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bezimeni [28]
3 years ago
13

Solve the proportion 3/x-1=5/7

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
3 0
x= \frac{4}{7}
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Find the sum of (1-1/n) + (1-2/n) + (1 - 3/n)....upto n terms
bija089 [108]

Answer:

<em> (n - 1)/2</em>

Step-by-step explanation:

F = (1 - 1/n) + (1 - 2/n) + (1 - 3/n) + ...(1 - n/n)

  = (1 + 1 ... + 1) - (1/n + 2/n + 3/n + ...n/n)

     (there are n terms of 1)

  = n - (1 + 2 + 3 + ... + n)/n

  = n - [n x (n + 1)/2]/n

  = n - [n x (n + 1)]/[2 x n]

  = n - (n+1)/2

  = (2n - n - 1)/2

  = (n - 1)/2

Hope this helps!

4 0
2 years ago
At Darren's Hats, there are 42 baseball caps and 14 other hats. what percentage of the hats are baseball caps?
emmainna [20.7K]

Answer:

Step-by-step explanation:

calculate the total

42+ 14 = 56

42/56 = x/100

4200 / 56x = 75

the answer is 75%

3 0
2 years ago
Which of the following expressions give the distance between the endpoints of the segment shown on the number line below? Select
Travka [436]
C)-35 -45 that would be the correct answer
7 0
2 years ago
Read 2 more answers
Please answer correctly !!!!!! Will mark brainliest Answer !!!!!!!!!!!
enyata [817]

Answer:

45 meters

Step-by-step explanation:

graph the equation and find the y-intercept

3 0
3 years ago
Complete the solution of the equation. Find the value of y when x equals -4. 5x + 2y = -20
guajiro [1.7K]
<span>5(-4) + 2y = -20
-20 + 2y = -20
2y = -20 + 20
2y = 0
y = 0</span>
6 0
3 years ago
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