The ratio of their perimeters is still 7:20. The poster is a rectangle shape. If the length of each side of a poster is proportional to the other by a certain ratio, the sum of the lengths of all sides is also proportional by the same ratio. You can suppose the lengths of four sides of poster A are 7a, 7b, 7c, 7d, so poster B has 20a, 20b, 20c, 20d. (7a+7b+7c+7d)/(20a+20b+20c+20d)=7(a+b+c+d)/20(a+b+c+d)=7/20.
Answer: -3x + 8 should be your answer! A good way to get quick answers for questions like these would be https://www.cymath.com/answer.php which I just used to answer this question, hope it helps!
|x-4|=1
|x-4|-1=0 absolute values have 2 equations in them
x+4-1=0, x=3
x-4-1=0, x=5
A is the answer to the question
Hope it helps
Answer:7.15
Step-by-step explanation: You multiply it