The answer is one because according to pemdas you must do the parentheses first then do the rest
Answer:
Standard form: 
Leading coefficient: 1
Step-by-step explanation:

The leading coefficient is 1 because the leading term is
.
I think this may be multiplication so 5 times 10 equls50
C is the answer hope this helps.
Answer:
48x-72
Step-by-step explanation:
u multiply 3 by 16x then multiply 3 by 24 and bring down your minus sign