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Lelu [443]
2 years ago
7

I WILL GIVE BRAINIEST

Mathematics
2 answers:
a_sh-v [17]2 years ago
7 0
Expand the bracket firsr by multiplying everything in the bracket by - 5 and you now have 3-10x-5<10, which simplifies to -2-10x<10
Bring - 2 over to the other side by adding 2 on both sides and now you have -10x<12. Now simply divide both sides by -10 to isolate x and you get x<-1.2, or x<-6/5 as a fraction
yaroslaw [1]2 years ago
3 0
3 - 5(2x + 1) ≤ 10
3 - 10x - 5 ≤ 10
-10x - 2 ≤ 10
       +2    +2
___________
   -10x ≤ 12
Divide -10 on both sides.
x ≤ 12/-10
 x ≤ -1.2
-1.2 into a fraction is -6/5.
x ≤ -1.2 or x ≤ -6/5


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Suppose John is a high school statistics teacher who believes that watching many hours of TV leads to lower test scores. Immedia
Hatshy [7]

This question is incomplete, the complete question is;

Suppose John is a high school statistics teacher who believes that watching many hours of TV leads to lower test scores. Immediately after giving the most recent test, he surveyed each of the 24 students in his class and asked them how many hours of TV they watched that week. He then matched each student's test grade with his or her survey response. After compiling the data, he used hours of TV watched to predict each student's test score. He found the least-squares regression line to be y"  = -1.5x + 85.

He also calculated that the value of r, the correlation, was -0.61.

what is the correct value of the coefficient of determination R² and give a correct interpretation of its meaning

Answer:

Interpretation of coefficient of determination R² = 0.3721

R² = 0.3721, meaning 37.21% of the total variation in test scores can be explained by the least square regression line

Step-by-step explanation:  

Given the data in the question;

the least square regression line is;

y"  = -1.5x + 85

the correlation coefficient r = -0.61

Now, the coefficient of determination R² is square of correlation coefficient r

R² = -61²

R² = 0.3721

8 0
3 years ago
How are coordinate planes the same ???? <br> 22 points if u can answer
Natalka [10]

Answer: Its a trick question

Step-by-step explanation:

I did this yesterday

3 0
3 years ago
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Find the value of the lesser root of x2 - 8x + 7 = 0.
Andre45 [30]

Answer:

B) 1.

Step-by-step explanation:

x^2 - 8x + 7 = 0

(x - 1)(x - 7) = 0

x= 1, 7.

5 0
3 years ago
Read 2 more answers
I'm not sure if this is right or not could someone also explain why ?
nikitadnepr [17]
The mapping rule for 90 degrees counterclockwise would be (-y,x). So if you had (x,y) it would transfer to (-y,x). Yours is wrong it should be (4,-3). Remember
-(-4) is 4 and -3 stays as -3.

Basically, memorize these mapping rules.

Hope this helped!
6 0
3 years ago
Ari’s teacher says he may have his report grade based on either the mean or the median of his last six test scores.
stepan [7]
To find the mean you: <span>add up all the numbers, then divide by how many numbers there are.  So the mean for these numbers would be: 84%

To find the median: You put the numbers in order (From least to greatest), and then find the number exactly in the middle. Here it is an even amount of numbers. No problem, just add the two numbers in the middle and then divide by 2. The answer here is: 84%

</span>
6 0
3 years ago
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