Answer:
225
Step-by-step explanation:
Using the basic components of summation ∑
∑n = 
n(n + 1) and ∑1 = n
Thus
∑ (2n - 1) ← for n = 1 to 15
= ∑2n - ∑1
= 2∑n - ∑1
= 2 ( n(n + 1)) - n
= n(n + 1) - n ← Evaluate for n = 15 ( the upper value )
= 15 × 16 - 15
= 240 - 15
= 225
2(c-3)=s
because you have to subtract 3 years from sherman's age first, so you need the parentheses
Answer:
6/25
Step-by-step explanation:
Answer:3 terms and a degree of 9
Step-by-step explanation:
Using the sum (addition) and two 2-digit addends, 12 + 34 can be answered without regrouping.
