The ratio of Roger's age to his son's age is 7:3. If the sum of their ages is 60, then how old is Roger's son? A. 17 years old
B. 18 years old
C. 19 years old
D. 20 years old
E. 21 years old

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $

What expression is equivalent to (2x-1)(x-3)?

Which expression gives the exact value of x?