It gets you closer to your answer.
Ex: 11×2-- Round 11 to 10 and then multiply and get 20. But if you get some answer like 50, you know it is wrong. But the answer is 23
Answer:
20 feet
Step-by-step explanation:
The scale is 3 inches is to 2 feet
As a ratio, it would be:

The question is what is the actual length of the stage if the drawing is 30 inches. All we need to do is find a ratio proportional to the scale ratio:

Now to find the missing number, cross multiply the fractions first:



Then solve for x:



The answer is 20 feet
Answer:
11
Step-by-step explanation:
Answer:
X=+30 that's all I know, Sorry I couldn't help much :(
Answer: 2916
Step-by-step explanation: hope it helps