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3 years ago

When multiplying two negative integers, what is the sign of the product

2 answers:

8 0

When you multiply two negative numbers it will be possitive. A way to know that is if there is an even number of negatives its posistive here we have 2 negative numbers and 2 is an even number sooooooo it is a positive! Hope this helps and have a great day!

torisob [31]3 years ago

6 0

Answer:

Step-by-step explanation:

When multiplying two negative integers, what is the sign of the product?

positive

negative

zero

one

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3x+2y+4+9y=<br> Plz answer

fomenos

<span>3x+2y+4+9y=

Combine like terms:
2y+9y=11y

I believe the answer is 3x+11y+4

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4 years ago

Please help me on this!!

almond37 [142]

Answer:

TW = ST

Step-by-step explanation:

RS = RW (Given)

RT = RT (reflexive property)

This makes ∆RST congruent to ∆RWT based on the reflexive property of congruence.

Therefore, the third corresponding sides, TW and ST would be congruent to each other.

Thus:

TW = ST

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3 years ago

A computer manufacturing company has sent a mail survey to 2,800 of its randomly selected customers that have purchased a new la

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Answer:

The 96% confidence interval for the population proportion of customers satisfied with their new computer is (0.77, 0.83).

Step-by-step explanation:

We have to calculate a 96% confidence interval for the proportion.

We consider the sample size to be the customers that responded the survey (n=800), as we can not assume the answer for the ones that did not answer.

The sample proportion is p=0.8.

$p=X/n=640/800=0.8$

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.8*0.2}{800}}\\\\\\ \sigma_p=\sqrt{0.0002}=0.014$

The critical z-value for a 96% confidence interval is z=2.054.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_p=2.054 \cdot 0.014=0.03$

Then, the lower and upper bounds of the confidence interval are:

$LL=p-z \cdot \sigma_p = 0.8-0.03=0.77\\\\UL=p+z \cdot \sigma_p = 0.8+0.03=0.83$

The 96% confidence interval for the population proportion is (0.77, 0.83).

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3 years ago

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Answer:

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3 years ago

Suppose a researcher is testing a new vaccine on mice to see how well it prevents the flu virus. The lab has 1000 mice available

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Solution :

Sampling may be defined as the technique of selecting the individual members or the subset of the population to make a statistical inferences and estimates the characteristics of the entire population.

There are several sampling methods. This includes : Systematic sampling, clustered sampling, stratified sampling, quota sampling, judgement sampling, random sampling, convenience sampling and many more.

In the context, the sampling methods for each of the descriptions are :

a). The researcher use computer program to randomly choose a sample of 30 mice of the 1000 mice for using her study

--- Simple Random

b). The researcher chose the 1st 30 mice as she can reach the door to the mouse room

--- Convenience sampling

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---- Stratified sampling

d). Each of the cage have 5 mice and the researcher randomly chooses 6 cages for her study

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e). The researcher generates the list of the identification numbers which has been sorted from the smallest to the largest. The researcher randomly picks 1 mouse form the list and selects every 4 mouse until the researcher has 30 mice.

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3 years ago