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3 years ago

The critical points of a rational inequality are x = –4 and x = 2. Which set of points can be tested to solve the inequality?

Mathematics

2 answers:

Alexxandr [17]3 years ago

7 0

-5, 0, 3
You need to test a point at each interval

RoseWind [281]3 years ago

3 0

answer:

C. x = –5, x = 0, and x = 3

hope this helps! :o)

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How many solutions does the following equation have?

Tom [10]

Answer:

Answer choice D, Infinitely many solutions.

Step-by-step explanation:

6x-24=6x-24

3 0

4 years ago

Match each equation to its solution.

astra-53 [7]

Good job you got it right! But others won’t be able to find it because you have a basic writing for it. Next time put the actual equations on so others can find it!

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3 years ago

Read 2 more answers

B) John returns from holiday with these notes.

ivolga24 [154]

Answer:

£290.70

Step-by-step explanation:

Number of notes of $50 = 5

Total value = 50 × 5 = $250

Number of notes of $20 = 2

Total value = 20 × 2 = $40

Number of notes of $10 = 7

Total value = 10 × 7 = $70

Number of notes of $5 = 3

Total value = 5 × 3 = $15

Total value of all notes with John = 250 + 40 + 70 + 15

= $375

Since, $1.29 = £1

Therefore, $1 = £ $\frac{1}{1.29}$

Therefore, $375 = £ $\frac{375}{1.29}$

= £290.70

4 0

3 years ago

Find the standard deviation of 21, 31, 26, 24, 28, 26

Vesnalui [34]

Given the dataset

$x = \{21,\ 31,\ 26,\ 24,\ 28,\ 26\}$

We start by computing the average:

$\overline{x} = \dfrac{21+31+26+24+28+26}{6}=\dfrac{156}{6}=26$

We compute the difference bewteen each element and the average:

$x-\overline{x} = \{-6,\ 5,\ 0,\ -2,\ 2,\ 0\}$

We square those differences:

$(x-\overline{x})^2 = \{36,\ 25,\ 0,\ 4,\ 4,\ 0\}$

And take the average of those squared differences: we sum them

$\displaystyle \sum_{i=1}^n (x-\overline{x})^2=36+25+4+4+0+0=69$

And we divide by the number of elements:

$\displaystyle \sigma^2=\dfrac{\sum_{i=1}^n (x-\overline{x})^2}{n} = \dfrac{69}{6} = 11.5$

Finally, we take the square root of this quantity and we have the standard deviation:

$\displaystyle\sigma = \sqrt{\dfrac{\sum_{i=1}^n (x-\overline{x})^2}{n}} = \sqrt{11.5}\approx 3.39$

8 0

3 years ago

Select all the expressions that are equivalent to 13 - x *

alina1380 [7]

You gave no options but the simplest way to solve this is to set it equal to all of the answers to see if it is correct.

7 0

3 years ago