7x - 1 + 6x - 1 = 180
13x - 2 = 180
13x = 182
x = 14
Alright! So to solve these questions, you need to find out the difference. You can use ratios to solve this. For example, question #25:
A class had 30 pupils at the beginning of this school term, but now has 5 more pupils. What is the percent of increase?
The question is basically asking how much 5 is in ratio to 30. So just divide 5 (the given amount) by 30 (the total amount). The answer is 0.16, or 16%
3/7≈0.429
I hope it will help you
Answer:
in my opinion is the last:
this studies uses a control group
Step-by-step explanation:
Answer:
2000
Step-by-step explanation:
100 x 120 = 12000
12000 divided by 6 = 2000
