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astra-53 [7]
3 years ago
13

What are the solutions of x^2 + 121 = 0?

Mathematics
2 answers:
dlinn [17]3 years ago
5 0
The answer would be D. -11i and 11i
Novosadov [1.4K]3 years ago
4 0
To solve this question you need to set up the equation and simplify
x^2 +121 = 0     you need to get the x^2 by itself so subtract 121
x^2 = -121   Now take the square root of both sides. but you can;t take the square root of a negative number which is where the i comes into play. 
 x= + -  11 i 


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I need another opinion ΔΔΔΔ
Cloud [144]
The answer should be c hope this helps

5 0
3 years ago
Read 2 more answers
Round the following numbers to the nearest 10. The numbers they have is 13,21,29
earnstyle [38]

Answer:

13: 10

21: 20

29: 30

Step-by-step explanation:

5 0
3 years ago
Dustin has only nickels and quarters in his piggy bank. He has 49 coins total for a combined value of $8.85. How many of each ty
eduard
Well obviously quarters equal 25 cents.  So you have to divide the 8.85 by 25 first.  That means he could have 35 quarters.  That least the rest as being dimes.  So find the remaining amount of the 8.85.  If you have 35 quarters that's $8.75.  And 8.85 minus 8.75 is 10 cents.  which would be 2 nickels.  That only adds up 37 coins.  So you break down one of the 25.  That would mean 5 more coins could be nickels.  Add 37 and 5 to get 42.   Do it again.  25 cents in nickels would be 5 more coins.  would be 46.  that would be missing 2 coins. But don't forget you're also subtracting from the 35 quarters. Now you would technically have 12 nickels and 33 quarters.  So you can do it one more time.  32 quarters means there is $8 in quarters at this point.

Now add you have 12 nickels, and you made 5 more.  That's 17 nickels.  That equals 85 cents.  So add 17 and 32 to be sure you have 49 coins, which you do. 


So 17 nickels, 32 quarters to equal 49 coins and $8.85

(sorry some of it got mixed up above because I was forgetting to subtract the quarters from the total as I changed them to nickels, so pay attention to the end)
8 0
3 years ago
I dont the know the answer to c-d=b for c
Vinvika [58]
C-d=b add to both sides d and will get 

c-d+d=b+d

c=b+d

hope helped 
4 0
3 years ago
Divide -6/7 by 2/-3 please give answer very fast its urgent
defon

Answer:

0.14285714285

Step-by-step explanation:

divide on calculator and make sure to have negative sign before three, remember you are dividing fractions

I hope it helps! If not sorry :(

3 0
3 years ago
Read 2 more answers
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