Let:
x = Chemistry textbooks sold
y = Physics textbooks sold
The textbook store sold a combined total of 260, so:

The number of chemistry books sold was three times the number of physics textbooks sold, so:

Let:

Replace (2) into (1):

Replace the value of y into (2):
Answer:
f(x)= x^3
Step-by-step explanation:
Answer:
-24
Step-by-step explanation:
3 * -4 =.-12
-12 * 2 = -24
3 times. Draw a line 1 unit up, and you can see that there are 3 intersections.