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Andreas93 [3]
3 years ago
8

What is the value of the expression x + (–y) when x = –2.3 and y = –5.9? A. –8.2 B. –3.6 C. 3.6 D. 8.2

Mathematics
1 answer:
11Alexandr11 [23.1K]3 years ago
7 0
Now it would be
-2.3+(-5.9)

now just add those two together
and u get -8.2
So the answer is A
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Answer:

The first choice, students tend to have less siblings than teachers

Step-by-step explanation:

If you look at the dot plots you notice that the teachers have more numbers than the students do and that the students have less sibling. It is not answer 2 because the students have less sibling, it is not answer 3 b/c they do not have the same range, and it is not number 4 because they do not look the same or have the same shape.

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3 years ago
Plz help first right gets brainly
Anestetic [448]
A. Is not linear because is has no y
How this helped ya out! :D
6 0
2 years ago
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John bought new headphones originally listed for $ 80.99 . They are \(35\%)| off. Which equation can be used to find the amount
Katarina [22]

Answer:

$28.35

Step-by-step explanation:

The headphones are $80.99 and are 35% off. To find the amount he will save, change the 35% to a decimal by moving it two times to the left, which is 0.35. Multiply 80.99 and 0.35 to get 28.3465. Round to get $28.35.

7 0
2 years ago
The batteries from a certain manufacturer have a mean lifetime of 850 hours, with a standard deviation of 70 hours, assuming tha
matrenka [14]

To answer (a), we will need to find the Z value for 710 hours and 990 hours.

\begin{gathered} For\text{ 710} \\ Z\text{ = }\frac{x-\mu}{\sigma} \\ \text{    = }\frac{710-850}{70} \\ \text{    = -2} \\ p\text{ =0.0228 } \\ For\text{ 990:} \\ Z\text{ = }\frac{990-850}{70} \\ \text{ =2} \\ p\text{ = 0.9772} \end{gathered}\begin{gathered} To\text{ find P \lparen–2 \le Z \le 2\rparen} \\ =\text{ 0.9772 -0.0228} \\ =\text{ 0.9544} \\ =95.44\% \end{gathered}

B) 68% of data lies between one standard deviation of the mean.

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5 0
1 year ago
Find the value of x. If​ necessary, write your answer in the simplest radical form.
Paul [167]

Answer:

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Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

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x² + 1² = 9²

x² + 1 = 81 ( subtract 1 from both sides )

x² = 80 ( take square root of both sides )

x = \sqrt{80} = \sqrt{16(5)} = \sqrt{16} × \sqrt{5} = 4\sqrt{5}

3 0
2 years ago
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