 and 2.529 respectively

6 0
3 years ago
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