24/ 12=2 because -3 times -8 is positive 24 divided by 5+7 which is 12 and 12 goes into 24 twice
For the writing assignment, the number of ways of choosing from two essay topics three different mandatory lengths is given by:

Thus, he has 20 choices to make for the writing assignment.
For the reading assignment, the number of ways of choosing from <span>five biographies and three volumes of essays</span> is given by:
5 x 3 = 15
Therefore, the total number of choices is given by 6 + 15 = 21 choices.
I'm sorry can you type it out? I can't see it very well
The probability that the value selected at random is greater than 30 will be found as follows:
z-score is given by:
z=(x-mu)/sig
z=(30-30)/2=0
thus
P(x>30)=1-P(X<30)=1-P(z<0)=1-0.5=0.5
Answer P(x>30)=0.5