3 years ago

When 3+4i2+i is expressed in the form a+bi, what is the value of a?

1 answer:

7 0

Multiplying and dividing with conjugate of 2+i in the given expression, we get(3+ 4i)(2-i)/(2+i)(2-i)=(6-3i+8i-4i^2)/(4-i^2)=(10+5i)/(4+1)=(10+5i)/5=2+i=a+bi<span>Thus a=2</span>

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5) Allison plays a card game. She picks a card at random. Then without putting

SashulF [63]

Answer:

1/51

Step-by-step explanation:

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3 years ago

Rasheed bought two kinds of candy bars, chocolate and toffee, that came in packages of 2 bars each. He handed out 2/3 of the cho

Contact [7]

Answer:

9 packages of chocolate bars

Step-by-step explanation:

Let he bought c packages of chocolate bars and t packages of toffee bars,

Since, he bought 1 fewer package of chocolate bars than toffee bars.

⇒ c = t - 1 -----(1)

Also, he handed out out $\frac{2}{3}$ of the chocolate bars and $\frac{3}{5}$ of the toffee bars,

If he handed out the same number of each kind of candy bar.

$\implies \frac{2}{3}\times c=\frac{3}{5}\times t$

$10c = 9t$ ( By cross multiplication )

$\implies t=\frac{10}{9}c$ ( Division property of equality )

From equation (1),

$c=\frac{10}{9}c-1$

$1=\frac{10}{9}c-c$

$1=\frac{10c-9c}{9}$

$1=\frac{c}{9}$

$\implies c = 9$

Hence, he bought 9 packages of chocolate bars.

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3 years ago

21 = m + 9 m = 11 is it a solution

Zarrin [17]

No because 21=(11)+9
21 can’t equal to 20

7 0

3 years ago

Two brothers have a total age of 28 if one brother is older by 20 years how old is the second brother

svlad2 [7]

Answer:

Step-by-step explanation:

Total meaning addition, you would use the opposite operation to find the answer.

28 - 20 = 8

And to check your work you would add;

20 + 8 = 28

which is the brothers total combined age.

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3 years ago

Read 2 more answers

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C.) 4(2x-6) and 8x-24

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3 years ago