3 years ago

Find the product and fill in the blanks to write in standard complex number form

1 answer:

3 0

X^2 +2x +10 = 0

D = 4 -40 = - 36

x_1,2 = (-2 +/- sqrt(-36))/2 = (-2 +/- 6i)/2 = 2(-1 +/- 3i)/2 = -1 +/- 3i

x_1,2 = -1 +/- 3i or more understandably

x_1 = -1 -3i and x_2 = -1 +3i

hope this will help you

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Rita works 1234 hours in her first week at a new job. She works 1514 hours in the second week. How many more hours does Rita wor

Sphinxa [80]

Answer:

280

Step-by-step explanation:

1514-1234 = 280

8 0

3 years ago

what is the solution to this system of equations (Use the elimination method by multiplying the first equation by 3.) 2x+y=20 6x

user100 [1]

Answer:

(7, 6)

Step-by-step explanation:

multiply first eq. by 3 to get 6x - 3y = 60

now do

6x + 3y = 60

- 6x - 5y = 12

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8y = 48

solve for y: y = 6

with this y value, plug it in to the first equation (easier to solve) and get 2x + 6 = 20

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3 years ago

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Marina CMI [18]

Answer:

11 years old

Step-by-step explanation:

3 years ago, Gloria was 32 years old

If Ivana's age is = x

Then, 4x = 32

x = 8

3 years ago, Ivana was 8 years old

So now she is 11 years old.

4 0

3 years ago

A sum of money is divided between A,B and C in the ratio 9:8:7. If the total sum of money shared is 480. How much money does A r

mr Goodwill [35]

Given:

A sum of money is divided between A,B and C in the ratio 9:8:7.

Total sum is 480.

To find:

The part of money A get.

Solution:

Let A, B and C get 9x, 8x and 7x respectively.

Total sum is 480.

$9x+8x+7x=480$

$24x=480$

Divide both sides by 24.

$x=\dfrac{480}{24}$

$x=20$

Now,

$A\ get =9x$

$A\ get =9(20)$

$A\ get =180$

Therefore, amount received by A is 180.

6 0

3 years ago

Can someone please help with this one

bagirrra123 [75]

Answer:

m∠8 = 123°

Step-by-step explanation:

<em>∠1 and ∠8 are alternate exterior angles</em>, and since lines A and B are parallel, then <em>they must be congruent</em>.

So, m∠1 = m∠8

Substitute: 123 = m∠8

7 0

3 years ago