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2 years ago

Please help me i have limited time and im confused

Mathematics

1 answer:

luda_lava [24]2 years ago

4 0

The expected value is $8,000.

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Arnold took a tray of cookies to a party 90% of the cookies were eating only these 5 remain

e-lub [12.9K]

Answer:

50 in total, 45 were eaten

Step-by-step explanation:

If there's only 10% left and 10% is 5 cookies, then that means for every 10% is 5 cookies so 90 x 5 = 45

8 0

3 years ago

Which of the following equations have complex roots?

mestny [16]

Answer:

Step-by-step explanation:

Complex roots of quadratic functions occur when the <u>discriminant is negative</u>.

<u>Discriminant</u>

$b^2-4ac\quad\textsf{when}\:\:ax^2+bx+c=0$

Evaluate the discriminant of each of the given equations.

$\textsf{A.} \quad 3x^2+2=0$

$\implies a=3, \quad b=0, \quad c=2$

$\implies b^2-4ac=0^2-4(3)(2)=-24$

As -24 < 0 the equation will have complex roots.

$\textsf{B.} \quad 2x^2+1=7x$

$\implies 2x^2-7x+1=0$

$\implies a=2, \quad b=-7, \quad c=1$

$\implies b^2-4ac= (-7)^2-4(2)(1)=41$

As 41 > 0 the equation does not have complex roots.

$\textsf{C.} \quad 3x^2-1=6x$

$\implies 3x^2-6x-1=0$

$\implies a=3, \quad b=-6, \quad c=-1$

$\implies b^2-4ac=(-6)^2-4(3)(-1)=48$

As 48 > 0 the equation does not have complex roots.

$\textsf{D.} \quad 2x^2-1=5x$

$\implies 2x^2-5x-1=0$

$\implies a=2, \quad b=-5, \quad c=-1$

$\implies b^2-4ac=(-5)^2-4(2)(-1)=33$

As 33 > 0 the equation does not have complex roots.

Learn more about discriminants here:

brainly.com/question/27444516

brainly.com/question/27869538

Learn more about complex roots here:

brainly.com/question/26344541

6 0

2 years ago

PLEASE HELPP WILL MARKDOWN BRAINLIEST!!

Nastasia [14]

Answer:

it has infinite solutions because the lines wont end.

Step-by-step explanation:

6 0

2 years ago

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Please help me out ASAP!!!!!!!!

olga55 [171]

Answer:

It is because the red disks were more than the other disks before the pupils added other disks.

6 0

3 years ago

How do you estimate a whole number 3,576

frozen [14]

By dividing it by a number that = to it

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3 years ago

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