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4 years ago

A number written in the form a + bi is called a _____ number.

Mathematics

2 answers:

worty [1.4K]4 years ago

6 0

Complex because i is the symbol of imagenory number -1

Debora [2.8K]4 years ago

3 0

The correct answer to this question is letter "A. complex." A number written in the form a + bi is called a complex number. The "i" part is the imaginary part of that expression, which is complex. Imaginary numbers are complex and it's hard to evaluate, sometimes.

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Andy has an hour to study for French exam. It takes him five minutes to write a practice essay and six minutes to review the voc

Vitek1552 [10]

Answer: Andy can review 5 vocabulary lessons (30 minutes) and write 6 practice essays (30 minutes). Before his French Exam.

I almost did 7 minutes per practice essay ^^’

Step-by-step explanation:

I don’t really know how to do math much. But all I did was add 5 till I got to 30, then I added 6 to that until I got 60

Hope this helped

EDIT: Idk if this was right so,,,,

4 0

3 years ago

Find the value of the expression log27√3

slega [8]

$\log _{ 27 }{ \left( \sqrt { 3 } \right) } \\ \\ =\frac { \log _{ 3 }{ \left( \sqrt { 3 } \right) } }{ \log _{ 3 }{ \left( 27 \right) } }$

$\\ \\ =\frac { \log _{ 3 }{ \left( { 3 }^{ \frac { 1 }{ 2 } } \right) } }{ 3 } \\ \\ =\frac { \frac { 1 }{ 2 } \log _{ 3 }{ 3 } }{ 3 } \\ \\ =\frac { \frac { 1 }{ 2 } }{ 3 }$

$\\ \\ =\frac { 1 }{ 2 } \cdot \frac { 1 }{ 3 } \\ \\ =\frac { 1 }{ 6 }$

5 0

4 years ago

Read 2 more answers

Abigail orders a large 2 topping pizza for $14 and a medium 1 topping pizza for$10. If all costs of a medium pizza are 80% of a

viktelen [127]

Hello!,

FRIST :<span> </span><span>2 topping - $14
1 topping - $10

1 topping is $4. (You find the difference between the two.)
That means that a medium pizza, with no toppings is worth $6.
So for a large plain cheese pizza -
$6.00/10x8 [80%]
= 2.40
So, a large cheese pizza would cost [$6.00+$2.40] $8.40.

I wouldn't think there would be a difference in the surcharge for a toppings. But!
1 topping is $4.
4/10*8=0.4
So the large topping would cost [$4.00+$0.40] $4.40 THANK YOU!</span>

8 0

3 years ago

When Ryan is serving at a restaurant, there is a 0.75 probability that each party will order drinks with their meal. During one

Triss [41]

Answer:

0.82 = 82% probability that at least one party will not order drinks

Step-by-step explanation:

For each party, there are only two possible outcomes. Either they will order drinks with their meal, or they will not. The probability of a party ordering drinks with their meal is independent of other parties. So the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

When Ryan is serving at a restaurant, there is a 0.75 probability that each party will order drinks with their meal.

This means that $p = 0.75$

During one hour, Ryan served 6 parties. Assuming that each party is equally likely to order drinks, what is the probability that at least one party will not order drinks?

6 parties, so n = 6.

Either all parties will order drinks, or at least one will not. The sum of the probabilities of these events is decimal 1. So

$P(X = 6) + P(X < 6) = 1$