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AnnZ [28]
3 years ago
5

Identify the values of a, b, and c in the following quadratic equation. 3

ormula1" title="x^{2}" alt="x^{2}" align="absmiddle" class="latex-formula"> - 2x + 5 = 0
a =?
b =?
c =?
Mathematics
1 answer:
NeX [460]3 years ago
6 0

Answer:

a = 3

b = -2

c = 5

Step-by-step explanation:

The general form of a quadratic equation is ax² + bx + c = 0.

3x² - 2x + 5 = 0

The value of a is 3.

The value of b is -2.

The value of c is 5.

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A consumer organization inspecting new cars found that many had appearance defects (dents, scratches, paint chips, etc.). While
Murljashka [212]

Answer:

The expected number of appearance defects in a new car  = 0.64

standard deviation = 0.93(approximately)

Step-by-step explanation:

Given -

7% had exactly three, 11% exactly two, and 21% only one defect in cars.

Let X be no of defects in a car

P(X=3) = .07 , P(X=2) = .11 , P(X=3) = .21

P(X=0 ) = 1 - .07 - .11 - .21 = 0.61

The expected number of appearance defects in a new car =

E(X) = \nu = = \sum X P(X) =3\times 0.07 + 2\times0.11 + 3\times0.21 + 0\times0.61 = 0.64

\sigma^{2}  = variation of E(X) = \sum (X - \nu) ^{2}P(X) = (3 - 0.64) ^{2}\times0.07 + (2 - 0.64) ^{2}\times0.11 + (1 - 0.64) ^{2}\times0.21 + (0 - 0.64) ^{2}\times0.61

 = (2.36) ^{2}\times0.07 + (1.36) ^{2}\times0.11 + (.36) ^{2}\times0.21 + ( 0.64) ^{2}\times0.61 = 0.8704

standard deviation  =  \sqrt{\sigma^{2}} = \sqrt{0.8704^{2}} = 0.93(approximately)

4 0
3 years ago
У
jasenka [17]

Answer:

oops! it's too hard!!

i think i should need to do first so that i could provide you correct answer of it!!

5 0
3 years ago
Penelope has been practicing driving a golf ball. The lengths of her first 3 drives are shown below: • Drive 1: 180 yards • Driv
disa [49]

Answer:

The answer is "183  yards"

Step-by-step explanation:

Drive \ 1= 180 \ yards \\\\Drive \ 2= 170 \ yards\\\\ Drive\ 3= 195 \ yards \\\\Drive \ 4= x \ \ yards \\\\

Using formula:

\to \text{average of number}=\frac{sum \ of \ number}{total\ number}\\\\\to 182 =\frac{180+170+195+x}{4}\\\\\to 4 \times 182 =545+x\\\\\to x= 728-545\\\\\to x=183

3 0
3 years ago
Rob Polanski is a tractor salesman. Last week his total sales amounted to $38,642.00, and he received $2,704.94 in commission. W
Alexeev081 [22]

To find the rate of commission, divide the amount of commission by his total sales:

2704.94 / 38642.00 = 0.07 = 7%

The answer is D. 7%

7 0
3 years ago
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Ohhhhh! I have a math Brainliest
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B. 
B.
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4 years ago
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