I dont really understood what u hav written in the last part...so i guessed it...hope its right
Answer:
A and D
Step-by-step explanation:
Answer:
3x- we need to know what x is to go any further
Step-by-step explanation:
Answer:
The number b is bigger than the number a by
of a.
Step-by-step explanation:
1. If the number a is smaller than the number b by 1/5 of b, then
![a+\dfrac{1}{5}b=b.](https://tex.z-dn.net/?f=a%2B%5Cdfrac%7B1%7D%7B5%7Db%3Db.)
Thus,
![a=b-\dfrac{1}{5}b=\dfrac{4}{5}b,\\ \\b=\dfrac{5}{4}a.](https://tex.z-dn.net/?f=a%3Db-%5Cdfrac%7B1%7D%7B5%7Db%3D%5Cdfrac%7B4%7D%7B5%7Db%2C%5C%5C%20%5C%5Cb%3D%5Cdfrac%7B5%7D%7B4%7Da.)
2. Consider the expression ![b=\dfrac{5}{4}a:](https://tex.z-dn.net/?f=b%3D%5Cdfrac%7B5%7D%7B4%7Da%3A)
![b=\dfrac{5}{4}a=\dfrac{4}{4}a+\dfrac{1}{4}a=a+\dfrac{1}{4}a.](https://tex.z-dn.net/?f=b%3D%5Cdfrac%7B5%7D%7B4%7Da%3D%5Cdfrac%7B4%7D%7B4%7Da%2B%5Cdfrac%7B1%7D%7B4%7Da%3Da%2B%5Cdfrac%7B1%7D%7B4%7Da.)
This gives you that the number b is bigger than the number a by
of a.