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1 answer:
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Answer:
- 494
Step-by-step explanation:
Breaking down the summation into it;s component parts
= 4k - k(k + 1) ← substitute k = 19
= (4 × 19 ) - 1.5 × (19 × 20)
= 76 - (1.5 × 380)
= 76 - 570
= 494
Answer:
Step-by-step explanation:
Given
Required
Determine the true statement
<em>Options are not given; but, the question can still be attempted.</em>
<em></em><em></em>
<em></em>
Collect Like Terms
Divide through by 7
<em></em><em> -- This is true</em>
