A postcard has a perimeter of 22 inches and an area of 30 square inches, What are the
dimensions of the postcard?

Since a postcard is a rectangle, there are going to be two sides of equal length and two other sides of equal length. Knowing that the area is 30 inches, area= length x width, that means that you can find factors of 30. For example, if you were to try 5 and 6 as the length and width, you would add 5+5+6+6. Which is 22. The length of the postcard is 6 inches and the height is 5 inches. 5x6.

5 by 6

Step-by-step explanation:

Set one side as x and set the other as y. We have 2x+2y=22, and x*y=30. We can isolate x in the first equation as x=11-y, then plug it into the second equation so we now have (11-y)*y=30. So, we can pull out y=5,6. Plugging that into the first equation, we have x=6,5. So, the dimensions are 5 by 6.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.