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gayaneshka [121]
3 years ago
15

Which of these is not a possible r-value?

Mathematics
1 answer:
Y_Kistochka [10]3 years ago
7 0

Answer:

a. 1.75

Step-by-step explanation:

r values, or the correlation coefficient  must be between -1 and 1, inclusive

-1 is a perfect negative correlation

0 is no correlation

+1 is a perfect positive correlation

1.75 is not between -1 and 1

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Ilya [14]

Answer:

The answer is D

Step-by-step explanation:

Plz brainlist

4 0
3 years ago
0.9(3÷2.25− 1/8 (1 2/3 1/9 ))− 4/7 ÷0.8. i would like to know what this equals if you could help that would be great.
mario62 [17]

Answer:

781/1680

Step-by-step explanation:

Don't you have a calculator?

I assume that by (1 2/3 1/9), you mean (1+2/3)*(1/9)

Assuming that you put all necessary parentheses:

781/1680, approx. 0.4648809523809524



7 0
4 years ago
Find sin(x/2), cos (x/2), and tan(x/2) from the given information.
zhannawk [14.2K]

Step-by-step explanation:

sin(x/2) = sqrt((1 - cos(x))/2)

cos(x/2) = sqrt((1 + cos(x))/2)

tan(x/2) = sin(x/2)/cos(x/2)

sin(x) = 15/17

so, we can assume the Hypotenuse of the right-angled triangle is 17, the vertical leg is 15.

via Pythagoras we get the 3rd, horizontal side :

17² = 15² + side²

289 = 225 + side²

64 = side²

side = 8

cos(x) = 8/17

sin(x/2) = sqrt((1 - 8/17)/2) = sqrt(9/34) = 3/sqrt(34) =

= 0.514495755...

cos(x/2) = sqrt((1 + 8/17)/2) = sqrt(25/34) = 5/sqrt(34) =

= 0.857492926...

tan(x/2) = 3/sqrt(34) / 5/sqrt(34) = 3/sqrt(34) × sqrt(34)/5 =

= 3/5 = 0.6

6 0
2 years ago
a student scored 78 and 95 on his first two quizzes. Use a compound inequality to find the possible values for a third quiz scor
kicyunya [14]
He gets an average between 80 and 90
 It is between these two values
 So it could be 80 or higher but it must be 90 or belowe so it can be equal to 80 or above and it can be equal to 90 or below
 This gives two inequalities 80 ≤ x and x ≤ 90
 This can be written as 1 inequality 80 ≤ x ≤ 90
 ≤ this means less than or equal to the one that points the opposite way would be greater than or equal to think of it as a number line pointing right is positive meaning the numbers get bigger, getting greater pointing left is getting smaller so it gets less and less 
5 0
3 years ago
Last night, the two dinner specials at Sanjay's favorite restaurant were salmon filet and steak. The restaurant served 70 specia
m_a_m_a [10]

Answer:

42

Step-by-step explanation:

60% is 3/5 of the total, and the total is 70. 70/5 is 14, and 14 x 3 is 42.

hope this helped!

8 0
3 years ago
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