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IrinaK [193]
3 years ago
9

Points A, B and C are collinear. Point B is between A and C. Find x if AC=20, BC=x-19 and AB=x+17.

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
4 0

Answer:

11

Step-by-step explanation:

20-[(x-19)+(x+17)]

=20-2x+2

=22-2x

As AB+BC=AC, 22-2x=0.

Thus 2x=22

x=11

it should be right

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nlexa [21]
Hello : 
the ridus is : <span>√49 =7
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Jimmy owns a small engine repair business. The revenue, in dollars, can be modeled by the equation y = 420 + 72x, where x is the
Nataly [62]
I added a screenshot with the complete question.

Answer:
5 hours

Explanation:
We are given that:
Revenue equation:
y = 420 + 72x
Overhead equation:
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We are asked to get the break-even point which is calculated by equating the revenue to the overhead cost.

This can be done as follows:
revenue = overhead cost
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or: x+2=0 .......> x = -2 hours (rejected value as time cannot be negative)

Based on the above:
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Hope this helps :)

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4 years ago
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Answer:

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3 years ago
Given a right triangle whose side lengths are all integer multiples of 8, how many units are in the smallest possible perimeter
leonid [27]

Answer:

96 units.

Step-by-step explanation:

Let a, b represent legs and c represent hypotenuse of the given right triangle.

We are told that in the given triangle all side lengths are all integer multiples of 8. Using Pythagoras theorem, we can represent this information in an equation as:

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64a^2+64b^2=64c^2

Upon dividing both sides by by 64, we will get:

a^2+b^2=c^2

We know that smallest Pythagoras triplet is such that a=3, b=4\text{ and }c=5.

Since all sides are multiple of 8, so the smallest possible perimeter would be 8(3+4+5)=8*12=96.

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