I have included a picture. In the picture you will find the work and final answer.
There are 25 grandparents there were in the survey. 4 prefered digital copies, 21 prefered hard copies.
4/25 prefered digital copies
21/25 prefered hard copies
21 is more than 4.
The only one of the possible answers that imply that more people prefered hard copies was the third option. Therefore, "More grandparents prefer using a hard copy than a digital copy." is the correct answer.
Answer:
-20 - 90v
Step-by-step explanation:
10(-2-9v) multiply each term in parentheses by 10
-10 × 2 - 10 × 9v multiply the numbers
-20 - 10 × 9v calculate the product
-20 - 90v is the answer
The answer is C 23. The problem says that "the mean number of days of the sample" is outside the confidence interval. The mean number of days of the sample is equal to 23. If 23 is outside the confidence interval, this is probably not the mean number of days that the company's air fresheners last.
Answer:
The numbers are 50 & -72.
Step-by-step explanation:
Let the first number is x and the second number is y.
According to the question:-
x + y = -22 ........(1)
x - y = 122 ........(2)
By adding equation 1 & 2-
2 x = 100
x = 50
Put X =50 in equation (1)-
y = -22 -50
y = -72
Hence the numbers are (50, -72).
