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AleksAgata [21]
3 years ago
9

8 ÷ -2 · 42 + 9 i need help please

Mathematics
2 answers:
taurus [48]3 years ago
6 0
The answer is 43! Have a nice day!
OleMash [197]3 years ago
5 0
I have to write 20 characters but is is 43
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A sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's p
charle [14.2K]

Answer:

So the value of the test statistic is -0.85.

Step-by-step explanation:

We know that a sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 54% of the chips do not fail in the first 1000 hours of their use.

We get that:

n=1800\\\\p_1=53\%=0.53\\\\p_2=54\%=0.54\\

We calculate the standar deviation:

\sigma=\sqrt{\frac{0.53 \cdot (1-0.53)}{n}}=\sqrt{\frac{0.53 \cdot 0.47}{1800}}=0.01176

We calculate the value of the test statistic:

z=\frac{p_1-p_2}{\sigma}=\frac{0.53-0.54}{0.01176}=-0.85

So the value of the test statistic is -0.85.

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3 years ago
A) y = 7sin (x - 40°) + 14<br> describe transformation
Ann [662]

Answer:

sorry sir i dont really know sir

6 0
3 years ago
List all the factors of the number 48.
Anni [7]
The answer would be 1,2,3,4,6,8,12,16,24,48

hope this helps!
4 0
3 years ago
Four tanks each had 54 litres and 750ml. what is their total capacity in litres ​
Furkat [3]

Answer: 219 I beleive

Step-by-step explanation: 54(4)+(.750)4=219

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3 years ago
Read 2 more answers
Which expressions are equivalent to 5(-2k-3)+2k
bulgar [2K]

Answer:

-8k - 15

Step-by-step explanation:

5(-2k-3)+2k

At first, we will break the parenthesis. To break that, we will multiply the value inside the parenthesis by the adjacent number, that is 5. Again, we have to consider the Algebraic operation (Golden rule) -

[(-) x (-) = (+); (+) x (-) = (-)]

Therefore, since there is a minus sign in each of the value inside the parenthesis, the result will be minus as 5 is a positive integer.

or, -5*(2k) - (5*3) + 2k

or, -10k - 15 + 2k

or, -8k - 15 (after the deduction)

The answer is = -8k - 15

6 0
3 years ago
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