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Amiraneli [1.4K]
4 years ago
14

Please help, I'm really confused

Mathematics
1 answer:
Sergeeva-Olga [200]4 years ago
7 0

Empirical probability is computed by running an experiment multiple times (in this case, asking the same question to many people), and then computing the ratio

\dfrac{\text{good cases}}{\text{all cases}}

In this case, 236 people over 991 said that they checked the portfolio daily, so the empirical probability is

P(\text{daily check})=\dfrac{236}{991}

Which you can round as 0.238, i.e. 23.8%.

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Integers are __________ whole numbers
KatRina [158]
Yes they are always whole numbers!
A. Always
8 0
3 years ago
What is x^2 = 2y when you have to make the subject x
algol13
X^2=2y
To get x on its own you would have to square root both sides so you would end up with:
x=sqrt(2y)
7 0
3 years ago
Find the standard deviation for the given sample data. Round your answer to one more decimal place than is present in the origin
Tema [17]

Answer:

s = 19.7

Step-by-step explanation:

First we need to calculate the mean x' of the sample as:

x'=\frac{55+18+39+20+20+44+69}{7}=37.9

We sum all the scores and divide them by the number of scores.

Then, the standard deviation s is calculated as:

s=\sqrt{\frac{(55-37.9)^2+(18-37.9)^2+(39-37.9)^2+(20-37.9)^2+(20-37.9)^2+(44-37.9)^2+(69-37.9)^2}{7-1} }\\ s=19.7

We square every score less the mean, sum every value, then divide that by the number of scores less 1 and finally, we calculate the square root.

So, the standard deviation of the sample is 19.7

8 0
4 years ago
Write the slope intercept form of the equation of the line through the given point with the given slope. Through (-5 -2) slope -
frez [133]

Answer:

  1. y = -3/5 × -5 - 2
  2. y = 2 × -1 + 2

Step-by-step explanation:

#1

  1. y = mx + b
  2. m = -3/5, x = -5, b = -2, y = y
  3. put in correct order

#2

  1. (2, -1) - (5,5) = 6/3 = 2/1 = 2 (remember, y is over x. The formula is y2 - y1 / x2 - x1)
  2. Pick either point given (2, -1) or (5, 5)
  3. Plug the point in
  4. y = y, m = 2, x = 2, b = -1
  5. Put in order
3 0
3 years ago
PLEASE HELP WORTH 40 POINTS FOR WHOEVER ANSWERS CORRECTLY!!!! PLEASE HELP
ANTONII [103]

Answer:

x = 1 ⇔ y = -2.4

x = 2 ⇔ y = -1.8

x = 3 ⇔ y = -1.2

x = 4 ⇔ y = -0.6

Step-by-step explanation:

3x-5y=15

→ Rearrange to make y the subject

-5y=-3x+15

→ Multiply everything by -1

5y=3x-15

→ Divide everything by 5

y=0.6x-3

⇒ Substitute x = 1, 2, 3 and 4

y=0.6x-3\\ y=(0.6*1)-3\\ y=0.6-3\\ y=-2.4\\(1,-2.4)

y=0.6x-3\\ y=(0.6*2)-3\\ y=1.2-3\\ y=-1.8\\(2,-1.8)

y=0.6x-3\\ y=(0.6*3)-3\\ y=1.8-3\\ y=-1.2\\(3,-1.2)

y=0.6x-3\\ y=(0.6*4)-3\\ y=2.4-3\\ y=-0.6\\(4,-0.6)

4 0
3 years ago
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