Solve the following questions using the integer rules of addition and subtraction. I WILL GIVE BRAINLEST
9.
26 + - 14
14.
11 - 7 =
10.
21 - (-12) =
15.
-19+
= -23
I
11.
- 12 + 34 =
16.
- 23 = 10
12.
-23 + -21 =
17.
-12 + 34 - 20 =
13.
.
20 - 41 =
18.
13 + - 22 - (- 4) =

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

Ahighway between points a and b has been closed for repairs. an alternative route between there two locations is to travel between a and c and then from c to b what is the value of y and what is the total distance from a to c to b?

87.5% , 100% , 83.33 , 93.33% , 100% , 82.5% are all the academic points i've gotten this quarter. what's my final grade?