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aleksandr82 [10.1K]

3 years ago

13

Find the distance between the points 6 + 5i and 1 – 2i.

2 answers:

Grace [21]3 years ago

4 0

This didnt get answered so Ill answer it. Its simple.

The distance between 6 and 1 is going to be 5. (or in some cases, -5)

The distance between +5i and -2i is going to be 7i (or in some cases, -7i)

So depending on how the problem defines the distance, it is either 5 + 7i or -5 - 7i

love history [14]3 years ago

3 0

For edgeunity students it’s approximately 8.6

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Two friends are collecting cards. Frank has 7 more than half the number of cards as his friend. Together they have 42 cards. How

Naddika [18.5K]

Answer:

The number of cards Frank has is 18 and the number of cards his friend has is 24.

Step-by-step explanation:

<u><em>The correct question is </em></u>

Two friends are collecting cards. Frank has 6 more than half the number of cards as his friend. Together they have 42 cards. How many cards does each friend have?

Let

x ----> the number of cards that Frank has

y ----> the number of cards that his friend has

we know that

Together they have 42 cards

$x+y=42$ ----> equation A

Frank has 6 more than half the number of cards as his friend

$x=\frac{y}{2} +6$ ---> equation B

Solve the system by substitution

Substitute equation B in equation A

$\frac{y}{2} +6+y=42$

solve for y

$\frac{3}{2}y=42-6\\\\\frac{3}{2}y=36\\\\y=36(2)/3=24$

<em>Find the value of x</em>

$x=\frac{24}{2} +6=18$

therefore

The number of cards Frank has is 18 and the number of cards his friend has is 24.

7 0

3 years ago

Help anyone?? need to get this done

erik [133]

1) 16
2) 14
3) 21
4) 7
5) 44

6 0

2 years ago

What is the sales tax on the chair shown if the tax rate is 5.75% ( the chairs price is $178.90)

Arturiano [62]

Sales tax is:
$178.90* (5.75/100)=$10.29

The sales tax of the chair is $10.29~

7 0

3 years ago

Can someone answer this for me? <br><br> Thanks!

MrRa [10]

Hiii :))

Answer is in the attachment.

Identity used :-

1) cosec² α = 1 + cot² α

Trigonometric Ratio :-

1) cot 30° = √3

_____

Reddam is an expensive school, right?

RainbowSalt2222 ☔

4 0

2 years ago

Read 2 more answers

A professor at a university wants to estimate the average number of hours of sleep the students get during exam week. The profes

balandron [24]

Answer:

The sample size is $n = 2$

Step-by-step explanation:

From the question we are told that

The margin of error is E =4.266

The standard deviation is $\sigma = 2.539$

From the question we are told the confidence level is 99% , hence the level of significance is

$\alpha = (100 - 99 ) \%$

=> $\alpha = 0.01$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 2.58$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ] ^2$

=> $n = [\frac{2.58 * 2.539 }{4.266} ] ^2$

=> $n = 2$

6 0

3 years ago