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emmasim [6.3K]
2 years ago
10

Which of the following is a complex number?

Mathematics
1 answer:
Oxana [17]2 years ago
6 0

Answer:

B)~ 3\sqrt{\dfrac 75} + \sqrt{- \dfrac 95 }

Step-by-step explanation:

3\sqrt{\dfrac 75} + \sqrt{- \dfrac 95 }\\\\\\= 3\sqrt{\dfrac 75} + i\sqrt{\dfrac 95 }\\\\\text{It is now in the standard form of a complex number (a+bi).}

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5.<br>Find the sum of all two - digit natural numbers which are divisible by 3.​
kykrilka [37]

Answer:

1665

Step-by-step explanation:

This is AP, where:

  • First term is: 12= 3*4
  • Last term is: 99= 3*33
  • Common difference is: 3
  • Number of terms is: 33- 3= 30 (because the 4th term is included)
  • S=1/2*30(12+99)= 1665

The sum of all two - digit natural numbers which are divisible by 3 is 1665

3 0
3 years ago
Olivia is making 15 bead bracelets for her friends what is the proportional relationship?
yanalaym [24]

5 minutes per bracelet.

because 15/3 = 5 mins.

To find the constant of proportionality in minutes per bracelet, divide the total time by the number of bracelets:

constant of proportionality =15/3= 5 minutes.

Now, we're going to consider an example of a proportional relationship in our everyday life: When we put gas in our car, there is a relationship between the number of gallons of fuel that we put in the tank and the amount of money we will have to pay. In other words, the more gas we put in, the more money we'll pay.

Learn more about the proportional relationships at

brainly.com/question/12242745

#SPJ4

6 0
2 years ago
The correlation coefficient r between an employee’s age, x, and yearly salary, y, is 0.633. What percent of the variation in yea
son4ous [18]

Answer:

The answer is 40.1%

Step-by-step explanation:

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6 0
3 years ago
(3f–3)^2 pls help<br> aaaaaaaaaaaaaaaaaaaa
julia-pushkina [17]
9f^2-18f+9 is the answer
6 0
3 years ago
Suppose P(A) = 0.9, P(B) = 0.3, and P(B|A) = 0.2. What is P(A|B) ?
Elenna [48]

By definition of conditional probability,

P(B\mid A)=\dfrac{P(B\cap A)}{P(A)}\implies P(B\cap A)=0.2\cdot0.9=0.18

Similarly,

P(A\mid B)=\dfrac{P(A\cap B)}{P(B)}=\dfrac{0.18}{0.3}=0.6

6 0
4 years ago
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