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Sonbull [250]
3 years ago
15

I WILL GIVE BRAINLIEST!!!

Mathematics
2 answers:
Nikitich [7]3 years ago
7 0

Let's see what to do buddy....

____________________________

Step (1)

Express taxi charges 2.50 $ per mile.

So if each mile equals x the taxi charges 2.50 x.

There's the starting fare too.

So ;

Express taxi charges by the following function :

f(x) = 2.5x + 10

____________________________

Step (2)

Speedy taxi charges 3 $ per mile.

So if each mile equals x the taxi charges 3x .

There's no starting fare.

So ;

Speedy taxi charges by the following function :

g(x) = 3x

____________________________

Step (3)

To find that after how many miles is the cost of both taxi services the same , we must equal their functions.

Then solve for x .

So we have :

f(x) = g(x)

2.5x + 10 = 3x

Subtract the sides of the equation minus 2.5x :

10 = 0.5x

10 =  \frac{1}{2}x \\

Multiply the sides of the equation by 2 :

x = 20

<em> So after 20 miles both taxi services have the same cost. </em>

____________________________

And we're done.

Thanks for watching buddy good luck.

♥️♥️♥️♥️♥️

MrMuchimi3 years ago
4 0

Answer:

Answer is after 20 miles

Step-by-step explanation:

10 +2.5x = 3x

10 = 3x-2.5x

10=0.5x

10/.5=x

x=20

At 20 miles they both have a cost of 60

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madam [21]
To solve this question, we should know the Triangle Inequality Theorem.

The triangle inequality theorem says something like: The sum of any two sides of a triangle must be greater than than the length of the third side

Making that into a formula, considering the side lengths are a, b, and c.
a + b > c
a + c > b
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So:
Lets test answer choice A.

The sides will then be: 34, 12, and 21

34 + 12 > 21 -> 46 > 12 True
12 + 21 > 34 -> 33 > 34 False

A is not the correct answer choice.

Lets try answer choice B.

The sides for this would be: 34, 12, and 30

34 + 12 > 30 -> 46 > 30 True
12 + 30 > 34 -> 42 > 34 True
30 + 12 > 34 -> 42 > 34 True

So B is correct.

Lets try C to make sure.

The side lengths would be: 34, 12, and 46

34 + 12 > 46 -> 46 > 46 False

So C is wrong.

Lets just make sure D is also wrong, and then we will know for sure if B is the answer :)

Side lengths of answer choice D: 34, 12, and 50

34 + 12 > 50 -> 46 > 50 False

So B is indeed our answer. :)

Another way to solve it is to:

We are given side lengths of 34 and 12.

That means the other side has to be greater than the different of 34 and 12 and less than the sum of 34 and 12.

Lets say that c is the third side, then:

34 -12 < c < 34 + 12
22 < c < 46

And by looking at this range, and the answer choices we know that B) 30 is the answer because the others are at the border and since it isn't greater than or equal to/less than or equal to, we can not include it.Or either the answer choices are out of the range.

So the final answer is \boxed{\bf{B)~30~cm}}
4 0
3 years ago
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