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3 years ago

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Mathematics

1 answer:

lina2011 [118]3 years ago

5 0

The answer for this question is B because - -e/-f is the same as - -e/f

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Perform the operation. (8x2 – 7x – 2) – (6x2 – x + 3)

rewona [7]

Answer:

2 x² - 6x -5

Step-by-step explanation:

Expansion:-

Given that the expression

(8x²-7x-2)-(6x²-x+3)

= 8x² - 6x² - 7x +x -2 -3

= 2 x² - 6x -5

5 0

3 years ago

you send out 20,000 emails of 6% are opened of those 9% clicked on the link to register for something of those who clicked on th

nikitadnepr [17]

Answer:

Rounding to the next whole, 33 persons completed the registration

Step-by-step explanation:

1. Let's review the information provided to us to answer the question correctly:

Number of e-mails sent out = 20,000

Number of e-mails opened = 6%

Number of e-mails that clicked on the link to register = 9% of the 6%

Number of e-mails that completed the registration = 30% of 9% of 6%

2. How many people completed the registration?

Let's do all the calculations to answer the question, this way:

Number of e-mails opened = 6 % of 20,000

Number of e-mails opened =0.06 * 20,000 = 1,200

Number of e-mails that clicked on the link to register = 9% of the 6%

Number of e-mails that clicked on the link to register = 0.09 * 1,200 = 108

Number of e-mails that completed the registration = 30% of 9% of 6%

Number of e-mails that completed the registration = 0.3 * 108 = 32.4

Rounding to the next whole, 33 persons completed the registration

6 0

3 years ago

Read 2 more answers

A study claims that the mean age of online dating service users is 40 years. Some researchers think this is not accurate and wan

Mademuasel [1]

Answer: $H_0:\mu=40$

$H_0:\neq40$

Step-by-step explanation:

A null hypothesis is a hypothesis where a researcher generally try to disprove, it says that there is no statistically significant relationship between the two variables .
An alternative hypothesis says that there is a statistical significance between two variables.

Claim 1. : Mean age of online dating service users is 40 years.

i.e. $\mu=40$ , since it has equals sign so we take this as null hypothesis.

Claim 2. : Mean age of online dating service users is not 40 years.

$\mu\neq40$

⇒ Null Hypothesis : $H_0:\mu=40$

Alternative hypothesis : $H_0:\neq40$

5 0

3 years ago

14. All phone numbers consist of a three-digit area code, a three-digit exchange, and then a four-digit number. A town uses the

Oliga [24]

ANSWER

9000

= 1 X 1 X 9 X 10 3 = 9000

3 0

3 years ago

Hello, I need help with this question.

ella [17]

Answer:

The answer would be 22/12 or 1 and 11/12

Step-by-step explanation:

1/2+2/3+3/4

First get common denominators so you have a denominator of 12 so 6/12+8/12+9/12

Add those together and you get 23/12 but you have to subtract one because that's what the problem says so you get 22/12

4 0

3 years ago

Read 2 more answers

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