An array has twice as many columns as rows. the dividend for a division sentence that describes the array is 18. how many rows and columns does the array have?

The array has 9 rows and 18 columns.

Step-by-step explanation:

Let the number of rows of the array = x

Then, the number of columns = 2x

The division sentence that describes this situation is:

Here, the dividend is 2x.

But, it is given that the dividend is 18.

So, 2x = 18 and

x = 9

Hence, the array has 9 rows and 18 columns.