Answer:
C) (7 , 14)
Step-by-step explanation:
Substitute each ordered pair into the equation
-5x + 3y = 7.
A) (2 , -1)
-5(2) +3(1) = -10 +3 = -7 this does not equal 7 so not true
B) (-5 , 3)
-5(-5) +3(3) = 25 +9 = 34 this does not equal 7 so not true
C) (7 , 14)
-5(7) + 3(14) = -35 + 42 = 7 this equals 7 so true
D) (-2 ,−135)
-5(-2) + 3(-135) =10+405 =415 this does not equal 7 so not true
Answer: 30.85%.
Step-by-step explanation:
Let X denotes the score of random student.
Given: 
and 
We assume that scores are normally distributed.
Then , the probability that a a student score higher than 55:
![P(X>55)=P(\dfrac{X-\mu}{\sigma}>\dfrac{55-50}{10})\\\\=P(Z>0.5) \ \ [Z=\dfrac{X-\mu}{\sigma}]\\\\=1-P(Z](https://tex.z-dn.net/?f=P%28X%3E55%29%3DP%28%5Cdfrac%7BX-%5Cmu%7D%7B%5Csigma%7D%3E%5Cdfrac%7B55-50%7D%7B10%7D%29%5C%5C%5C%5C%3DP%28Z%3E0.5%29%20%5C%20%5C%20%5BZ%3D%5Cdfrac%7BX-%5Cmu%7D%7B%5Csigma%7D%5D%5C%5C%5C%5C%3D1-P%28Z%3C0.5%29%5C%5C%5C%5C%3D1-0.6915%5C%20%5B%5Ctext%7BBy%20p-value%20table%20for%20z%7D%5D%5C%5C%5C%5C%3D%200.3085)
Hence, the percent of students have a higher score than hers is 30.85%.
The correct answer is C. 1.5
You can find this answer by using any of the points on the graph and putting them into the given equation. Then you can solve for the constant. For the purpose of this example, we will use (10, 15)
Height = Constant * Width ---> Plug in known values.
15 = Constant * 10 ----> Divide both sides by 10
1.5 = Constant
This will work with whatever numbers you use from the graph. Although this graph does not have any others to really choose from.
Answer:
What I think it is from 5 through 25 or something like that
0.2 0.3 1 3.2 9 skskskksks
