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Can Someone Help Me With This In Within The Next 12 Minutes - Education - Nairaland

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Can Someone Help Me With This In Within The Next 12 Minutes by Nobody: 2:41am On Sep 29, 2020
Please

Re: Can Someone Help Me With This In Within The Next 12 Minutes by femi4: 7:50am On Sep 29, 2020
No 2. Using a+(n-1)d

3+(11-1)d = 43

3+ 10d = 43

10d = 40

d =4

2b. Sum of the first 20 terms without the even No's positions

3+11+19+27+35+43+51+59+67+75 =390



Alternatively
Using S = n/2 (a+l)
a = 3
New d = 8
New n =10
l = 3+(10-1)8
l = 3+72= 75

Hence S = 10/2 (3+75) = 5 * 78
= 390




No3
a. Fraction of the journey left after he got off the train = 1 - 3/5 = 2/5

b. Fraction of the journey by bus = 2/3 * 2/5 = 4/15

c. Distance walked = 1-(3/5 + 4/15) = 2/15

Ratio of dist by train to dist walked
3/5 : 2/15= 9/2

9:2
Re: Can Someone Help Me With This In Within The Next 12 Minutes by femi4: 8:42am On Sep 29, 2020
No 1

Re: Can Someone Help Me With This In Within The Next 12 Minutes by Freestainworld(m): 2:35pm On Sep 29, 2020
grin grin even the teacher that set the question can not solve it.
Re: Can Someone Help Me With This In Within The Next 12 Minutes by Nobody: 10:53am On Sep 30, 2020
femi4:
No 2. Using a+(n-1)d

3+(11-1)d = 43

3+ 10d = 43

10d = 40

d =4

2b. Sum of the first 20 terms without the even No's positions

3+11+19+27+35+43+51+59+67+75 =390



Alternatively
Using S = n/2 (a+l)
a = 3
New d = 8
New n =10
l = 3+(10-1)8
l = 3+72= 75

Hence S = 10/2 (3+75) = 5 * 78
= 390




No3
a. Fraction of the journey left after he got off the train = 1 - 3/5 = 2/5

b. Fraction of the journey by bus = 2/3 * 2/5 = 4/15

c. Distance walked = 1-(3/5 + 4/15) = 2/15

Ratio of dist by train to dist walked
3/5 : 2/15= 9/2

9:2

Special appreciation
Re: Can Someone Help Me With This In Within The Next 12 Minutes by femi4: 10:55am On Sep 30, 2020
mikezuruki:


Special appreciation
you're welcome

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