Multiply to negative 60 add to negative 11
Answer:
5
Step-by-step explanation:
To obtain the total score for all the 20 students, we multiply the average score by the number hence
Total score for all 20 is 81*20=1620
Similarly, for the 19 students, the sum of their total score equals the product of the average and number of students hence
Total score for 19 readable is 19*85=1615
The difference between these two total scores ie for 20 and 19 students equals to the value of unreadable score. Therefore,
Difference=1620-1615=5
Therefore, the value of unreadable score is 5
Answer:
P=20%
Step-by-step explanation:
Let's suppose that each question in the test has one and only one correct answer. This means we have 1 desired outcome out of the total 5 desired outcomes. Therefore:
Probability=#of desired outcomes / #of possible outcomes
or
![P=\frac{1 correct}{5 opctions}](https://tex.z-dn.net/?f=P%3D%5Cfrac%7B1%20correct%7D%7B5%20opctions%7D)
![P=\frac{1}{5}](https://tex.z-dn.net/?f=P%3D%5Cfrac%7B1%7D%7B5%7D)
P=0.20
P=20%
The answer is D f(x)=2(4^x)+3