Answer:
20
Step-by-step explanation:
The average term in the series is the average of the first and last terms:
average term = (25 +101)/2 = 126/2 = 63
The sum of the series is the product of the average term and the number of terms:
Sn = n(average term)
1260 = 63n
1260/63 = n = 20
The number of terms in the series is 20.
1. 3 9/20
2. 1.86
3. 3 63/80 < 3 11/20< 3 1/5
4 1/3 , .35, 2/5
5.2(5x+1)
6. 5f+4s
7. Yes it does because the number of steps the runner will take is 46,145. There is no decimal.
8. She sold more on Tuesday because the decimal 7/9= .777 repeating which is smaller than.85.
9. Yes it is in simplest form
10. No it is not
11. 12 more days
Option B is your answer.
3/5x - 5 + 5/5x - 4 = - 1
8/5x - 9 = - 1
8/5x = - 1+ 9
8/5x = 8
Multiply both sides by 5/8 (the reciprocal of the coefficient) to isolate variable X.
(5/8)(8/5x) = 8(5/8)
x = 40/8
x = 5