1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
skad [1K]
3 years ago
11

Can someone plz explain to me when to use an open and closed dot

Mathematics
1 answer:
balandron [24]3 years ago
5 0

closed dot is if the number is part of the solution so if it is equal to

 and

use open if it is not part of solution as in if it is greater than or less than

 so for your picture x greater or equal to -2 it would be a closed dot

You might be interested in
Determine if the statement below is always true, sometimes true, or never true. When x is a
Akimi4 [234]

Answer:

sometimes true

Step-by-step explanation:

if x is a positive integer the statement is true, if x is negative integer the statement will be false.

6 0
2 years ago
Read 2 more answers
Evaluate 3 to the 2nd power + (8-2)•4-6/3
erma4kov [3.2K]
3^{2}+(8-2)×4-6/3

Always do what's in parentheses first:

3^{2}+6×4-6/3

Then do multiplication and division:

9+24-2

Then addition and subtraction last:

9+24-2=31
8 0
3 years ago
a rectangle has a perimeter of 88cm. if the height is three times the length of the width what are the dimensions of the rectang
fredd [130]

Answer:

P=88. L=3w

P= 2(w)+2(L)

Then substitute the values into the equation

88=2w+2(3w)

Then solve for w and its length which is 3w

5 0
3 years ago
PLEASE HELP ME ALL 3 THIS QUESTION! (you just need to check my answer is right or wrong)
inna [77]

Answer:

1 and 3 is right and I’m pretty sure 2 is right also.

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
The travel time on a section of a Long Island Expressway (LIE) is normally distributed with a mean of 80 seconds and a standard
user100 [1]

Answer:

The travel time that separates the top 2.5% of the travel times from the rest is of 91.76 seconds.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 80 seconds and a standard deviation of 6 seconds.

This means that \mu = 80, \sigma = 6

What travel time separates the top 2.5% of the travel times from the rest?

This is the 100 - 2.5 = 97.5th percentile, which is X when Z has a p-value of 0.975, so X when Z = 1.96.

Z = \frac{X - \mu}{\sigma}

1.96 = \frac{X - 80}{6}

X - 80 = 6*1.96

X = 91.76

The travel time that separates the top 2.5% of the travel times from the rest is of 91.76 seconds.

3 0
2 years ago
Other questions:
  • The base of a triangle is three times it's height. If the area of a triangle is 54 square inches ,find its height.
    5·1 answer
  • Written Response! Please help!
    8·1 answer
  • If there are 48 boys and 36 girls in a room, fill out all of the possible ratios of boys to
    6·1 answer
  • Help please. will give brainliest. i think it is b or c.
    10·1 answer
  • Evauluate expression 14/3n - n​
    10·1 answer
  • 10x + 9y - 10z = -7<br> 72 - 9y + 72 = 0<br> 7x – 3y + 2z = 2
    7·1 answer
  • Simo scored 65 points in a game. Ella scored e points in the same game. If they scored a total of t points for the game, write a
    7·1 answer
  • 18 inches equals how many yards
    15·1 answer
  • Need answer asap! Which set of points would result in a slope of 1/4?
    12·1 answer
  • Aruseq<br><br> It’s supposed to be unscrambled to make a polygon
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!