It's dependent on the context. A book may ask you to find the f'(x) of a function and you may have to use a u sub in your problem which requires you to find the dy/dx of what you substitute. So in this case both would be used.
Answer:
B
Step-by-step explanation:
y = 5x
check your work by plugging in the values
y = 5(1)
y = 5 yes
y = 5(2)
y = 10 yes
y = 5(3)
y = 15 yes
y = 5(4)
y = 20 yes
We need to multiply 4/5 by 4 5/8. We change 4 5/8 into a fraction to do the multiplication.
4/5 * 4 5/8 =
= 4/5 * 37/8
= 148/40
= 37/10
= 3 7/10
Answer: Sara's sister is 3 7/10 ft tall.
Answer:
I'm so sorry if I'm wrong but in my opinion I think the answer is C you don't have to choose it
