Answer:
F
Step-by-step explanation:
Hope this helps
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):
I believe it is commutative property cause the numbers didn't change instead they just switched places in the equation.
Answer:
wdym by "I need a hero for my exam"
do u want someone to solve all the problems for you?