Which of these algebraic expressions or equations represents the phrase,
"three times the product of p and q"?
A) pa
B) 3pg
C) 3+ pa
D) pq=3

B

Step-by-step explanation:

You are multiplying 3 times the product of p and q.  Product is the result of multiplication.  So 3 * p * q or 3pq

  see the attachment

Step-by-step explanation:

It helps to follow along the proof and consider how you get from here to there.

In the 5th line, we have a sum in symbols.

In the 7th line, we have an expression with a number on the right side, and a statement that says we got there by subtraction.

Then we expect line 6 to have a sum with numbers whose difference is 40°. (That eliminates the 3rd and 4th choices.)

The way you get from an expression with symbols to an expression with numbers is to make a substitution of numbers for symbols. Hence the appropriate choice is the one shown below.