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4 years ago

Perform the indicated operation and write the results in the form a+bi

Mathematics

1 answer:

sasho [114]4 years ago

5 0

$i=\sqrt{-1}\to i^2=-1\\\\i^{84}=i^{2\cdot42}=(i^2)^{42}=(-1)^{42}=1$

Answer: b. 1

Used:

$(a^n)^m=a^{nm}$

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Can anyone help me with this? Thanks!

Katarina [22]

Answer:

Step-by-step explanation:

5^2+8^2=c^2

25+64=89

89=c^2

square root of 89 is 9.43

9.43=the square root of c^2

6 0

3 years ago

A scientist used 786 milliliters of a liquid for an experiment. How many liters of the liquid did the scientist use for this exp

Charra [1.4K]

Answer:

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

(x2-25)÷(x-5) plz help me

saw5 [17]

Answer:

(x + 5)

Step-by-step explanation:

(x² - 25) ÷ (x-5)

=(x² - 5²) ÷ (x-5)

Using the formula a² - b² = (a + b)(a - b) you get

= (x + 5)(x - 5) ÷ (x - 5)

With division you can cut both (x - 5)

So the answer is (x + 5)

4 0

3 years ago

A number,p, is multiplied by -3/4 what is the value of p if the product is -0.6

hoa [83]

The value of p is -1.25

-3/4 · p = -0.6

-3/4p ÷ -3/4 = -0.6 ÷ -3/4

p= -1.25

8 0

3 years ago

The number of people who attend a concert varies directly with the amount of money spent on advertising. If 790 tickets are sold

tangare [24]

Answer:

$4837.5

Step-by-step explanation:

Given that,

790 tickets are sold when $2,547.75 is spent on advertising.

We need to find the money to be spent on advertisements to get a sellout crowd of 1500.

It is also mentioned that the number of people who attend a concert varies directly with the amount of money spent on advertising. Let money be x. So,

$\dfrac{790}{2547.75}=\dfrac{1500}{x}\\\\x=\dfrac{2547.75\times 1500}{790}\\\\x=\$4837.5$

So, $4837.5 is spent on advertisements to get a sellout crowd of 1500

3 0

3 years ago