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Evgesh-ka [11]
3 years ago
14

Need help plz i dont know how to do this

Mathematics
1 answer:
nexus9112 [7]3 years ago
8 0
You FOIL
9x^2-15x+21x-35
Combine like terms
9x^2 + 6x - 35
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How much is 3 nines?
mojhsa [17]

Answer:

to the third power ?

Step-by-step explanation:

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3 years ago
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What is 2,789 divided by 36
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It's 77.472 , but since you probably need too round it will be 77.5
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The sampling examples below use either the stratified or the cluster method of sampling. Select the examples that use the strati
Marysya12 [62]

A landlord wants to know the average income of his tenants. He selects three of his eight apartment complexes and collects income information from several randomly chosen tenants within the selected complexes.

A health agency needs to assess the performance of hospitals in a region but does not have the resources to evaluate each hospital. To reduce costs, the agency selects 5 of the 23 hospitals in the region and samples data related to performance from randomly chosen days and times.

Answer: Options D and E.

<u>Explanation:</u>

Cluster sampling is a sampling plan used when mutually homogeneous yet internally heterogeneous groupings are evident in a statistical population. It is often used in marketing research. In this sampling plan, the total population is divided into these groups and a simple random sample of the groups is selected.

Stratified sampling is a probability sampling technique wherein the researcher divides the entire population into different subgroups or strata, then selects the final subjects proportionally from the different strata.

8 0
3 years ago
Does exposure to classical music (through instrument lessons or concert attendance) improve children's scholastic performance? I
Anestetic [448]
The explanatory variable is the amount of exposure the student is given to classical music.
6 0
3 years ago
Evaluate: <img src="https://tex.z-dn.net/?f=%5Csqrt%5B-3%5D%7B27%7D" id="TexFormula1" title="\sqrt[-3]{27}" alt="\sqrt[-3]{27}"
GenaCL600 [577]

Answer:

1/3 is the simplified form for given expression.

Step-by-step explanation:

Given that:

=\sqrt[-3]{27}

By simplifying:

Radical sign will be removed as follows:

= 27^{-1/3}

For removing the "-" sign from power, base will be inverted:

= (1/27) ^ {1/3}

27 can also be written as 3 * 3 * 3 = 3^3

So,

= (1/3^3)^{1/3}

= 1^{1/3} / 3^{3* 1/3}

By simplifying we get:

= 1/3

i hope it will help you!

6 0
3 years ago
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