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Lena [83]
3 years ago
16

The first few steps in deriving the quadratic formula are shown. A table listing the first few steps in deriving the quadratic f

ormula Which best explains why is not added to the left side of the equation in the last step shown in the table? The term StartFraction b squared Over 4 a squared EndFraction is added to the right side of the equation, so it needs to be subtracted from the left side of the equation to balance the sides of the equation. The distributive property needs to be applied to determine the value to add to the left side of the equation to balance the sides of the equation. The term StartFraction b squared Over 4 a squared EndFraction needs to be converted so it has a common denominator before adding it to the left side of the equation to balance the equation. The square root of the term needs to be found before adding the term to the left side of the equation to balance the sides of the equation.
Mathematics
1 answer:
Nimfa-mama [501]3 years ago
5 0

The answer is C

Step-by-step explanation:

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Find the variance of this probability distribution. Round to two decimal places.​
attashe74 [19]

Answer:

Variance = 4.68

Step-by-step explanation:

The formula for the variance is:

\sigma^{2} =\frac{\Sigma(X- \mu)^{2}}{N} \\or \\ \sigma^{2} =\frac{\Sigma(X)^{2}}{N} -\mu^{2} \\

Where:

X: Values \\\mu: Mean \\N: Number\ of\ values

The mean can be calculated as each value multiplied by its probability

\mu = 0*0.4 + 1*0.3 + 2*0.1+3*0.15+ 4*0.05=1.15

\frac{\Sigma (X)^{2}}{N} =\frac{(0^{2}+1^{2}+2^{2}+3^{2}+4^{2})}{5} =6

Replacing the mean and the summatory of X:

\sigma^{2} = \frac{\Sigma(X)^{2}}{N} -\mu^{2} \\= 6 - 1.15^{2}\\= 4.6775

4 0
3 years ago
Pls pls help me I will mark you brainest
Ann [662]

Answer:

130

Step-by-step explanation:

10+10+5+5=30

50+50=100

30+100=130

5 0
3 years ago
A small company's net income for the first six months of the year was 76,500 and for the last six months it was $100,000. What i
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3 0
3 years ago
Write y=1/6+4 in standard form using integers.
AveGali [126]
M is 1/6 and the b is +4
3 0
3 years ago
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faltersainse [42]

Answer:

le queda -2

Step-by-step explanation:

porque 23.500 - 12.000 = 11.5 - 13.500 = -2

8 0
3 years ago
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