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Anna11 [10]
3 years ago
14

Help me ASAP PLEASE thanks Please show work Random answers will be moderated

Mathematics
1 answer:
Readme [11.4K]3 years ago
4 0
He's wrong. Both equations refer to the same line, that's why he saw only one line. The solution to the system is the set of real numbers.
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Pls answer asappppp help me
Luden [163]

Answer: 19

Step-by-step explanation:

5 0
3 years ago
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The lengths of a trapezoid are represented by 2x + 3 , 4x - 5, 3x + 2, and 5x - 9. What is the perimeter of the trapezoid expres
tester [92]

Answer: 120x4+270

Step-by-step explanatio:

Umm so I’m only in 8th grade and this was on my test so the 4 is an exponent

3 0
3 years ago
Select the most likely answer for the coefficient of linear correlation for the following two variables: x = the number of hours
tiny-mole [99]

Answer:

Option b) r = 0.70      

Step-by-step explanation:

We are given the following in he question:

Variables:

x = the number of hours spent studying for a test

y = the number of points earned on the test

  • Correlation is a technique that help us to find or define a relationship between two variables.  
  • A positive correlation means that an increase in one quantity leads to an increase in another quantity
  • A negative correlation means with increase in one quantity the other quantity decreases.
  • +1 tells about a a perfect positive linear relationship and −1 indicates a perfect negative linear relationship.
  • Values between 0 and 0.3 tells about a weak positive linear relationship, values between 0.3 and 0.7 shows a moderate positive correlation and a correlation of 0.7 and 1.0 states a strong positive linear relationship.
  • Values between 0 and -0.3 tells about a weak negative linear relationship, values between -0.3 and -0.7 shows a moderate negative correlation and a correlation value of of -0.7 and -1.0 states a strong negative linear relationship.

As the number of hours increases, the number of points earned on the test increases. Thus, the two variables are positively correlated.

Thus, the coefficient correlation between two variables can be given by r = 0.70, that shows a moderate positive correlation.

Option b) r = 0.70

8 0
3 years ago
I NEED HELP PLZ I WILL GIVE THANKS AND BRAINLIST
alexira [117]
The mapping is not a function
6 0
3 years ago
Read 2 more answers
Identify the percent change <br><br> 28 seconds to 23 seconds
Zarrin [17]
Percent change=change/original times 100
chane=28-23=5
oriiginal=28

percent change=5/28 times 100
0.178 times 100
17.8

about 18% change
4 0
3 years ago
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