Answer:
8 children
This is because if he has one son, then every daughter has one brother. Therefore, if he has four sons, each of his daughters have four brothers.
First multiply 11 with 9 to get 99 and then 11 with d to get 11d
thus the answer is 99+11d.
Answer:
<u>x = 8</u>
Step-by-step explanation:
The sides are in proportion.
- 40 / 7x + 14 = 44 / 33 + 44
- 40 / 7x + 14 = 44/77 = 4/7
- 40(7) = 4(7x + 14)
- 280 = 28x + 56
- 10 = x + 2
- <u>x = 8</u>
Answer:
21
Step-by-step explanation:
6000lbs x 7 days = 42000lbs
42000lbs / 2000lbs = 21 tons
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.
