A rectangle has a perimeter of 30 inches. Its length is one less than three times its width. What is the width of the rectangle?

Perimeter of a rectangle can be represented by 2* length + 2 * width

We can represent the width with the variable x

We can represent the length by the expression 3x-1

So, now we can make a forumla and solve

2(3x-1) + 2(x) = 30

6x-2+2x = 30

8x = 32

x = 4 is the width of the rectange.

Now we find the length

3(4)-1

11 = Length

4

Step-by-step explanation:

The length is 3w-1. The perimeter isn't large enough for the width to be anything more than 10. I just used the number 4. 4 times 3 equals 12. 12 minus 1 equals 11. So to find the perimeter we have to add all the side lengths together. So 11 plus 11 equals 22. 4 plus 4 equals 8. 22 plus 8 equals 30. The answer is 4.

a mantle plume is an upwelling of abnormally hot rock within the earth's mantle. as the heads of mantle plumes can partly melt when they reach shallow depths, they are thought to be the cause of volcanic centers known as hotspots and probably also to have caused flood basalts.

step-by-step explanation: