Which number is missing from the diamond?

the number is 3.

Have a great day!!

Brainliest??<3

3 is missing from the diamond.

Step-by-step explanation:

The pattern shown is that the bottom three numbers, when added together, equal the top number. 4+4+2 =10. 7+2+3=12. 2+8+5=15. 3+2+?=8. So, 3+2=5 and 8-5=3. The missing number is 3.

Since x is the length, then x+7 has to be the width.
The area of a rectangle can be found via the formula :
A = length * width
So if we replace the area with the given number (170) and the length, and width, with what we assumed, we get..
170 = x * (x+7)
[which is.. ]
170 = x^2 +7x
0 = x^2 +7x - 170

And that is the answer.