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3 years ago

Im not sure if i did it correct can someone help 5 minutes left

Mathematics

1 answer:

never [62]3 years ago

8 0

Answer:

i believe the answer is a

Step-by-step explanation:

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Which quadratic equation has the roots -1+4i and -1-4i

AysviL [449]

Answer:

Step-by-step explanation:

Solve the quadratic in answer choice C using the quadratic formula:

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}$ .

Here a=1, b=2, and c=17.

Substitute and you'll have:

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a} =\frac{-2+/-\sqrt{(-2)^2-4(1)(17)} }{2(1)}=\frac{-2+/-\sqrt{4-68}}{2)}$

$\frac{-2+/-\sqrt{-64} }{2}=\frac{-2+/-8i }{2}=-1+/- 4i$

6 0

4 years ago

Do u agree?I m not pretty sure

nika2105 [10]

It looks correct to me :)

6 0

3 years ago

Read 2 more answers

I really need help ............!!!!!!

IrinaK [193]

Answer:

49 minutes

Step-by-step explanation:

To find the average time the machine was down per day, we need to add up the total time taken and then divide by the number of days. Since there are 5 days, we have:

$\frac{50 + 30 + 100 + 25 + 40}{5}$

$= \frac{245}{5}$

= 49

So, the average time per day is 49 minutes.

Hope this helped! :)

3 0

3 years ago

I need help with this other 1 last question and that is it, I'll do the rest!

Setler79 [48]

Answer:

DO IT ON UR OWN EARTHLING

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

2|m-n2|+k3 (if k=-2,m=-7, and n=4)

Dafna11 [192]

Answer:

correction = 24

Step-by-step explanation:

2|-7-4*2| + -2 *3

2|-7-4*2| + -6

2|-7-8| + -6

2|-15| + -6

the 15 turn positive because of the |bars|

2x 15 30 - 6

= 24

5 0

3 years ago