3 years ago

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

Mathematics

1 answer:

Nikolay [14]3 years ago

6 0

Step-by-step explanation:

just applieng quadratic form

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

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The temperature at 6:00 A.M. 58 degrees Fahrenheit. The temperature increased at a constant rate of 3 degrees Fahrenheit every h

Tasya [4]

Answer: $c. (t:58\leq t\leq 70)$

Step-by-step explanation:

given data:

T = 58 degree Celsius.

changes in temperature = 3dregres every hour = 4.

solution:

$t=58+3h\\where h = 4$

substitute the value for h into the equation.

$t=58+3(4)\\t=58+12\\t=70$

the set with $58\leq t\leq 70$ best represents the function range.

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3 years ago

What is the sum of the angle measures of 24 - gon

Wewaii [24]

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3 years ago

Which rotation about its center will carry a regular decagon onto itself?

il63 [147K]

Answer:

D.252

Step-by-step explanation:

In this question, We have to find which rotation about its center will carry a regular decagon onto itself?

A decagon : 10 sided polygon

As we know, a full rotation can be 360°.

For a decagon: 360/10 =36

For a decagon, any multiple of 36 can map onto itself.

In our options only 252 is the multiple of 36.

So, correct answer is option D 252

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3 years ago

Not sure need help

Arte-miy333 [17]

Answer:

The answer is 504 ft ^3 check my solution

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3 years ago

Felix can grow 6 plants with every seed packet. Write an equation that shows the relationship between the number of seed packets

Solnce55 [7]

Answer:

I believe it’s:

Y= 6x

Step-by-step explanation:

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3 years ago