Answer:
15
Step-by-step explanation:
a^2 + b^2 = c^2
9^2 + 12^2 = 225

Hope this helps!!
Answer:
If you multiply the length and width it's already more than D and b so it's between 41 and 71 , I believe it's 71 though
Answer: I believe it is D..
Answer:
23/16
Step-by-step explanation:
3*8/2*8=24/16-1/16=23/16
First term is -7, so a_1 = -7
To get the next term, we add on 4. We can see this if we subtract like so
d = (2nd term) - (1st term) = (-3) - (-7) = -3+7 = 4
So d = 4 is the common difference.
Apply a_1 = -7 and d = 4 to get...
a_n = a_1 + d*(n-1)
a_n = -7 + 4*(n-1)
a_n = -7 + (n-1)*4
Answer: Choice A