The answer C) One set shares some element with another.
If the problem is 3(15x - 17), none of those expressions are correct. You would multiple the 3 to each term (hence the "distributive" part) to get 45x - 51.
The y-intercept is the point where the graph crosses the y-axis. It is found by setting x=0. For your equation, that makes the x-term vanish and only the constant remains. The ordered pair is ...
(x, y) = (0, -9)
Answer: $4.55
Step-by-step explanation: 7% is equal to 0.07 so you can multiply the price of the book by 0.07 to get the sales tax in dollars, $4.55.
Cost= 2+0.25T is the equation because 2 dollars is the base amount and then you add the cost of the toppings (T)