Answer:
Which of the following is a common sign that a chemical change has occurred?
Step-by-step explanation:
Answer:
No
Step-by-step explanation:
The amounts of change are the same, but the original amounts are different. The ratio for the percent increase from 50 to 70 is 20/50, or 40%. The ratio for the percent decrease from 70 to 50 is 20/70, or about 29%.
Answer:
6b
Step-by-step explanation:
|-b| = b
b+5b= 6b
Answer:
9
Step-by-step explanation:
52=100%
x=30%
52/x=100%/30%
which equals to 15.6
Answer 15.6