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ankoles [38]
2 years ago
10

Hello people ~factorise↷ x^2 + 4x –21​

Mathematics
1 answer:
EleoNora [17]2 years ago
8 0

Let's see

\\ \rm\rightarrowtail x^2+4x-21

\\ \rm\rightarrowtail x^2+7x-3x-21

\\ \rm\rightarrowtail x(x+7)-3(x+7)

\\ \rm\rightarrowtail (x-3)(x+7)

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What is the number of ways to arrange 6 objects from a set of 10 different objects
bagirrra123 [75]
<span>10!/(10-6)! =
3628800/24 =
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6 0
3 years ago
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A set of numbers satisfies Benford’s Law if the probability of a number starting with digit d is P(d) = log(d + 1) – log(d).
irakobra [83]

Interpreting the graph and the situation, it is found that the values of d that can be included in the solution set are 1 and 4.

----------------------

  • According to Benford's law, the probability of a number starting with digit is d is:

P(d) = \log{(d + 1}} - \log{d}

  • A number can start with 10 possible digits, ranging from 1 to 9, which are all integer digits.
  • Thus, d can only assume integer digits.
  • In the graph, the solution is d < 5.
  • The integer options for values of d are 1 and 4.
  • For the other options that are less than 5, they are not integers, so d cannot assume those values.

A similar problem is given at brainly.com/question/16764162

8 0
2 years ago
Read 2 more answers
12 is 24% of what number
alexgriva [62]
The answer is 200
explanation:
6 0
3 years ago
How many solutions does 9 - 5x = 8 - 3x - 1 -2x have?
Burka [1]

Answer:

D) Zero solutions

Step-by-step explanation:

9 - 5x = 8 - 3x - 1 - 2x

9 - 5x = 7 - 5x

9 = 7

Zero solutions

7 0
2 years ago
Which of the following best describes the relationship between the variables on the scatter plot below?
CaHeK987 [17]

Answer:

A. negative correlation

Step-by-step explanation:

Let two variables x and y, the correlation coefficient r measure to what degree the variables x and y are related.

--- If this coefficient is positive then the relationship will be positive. This means that even an increase in the variable x will produce an increase in the variable y. In the dispersion diagram the points will be grouped, simulating a line of positive slope.

--- If this coefficient is negative then the relation will be negative. This means that even an increase in the variable x will produce a decrease in the variable y. In the dispersion diagram the points will be grouped, simulating a negative slope line.

In the diagram shown it can be noted that as the variable x increases the variable y decreases.

Therefore it can be concluded that the correlation between x and y is negative. The correct option is option A

4 0
3 years ago
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