Answer:
-1
Step-by-step explanation:
Answer:
B. -y = -x
Step-by-step explanation:
When the values on both sides of the equal sign are changed, it becomes a negative number.
Answer:
We must add 400 ml of water.
Step-by-step explanation:
We can use the following equation:

Where:
- C(i) is the initial concentration of the solution (80%)
- C(f) is the final concentration of the solution (30%)
- V(i) is the initial volume (150 ml)
- V(f) is the final volume
Now, we just need to solve the equation for V(f).



Therefore, we must add 400 ml of water.
I hope it helps you!
Answer:
52.5
Step-by-step explanation:
Answer:
The answer is 7/8
Step-by-step explanation:
3/4 is the same as 6/8 so 6/8 plus 1/8 equals 7/8.