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kramer
3 years ago
5

How many real roots does a quadratic equation have if the discriminant is -3?

Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
6 0

\bf \qquad \qquad \qquad \textit{discriminant of a quadratic} \\\\\\ y=\stackrel{\stackrel{a}{\downarrow }}{a}x^2\stackrel{\stackrel{b}{\downarrow }}{+b}x\stackrel{\stackrel{c}{\downarrow }}{+c} ~~~~~~~~ \stackrel{discriminant}{b^2-4ac}= \begin{cases} 0&\textit{one solution}\\ positive&\textit{two solutions}\\ negative&\stackrel{\textit{no real roots}}{\textit{no solution}}\quad \checkmark \end{cases}

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Jacob's little brother thinks that he could design a better lion enclosure than the one he sees at the zoo. He makes a drawing o
abruzzese [7]

Answer:

Step-by-step explanation:

<u><em>Length</em></u>

1 inch = 25 feet

7 1/4 inches = x feet

1 * x = 25 * 7 1/4

x = 25 * 7.25

Length = 181.25 feet

The length is 181.25

<em><u>hypotenuse length</u></em>

The diagonal = 10 1/2 inches

The diagonal = 10.5 inches

hypotenuse = 10.5 * 25 = 262.5 feet

<em><u>Width</u></em>

L^2 + W^2 = Diagonal^2

181.25² + W² = 262.5²

32851.5625 + W²  =  68906.25   Subtract 32851.5625 from both sides

W² =  68906.25 - 32851.5625

W^2 = 36054.6875                       Take the square root of both sides

W = 189.88

<u><em>Area</em></u>

Area = L * W

Area = 181.25 * 189.88

Area = 34415.88 square feet.

3 0
3 years ago
9 mugs for $45<br><br> What is the rate?<br><br> And what is the unit rate?
andrew-mc [135]

Answer:  The unit rate is $5 per  mug.

Step-by-step explanation:

To find the the unit rate, you will find the amount  one mug will cost.

If there are 9 mugs  then to get it to one, you will have to divide 9 by 9, and the same way you will have to divide 45 by 9.

45 / 9 = 5  

6 0
3 years ago
If r = 6 units and h = 13 units, what is the volume of the cylinder
Andrews [41]

Answer:

v=1460.26536188 units^3

Step-by-step explanation:

Volume for a cylinder is:

V=πr^2h

Substitute 6 in for r and 13 in for h

V=π(6^2)(13)

V=π(36)(13)

V=π468

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Hope this helps! :)

6 0
3 years ago
Help lol pleaseeeee<br> I don’t know what to do
Tanya [424]
I think the answer is 4

If my memory serves me right then you have to do Q3-Q1

This is 6-2

The answer would be 4


Hope this is right and it helps :)
5 0
3 years ago
Read 2 more answers
Alex made 36 cookies. 1/4 of the cookies were chocolate chip. 1/3 of the cookies were oatmeal. The rest of the cookies were pean
MatroZZZ [7]

Answer:

5

Step-by-step explanation:

number of chocolate chip cookies = 36 × ¼ = 9

number of oatmeal cookies = 36 × ⅓ = 12

36 - 9 - 12 = 15

Alex made 15 peanut butter cookies.

7 0
3 years ago
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