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dybincka [34]
3 years ago
13

Simplify: 9i(2+3i) enter your answer, in standard form, in the box ___

Mathematics
2 answers:
harina [27]3 years ago
8 0
-54......................
Temka [501]3 years ago
4 0

Answer:

Standard form is 9(2i-3) or (-27+18i)

Step-by-step explanation:

To solve these type of question we should always keep in mind that i= √(-1)

and i² = (-1)

We have to solve the given form 9i(2+3i).

Now we start solving the question by simplifying the factors

9i(2+3i) = 18i+27i²

⇒ 18i +27(√-1)²

⇒18i +27(-1)

⇒18i-27

⇒9(2i-3)

So the simplified for is 9(2i-3) or (-27+18i)


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Jamie's older brother and his three friends want to split the cost of lunch they also want to leave a 15% tip how much should ea
goldfiish [28.3K]
Answer:
$22.43

Explanation:
We can start by finding the amount that they should tip. The total bill is $78, so we should take 15% of 78 and add it to the total.
0.15 * 78 = 11.7
78 + 11.7 = 89.7
This means that the total cost of the bill, with a tip, is $89.70.
Since there are 4 people, we have to split this total into 4 if they all want to pay equally.
89.70 / 4 = 22.425 = $22.43 !

Hope this helps
4 0
2 years ago
To download movies off the internet, you must pay $1.99 per movie, plus a onetime fee of $5.50. Which expression shows the total
daser333 [38]

There's no expressions shown

7 0
3 years ago
Read 2 more answers
A bill for the repair of a laptop was $249. The cost of the parts was $84, and the labor charge was $55 per hour. How many hours
jek_recluse [69]
3 hours.
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6 0
3 years ago
The events A and B are mutually exclusive. If ​P(A)=0.1 and ​P(B)=0.4​, what is​ P(A or​ B)? ASAP
Gemiola [76]

Answer:

Given that the events A and B are mutually exclusive.

P(A) = 0.1

P(B) = 0.4

Mutually Exclusive Events: When two events are Mutually Exclusive it is impossible for them to happen together i.e

If A and B are two events then; P(A and B) = 0

then;

P(A or B) = P(A) +P(B)

By the definition of mutually exclusive events;

P(A or B) = P(A) +P(B)                     ......[1]

Substitute the values of P(A) = 0.1 and P(B) = 0.4 in [1] we have;

P(A or B) = P(A) +P(B) = 0.1+0.4 = 0.5




6 0
3 years ago
4213 to 3 significant figures
Oxana [17]
Into 3 significant figures=4210
3 0
2 years ago
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