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salantis [7]
3 years ago
8

PLS HELP WILL MARK BRAINLIEST IM SO CLOSE TO FINISHING

Mathematics
2 answers:
Umnica [9.8K]3 years ago
5 0
17/18 is the right answer
Tom [10]3 years ago
3 0
The answer is the 3 one
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Solve the following quadratic by completing the square.
lianna [129]

Answer:

x  = -5 \pm  \sqrt{26}

Step-by-step explanation:

x^2+10x-1=0\\\\\implies x^2+2\cdot 5 x +5^2-5^2-1=0\\\\\implies (x+5)^2-25-1=0\\\\\implies (x+5)^2 -26=0\\\\\implies (x+5)^2 = 26\\\\\implies x +5 = \pm\sqrt{26}\\\\\implies x  = -5 \pm  \sqrt{26}

4 0
2 years ago
If x is the probability of an event happening, then which of the following represents
Elena-2011 [213]

Answer:

the last one is the answer!

7 0
3 years ago
how many different combinations are possible if four itemsare drawn from a group of seven different items
laiz [17]
You would just do 4 x 7, which means there are 28 combinations.
7 0
3 years ago
Which equation is true when m = 4?
Luba_88 [7]
The correct answer is A and B because if you replace the m's with 4 than you do get the answer at the end of the equation.  Hope this helps.
4 0
3 years ago
Given here are a set of sample data: 12.0, 18.3, 29.6, 14.3, and 27.8. the sample standard deviation for this data is equal to _
disa [49]
The answer is 7.9306

Using the formula in the attached:
Where: xi = sample value; μ = sample mean; n = sample size

1.) Calculate the mean first:
μ = 12.0 + 18.3 + 29.6 + 14.3 + 27.8 / 5
   = 102 / 5
μ = 20.4

2.) Using the mean, calculate (xi - μ)² for each value:
(12.0 - 20.4)² = 70.56
(18.3 - 20.4)² = 4.41
(29.6 - 20.4)² = 84.64
(14.3 - 20.4)² = 37.21
(27.8 - 20.4)² = 54.76

3.) Sum the squared differences and divide by n - 1.
μ = 70.56 + 4.41 + 84.64 + 37.21 + 54.76
   = 251.58 / 5-1
μ = 62.895 (this is now called sample variance)

4.) Get the square root of the sample variance:
 √62.895 = 7.9306

3 0
3 years ago
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