Let the unknown number be x.
x × -7 = 7 (x + -40)
-7x = 7x - 280
-14x = -280
x = 280/14
x = 20
Hope this helps!
2, 6, 18, 54, 162, 486...
Start with the number 2.

And continue with that pattern from there.
Answer:
9.2
Step-by-step explanation:
Answer: width = 42, length = 74
Step-by-step explanation: 42 + 32 = 74
42 + 42 + 74 + 74 = 232