Answer:
8n-1
Step-by-step explanation:
it would be 8n-1 because you combine like terms
Answer:
Step-by-step explanation:
a=2d+3
b=3d-12
c=a+b so
c=2d+3+3d-12
c=5d-9
Answer: x^2+12=x+4
Step-by-step explanation:
Answer:
180
Step-by-step explanation:
The 12 th square number is
12² = 12 × 12 = 144
The 6 th square number is
6² = 6 × 6 = 36
Thus
sum = 144 + 36 = 180
Answer:the middle one
B is the answer
Step-by-step explanation: