Answer:
The answer is 40.
Step-by-step explanation:
If you do 40 x 5 the answer you get is 200. Which from there you can do 40 x 7 and get 280 which 280 - 200 is 80. Thus meaning the number would be 40. Hope this helps!
Answer; length = 14 width = 10
cos O = adjacent / hypotenuse
cos O = 12/13
I hope I helped you^_^
I think it is 70
7(10)=70
70=70