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aivan3 [116]
2 years ago
8

Three Friends all have ages that are consecutive integers. The sum of their ages is 48. What is the age of the oldest friend?

Mathematics
2 answers:
zlopas [31]2 years ago
3 0
The oldest friend is 17 years old. 15+16+17. 5+6=11+7=18. 18+10+10+10= 48. get my level B) jk
Ksenya-84 [330]2 years ago
3 0
"The sum of their ages is 48" means x + (x + 1) + (x + 2) = 48 

<span>x + x + 1 + x + 2 = 48 </span>

<span>x + x + x + 1 + 2 = 48 </span>

<span>3x + 3 = 48 </span>

<span>3x = 48 - 3 </span>

<span>3x = 45 </span>

<span>x = 45/3 = 15 </span>

<span>So if the youngest is 15 (x = 15), then the oldest is x + 2 or 15 + 2 = 17</span>
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If sum of first 6 digits of AP is 36 and that of the first 16 terms is 255,then find the sum of first ten terms.
Cloud [144]

Answer:

100

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We have the sum of first n terms of an AP,

Sn = n/2 [2a+(n−1)d]

Given,

36= 6/2 [2a+(6−1)d]

12=2a+5d ---------(1)

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Substituting for d in (1),

12=2a+5(2)=2(a+5)

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∴ The sum of first 10 terms of an AP,

S10 = 10/2 [2(1)+(10−1)2]

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This is the sum of the first 10 terms.

Hope it will help.

4 0
2 years ago
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Which is equivalent to this expression?<br> 2/150 + 3/75
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Answer:

Step-by-step explanation:

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\frac{2}{150}=\frac{1}{75}\\\\\frac{2}{150}+\frac{3}{75}=\frac{1}{75}+\frac{3}{75}\\\\=\frac{1+3}{75}=\frac{4}{75}\\

7 0
3 years ago
when directed to solve a quadratic equation by completing the square, Sam arrived at the equation (x-(5/2))^2= (13/4). which equ
Tasya [4]
We have the following expression:
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 Answer:
 
the original equation given to Sam could have been:
 
x ^ 2 - 5x + 3 = 0
7 0
2 years ago
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