Answer:
is it 82 degrees?
Step-by-step explanation:
I think it is the first one -2
Answer:
∴ ∑₁⁸i = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8
Step-by-step explanation:
Given:
To Find:
∑₁⁸i =?
Solution:
Σ This symbol called Sigma means "summation up"
∴ ∑ n mean sum for all n
But if ∑₁³n means Sum for n=1 , 2 ,and 3 ADD
∴ ∑₁³n = 1 + 2 + 3
∴ ∑₁⁸i = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8
Answer:
7 rows
Step-by-step explanation:
total 42 tiles. 6 columns mean, each column will have 6 tiles. so to have 42 tiles, 6*7 required
