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3 years ago

What is 8 divided by 8179

Mathematics

2 answers:

Yanka [14]3 years ago

6 0

Answer:

Step-by-step explanation:

1022

vodka [1.7K]3 years ago

5 0

Answer:

Step-by-step explanation:

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3 years ago

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Which set of points represents equivalent ratios and would follow the same pattern on a graph?

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(2,4), (4,8), (3,6), (5,10) because they’re all ratios of 1:2

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3 years ago

Rocco is doing an internship with a local carpenter. He is making $11.50 per hour.

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3 years ago

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3 years ago

The isosceles triangle below has height AQ of length 3 and base BC of length 2. A point P may be placed anywhere along the line

eduard

The question is missing parts. Here is the complete question.

The isosceles triangle below has height AQ of length 3 and base BC of length 2. A point P may be placed anywhere along the line segment AQ.

What is the minimum value of the sum of the lengths of AP, BP and CP?

Answer: The sum is 4.73.

Step-by-step explanation: Height of a triangle is a perpendicualr line linking a vertex and its opposite side.

Because triangle ABC is isosceles, point Q divides the base in 2 equal parts:

BQ = CQ = 1

Suppose QP = x

To calculate minimum value of the sum:

AP = AQ - QP

AP = 3 - x

Since triangles BQP and CQP are congruent and right triangles, use Pythagorean Theorem to figure out the value of BP and CP:

BP = CP = $\sqrt{BQ^{2}+PQ^{2}}$

BP = $\sqrt{1+x^{2}}$

Then, sum of AP, BP and CP is

$f(x)=3-x+2\sqrt{1+x^{2}}$

The minimum value is calculated using first derivative:

$f'=-1+\frac{2x}{\sqrt{x^{2}+1} }$

The value of x is limited: it can assume value of 0, when P=A and x=3, when P=Q. So, interval is [0,3].

x has value:

$-1+\frac{2x}{\sqrt{x^{2}+1} }=0$

$2x=\sqrt{x^{2}+1}$

$4x^{2}-x^{2}-1=0$

$3x^{2}=1$

x = ± $\frac{1}{\sqrt{3} }$

x can't assume negative value because is not in the interval:

x = $\frac{1}{\sqrt{3} }$

To find the minimum value of the sum, substitute x in the function above:

f( $\frac{1}{\sqrt{3} }$ )= $3-\frac{1}{\sqrt{3} } +2\sqrt{1+(\frac{1}{\sqrt{3} })^{2} }$

$f(\frac{1}{\sqrt{3}} )=3-\frac{1}{\sqrt{3}}+2(\sqrt{\frac{4}{3} } )$

$f(\frac{1}{\sqrt{3}} )=3-\frac{1}{\sqrt{3}} +\frac{4}{\sqrt{3}}$

$f(\frac{1}{\sqrt{3}} )=3+\frac{3}{\sqrt{3} }$

$f(\frac{1}{\sqrt{3}} )=4.73$

The minimum value of the sum of AP, BP and CP is 4.73.

7 0

3 years ago