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TEA [102]
3 years ago
10

Find the missing length

Mathematics
1 answer:
iren [92.7K]3 years ago
6 0
B^2 = c^2 - a^2
b^2 = 20^2 - 13^2
b^2 = 400 - 169
b^2 = 231
b= square root 231
b = 15.2
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29.
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Answer:

Sum of their present ages  = 20 years

Step-by-step explanation:

Present age :

   Neha's age = x years

Reemas' age = x - 4

After 5 years:

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Sum of the ages of Reema and Neha will be 30

Therefore,    

x + 5  + x + 1 = 30

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3 years ago
Find an equation of a line passing through the point (8,9) and parallel to the line joining the points (2,7) and (1,5).
TiliK225 [7]

Answer:

2x - y - 7 = 0

Step-by-step explanation:

Since the slope of parallel line are same.

So, we can easily use formula,

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and m is a slope of line passing through (x₁, y₁).

and since the slope of parallel lines are same, so here we use slope of parallel line for calculation.

and, Slope = m = \dfrac{y_{b}-y_{a}}{x_{b}-x_{a}}

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3 0
3 years ago
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Answer:

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Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Speed of lightning = 186,000 miles per second

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3 years ago
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