Answer:
B. 7,600
Step-by-step explanation:
To find the sum of the first 50 terms of the arithmetic sequence 5,11,17,23,29, ..., we shall use the formula that is in the picture.
Sₙ = n/2 × [2a₁ + (n-1)d]
Sₙ = 50/2 × [2(5) + (50-1)6]
Sₙ = 25 × (10 + 294)
Sₙ = 25 × 304
Sₙ = 7600
Hope this helps.
