Answer: 9+4n-1 = 20
We can solve this by substitution.
Replace n with the value given, 3 (remember 4n means 4 times n):
9 + 4*3 - 1
Then work it out using arithmetic
9+12-1
=20
Answer:
its area is square (11+17+4)
I guess this may help you
Answer:
I cant see the full picture of the bottom triangle
Step-by-step explanation:
The nth term is 9n-3. The 10th term is 87 and the 75th term is 642.
1057.5 should be your answer
