Answer:
A, B, C, D
Step-by-step explanation:
A is equal to 54, B is equal to 23, C is equal to 72, and D is equal to 84.
Answer:
The statement 
is a tautology.
Step-by-step explanation:
We have the following statement
A truth table shows how the truth or falsity of a compound statement depends on the truth or falsity of the simple statements from which it's constructed.
The simple statements from the statement given are:
, 
, 
, 
, and 
with these you can construct the following truth table.
A tautology is a formula that is always true, it is true for every assignment of truth values to its simple components.
The last column contains only true values. Therefore, the statement is a tautology.
1/21 * 1/20 = 1/420 that is the probability that you are chosen first.
Probability of your friend chosen first = 1/420 also.
So the required probability = 1/420 + 1/420 = 1/210 Answer
Its D
First remember that sum means to add. now think about the equation. we need to find 3 numbers that equal 159 when added together. And they are all consecutive odd numbers. so let's call the first number X. the second number would be X+2 since we have to jump over 1 even number. The third number would be X+4 since we have to jump over 2 even numbers. so now an equation to represent this would be X+(X+2)+(X+4)=159. Add like terms, and remember order of operations. if you need help getting the answers leave me a comment.
Answer:
c
Step-by-step explanation:
