Answer:
The first choice
Step-by-step explanation:
Part A would be the second option, as well as part B
Answer:
Step-by-step explanation:
<h3>Given AP </h3>
<h3>To find</h3>
<h3>Solution</h3>
- a₁₂ = a + 11d = 62
- a₂₀ = a + 19d = 102
<u>Subtract the first equation from the second one:</u>
<u>Find a:</u>
- a + 11*5 = 62
- a = 62 - 55
- a = 7
<u>Find the sum of the first 20 terms:</u>
- S₂₀ = 1/2*20(a + a₂₀) = 10(7 + 102) = 10(109)= 1090
Answer:
570 feet above seal level
Step-by-step explanation:
The hiker was at 450 ft above sea level. He ascended 120 feet toward the top of the mountain (or goes up). 450+120 = 570. Therefore his new position is 570 feet above sea level!
Answer:
6704
Step-by-step explanation:
34206-27502=x