Left page numbers are always even and right page will have a number 1 greater that the left. so its not possible to have a sum of 87.
If even page is 2n then right page = 2n + 1:-
2n + 2n + 1 = 87
4n = 86
n = 86 / 4 = 21.5 and 2n = 43 but left page is even so its not possible to have a sum of left + right = 87.
Answer:

Step-by-step explanation:

The point estimate is the mid-point of the interval:

The margin of error is the difference between the endpoints of the interval and the mid-point.
Start by putting into improper fractions.
- 1 2/3 = - 5/3
- 2 1/5 = - 11/5
Now stack the fractions like this.

Here's the key part (or one of them). Cancel the minus signs. Since there are 2 of them they become a plus.

Now invert the 11/5. That means turn it upside down. Put the 5 in the numerator and 11 in the denominator. Multiply by it by the top fraction.

When you do this, you just multiply top by top and bottom by bottom
Answer:
i am really not sure because i worked it out but i needed to see how they said it .
Step-by-step explanation: