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Zina [86]
2 years ago
5

How are -1+2i and -1-2i solutions to x^2+2x+5=0

Mathematics
1 answer:
Nikolay [14]2 years ago
6 0

Step-by-step explanation:

just applieng quadratic form

- b  ±\frac{ \sqrt[2]{ {b}^{2}  -  4ac} }{2a}

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Pls answer <br><br><br> Math-iready
Ymorist [56]

Answer:

1  - Variable

2 - Corfficient

3 - Term

4 - Constant

Step-by-step explanation:

So, I am pretty srue the way the boxes are now is the correct way already. (I should be wrong?)

4 0
2 years ago
Y = -3x - 13<br> 9x - 2y = -4
Eddi Din [679]

Answer

6

Step-by-step explanation:

5 0
2 years ago
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How is an equation like a balance scale!?! please make the response short and easy to understand !!
Sauron [17]
You have to equal out each side to fine the value of the variable.

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5 0
3 years ago
Quick algebra 1 question for 10 points!
NeTakaya

Answer:

12.50h = 2500.75

Step-by-step explanation:

He earned $12.50 for 1 hour of work.

For 2 hours, he earned $12.50 × 2.

For 3 hours, he earned $12.50 × 3.

For h hours, he earned $12.50 × h which can be simply written as 12.50h

He earned altogether $2500.75, so 12.50h must equal 2500.75.

Answer: B 12.50h = 2500.75

4 0
1 year ago
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Sally can paint a room in 9 hours while it takes Steve 3 hours to paint the same room. How long would it take them to paint the
Archy [21]
You can solve this one by adding their rates, but you have to invert the numbers they give you to find the rate. Rate is measured in something per unit of time, and "per" indicates division. So the rates are: 1/3 of an hour (Sally) and 1/6 of an hour (Steve). So add the rates: 1/3 + 1/6 = 1/2. (1/3 is 2/6, and 2/6 + 1/6 = 3/6). Since their combined rate is 1/2 of a room in one hour, it takes them two hours to paint the room.

This answer makes sense: It takes Sally three hours by herself; with Steve's help, she's faster, but not THAT much faster, because he's pretty slow. You can often spot-check word problem answers like this by giving it a common sense once-over. If we came up with four hours, that would clearly be wrong: it should take her LONGER if she's getting help.
7 0
2 years ago
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