3 years ago

What is the correct answer for this question

Mathematics

1 answer:

ioda3 years ago

5 0

Answer:

2 option I think, if I'm wrong so sorry ;(

Step-by-step explanation:

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Select the correct answer.

alexira [117]

Answer:

$\huge\boxed{A.\ -\dfrac{9}{4}+2i}$

Step-by-step explanation:

The standard form of a complex number:

$z=a+bi\\\\a,\ b\in\mathbb{R}$

$3i+\left(\dfrac{3}{4}+2i\right)-(3+3i)=3i+\dfrac{3}{4}+2i-3-3i\\\\=\left(\dfrac{3}{4}-3\right)+(3+2-3)i=-2\dfrac{1}{4}+2i=-\dfrac{9}{4}+2i$

3 0

3 years ago

Paul spent 2 hours and 45 minutes working on homework if he started at 5:20 what time was it when he finished

Sedaia [141]

He'd finish at 8:05
Hope this helps :)

3 0

3 years ago

Read 2 more answers

You start at (8, 0). You move right 2 units. Where do you end?

frez [133]

Answer:

(10,0)

Step-by-step explanation:

Moving right 2 units will increase the x value by 2 since you are going further 'down the corridor'. Hope this helps.

8 0

2 years ago

In a study of facial behavior, people in a control group are timed for eye contact in a 5- minute period. Their times are normal

Lorico [155]

Answer:

0.20148

Step-by-step explanation:

We solve using z score formula

z = (x-μ)/σ, where

x is the raw score = 230

μ is the population mean = 184

σ is the population standard deviation = 55

z = 230 - 184/55

z = 0.83636

P-value from Z-Table:

P(x<230) = 0.79852

P(x>230) = 1 - P(x<230) = 0.20148

Therefore, the probability that the eye contact time is greater than 230 seconds is 0.20148

3 0

3 years ago

Round 325.49 to the nearest tenth place

Travka [436]

Random letters so i can just put the answer

325.50 i think

3 0

3 years ago