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RideAnS [48]
3 years ago
14

Please help me figure this out! Thank you so much :( i really need it! ❤️

Mathematics
1 answer:
Hoochie [10]3 years ago
8 0

Answer:

  \textbf{A. }x=2i\text{ or }x=-2i\\\\\textbf{B. }(x+2i)(x-2i)

Step-by-step explanation:

The quadratic can be solved in a straightforward way:

  x^2+4=0\\\\x^2=-4\qquad\text{subtract 4}\\\\x=\pm\sqrt{-4}\qquad\text{take the square root}\\\\x=\pm2i\qquad\text{simplify}

This tells you that the solutions are ...

  2i or -2i

__

For each root of "a", (x -a) is a factor. Thus the factors of the equation are ...

  (x +2i)(x -2i)

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Please help u have to factor
enot [183]
Both terms have a -m^2n in common, so we can pull it out. The factored form will be -m^2n times whatever is left after pulling it out.

In the first term, we will have just 8 left since everything else in the term is factored out.

The second term has a 7m^4n^3 left. Notice that both of these terms no longer have a negative sign since the negative was factored out.

The answer is (-m^2n)(8+7m^4n^3)
8 0
3 years ago
It took a car 4 days to travel 4717 miles. What was this car’s average speed, in miles per hour? (Round to the nearest per hour)
KiRa [710]

Answer:

51 MPH

Step-by-step explanation:

4 days is 96 hours, all you have to do is 4717/90

which is 51.41111 (with the 1 repeating) rounded to the nearest MPH (Nearest whole number) is 51

4 0
3 years ago
If P(event A) = 0.25, what is P(not event A)?
xz_007 [3.2K]

Answer:

0.75

Step-by-step explanation:

The probability of P(not event a) is equal to 1-p(event A)

3 0
3 years ago
What is -7(w+6)^2+21=0.​
adoni [48]
After solving for w using inverse operations, w would have to equal 5.74 to make this equation true.
8 0
3 years ago
Q12.
SVEN [57.7K]

Answer:

Step-by-step explanation:

1l ........8.5 miles

x l .......6 miles

-----------------------

x=6*1/8.5

x=0.70 l

2*0.7=1.4 l petrol/day ( to work and come back home)

5*1.4=7 l/week ( 5 days works in a week)

7*1.26=8.82 L /week

8.82>8.5

The petrol costs more

So the answer is NO

6 0
3 years ago
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