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3 years ago

What is the solution set of x2 + 5x - 5 = 0?

Mathematics

1 answer:

Llana [10]3 years ago

4 0

If you're completing the square the answer is in the image.

expression

x^2 + 5x - 5=ax^2+bx+c

a=1, b=5, c=-5, and you can solve it that way.

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Simplify the expression.

Sloan [31]

1) 16n - 5
2) 4a + 3b
3) -3c + 27 + 4d
4) 2x - 7y + 3
5) 21x + 14x(second power)

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3 years ago

What is p(tails)? Write your answer as a percentage

Tamiku [17]

Answer: 50%

There are 2 sides, one of which is tails, so
P(tail) = 1/2 = 0.50 = 50%

6 0

2 years ago

The authors of a paper presented a correlation analysis to investigate the relationship between maximal lactate level x and musc

ArbitrLikvidat [17]

Answer:

a) Sample correlation coefficient, r = 0.7411

bi) test statistic, t = 4.102

bii) P-value = 0.000736

Step-by-step explanation:

a) The formula for the sample correlation coefficient is given by the formula:

$r = \frac{S_{xy} }{\sqrt{S_{xx} S_{yy} }} }$

$S_{xx} = 2,648,130.357\\S_{yy} = 36.7376,\\S_{xy} = 7408.225$

$r = \frac{7408.225}{\sqrt{2648130.357*36.7376} }$

r = 0.7511

i) formula for the test statistic is given by the formula:

$t = \frac{r\sqrt{n-1} }{\sqrt{1 - r^{2} } }$

sample size, n = 4

$t = \frac{0.7511\sqrt{14-1} }{\sqrt{1 - 0.7511^{2} } }$

t = 4.102

ii) Degree of freedom, df = n -2

df = 14 -2

df = 12

The P-value is calculate from the degree of freedom and the test statistic using excel

P-value =(=TDIST(t,df,tail))

P-value = (=TDIST(4.1,12,1)

P-value = 0.000736

4 0

2 years ago

Please answer correctly

Vedmedyk [2.9K]

Answer:

Step-by-step explanation:

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3 years ago

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A playground is shaped like a rectangle with a width 5 times it’s length. What is the simplified expression for the distance bet

Bad White [126]

Width: W
length: L = 5W

Use the Pyth. Theorem to find the length of the diagonal:

|D| = sqrt(W^2 + [5W]^2) = sqrt(W^2 + 25W^2) = sqrt(26W^2), or

Wsqrt(26) (ans.)

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2 years ago

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