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adell [148]
3 years ago
9

If the discriminant of a quadratic equation is equal to -8, which statement describes the roots?

Mathematics
2 answers:
Dovator [93]3 years ago
5 0

Keywords

quadratic equation, discriminant, complex roots, real roots

we know that

The formula to calculate the <u>roots</u> of the <u>quadratic equation</u> of the form  ax^{2} +bx+c=0 is equal to

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

where

The <u>discriminant</u> of the <u>quadratic equation</u>  is equal to

b^{2}-4ac

if  (b^{2}-4ac)> 0 ----> the <u>quadratic equation</u> has two <u>real roots</u>

if  (b^{2}-4ac)=0 ----> the <u>quadratic equation</u> has one <u>real root</u>

if  (b^{2}-4ac)< 0 ----> the <u>quadratic equation</u> has two <u>complex roots</u>

in this problem we have that

the <u>discriminant</u> is equal to -8

so

the <u>quadratic equation</u> has two <u>complex roots</u>

therefore

the answer is the option A

There are two complex roots

SVETLANKA909090 [29]3 years ago
3 0
Hello there, the correct answer is:

A.
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Hey there! can you please help me posted picture of question
Fiesta28 [93]
False.
 An exponential growth is a function of the form:
 y = A (b) ^ (k * t)
 Where,
 k> 0
 b> 1
 Because the value of b> 1 means that the function grows.
 Therefore, the answer to the question is false, because if k = 2 but b <1 then the function decreases.
 Answer:
 
False
7 0
3 years ago
Find the measure of &lt;_B (show work if possible)
Mandarinka [93]

Answer: <b is 59.3 degrees

Step-by-step explanation:

Triangles have total of 180 degrees

The bottom two points are both 4y

To solve: 4y+4y+(3y+14)=180

11y+14=180

-14

11y=166

Divide by 11

Y=15.1

So plug that in for y

3(15.1)+14=B

59.3

Hope this helped

Please mark Brainliest

;p

6 0
2 years ago
The domain of the functions in interval notation is?
sammy [17]

Answer:

the range of a function

Step-by-step explanation:

7 0
3 years ago
Seconds, meters minutes
DiKsa [7]

Answer:

Step-by-step explanation:

2.4x32=76.8

76,8/800=0.096

4 0
3 years ago
Help please it would help my grade alot
Alexxandr [17]

Answer:

It cooled 58.4 degrees

Step-by-step explanation:

T(t) = 68 + 144e ^(-.052t)

We want to find the value when t= 10

T(10) = 68 + 144e ^(-.052*10)

        = 68 +85.611

 T(10)         =153.611

We also need to know

T(0)= 68 + 144e ^(-.052*0)

       =68+144

        =212

We want to know how much it cools

That would be the temperature at  time 0 minus the temperature at  time 10


T(0) - T (10)

212-153.611

58.389

To the nearest tenth

58.4 degrees

3 0
2 years ago
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