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ivolga24 [154]
3 years ago
7

A professional cyclist is training for the Tour de France. What was his average speed in kilometers per hour if he rode the 194

kilometers from Laval to Blois in 4.2 hours?
Mathematics
1 answer:
Lisa [10]3 years ago
4 0
Start with the distance equation D=RT, then plug in numbers

194=R x 4.2, so all we have to do is divide 194 by 4.2. 

Answer: 46.19 kph 
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The medians of triangle XYZ intersect at Point P. If PY=12, what is VY?
AlekseyPX

Answer:

18

Step-by-step explanation:

PY = \frac{2}{3} YV

\frac{2}{3} YV = 12

VY = 18

3 0
3 years ago
Can anyone help me in Ptolemy's theorem?
GalinKa [24]

Answer:

Well, I'm not sure what you mean but Ptolemy's Theorem gives a relationship between the side lengths and the diagonals of a cyclic quadrilateral; it is the equality case of Ptolemy's Inequality. Ptolemy's Theorem frequently shows up as an intermediate step in problems involving inscribed figures.

8 0
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Can someone please help me with this ASAP!! (will mark as brainliest if correct)
sattari [20]

Answer:

P = 6x-2

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Step-by-step explanation:

To find the perimeter, we add the sides

P = 4x-8 + 3-2x + 5x+3

Combine like terms

P = 4x-3x+5x  -8+3+3

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Now we know the perimeter

82 = 6x-2

Add 2 to each side

82+2 = 6x-2+2

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Divide each side by 6

84/6 = 6x/6

14=x

6 0
4 years ago
Read 2 more answers
The total cost of producing a type of tractor is given by C(x)=11000−20x+0.02x2, where x is the number of tractors produced. How
marissa [1.9K]

Answer:

Step-by-step explanation:

You need to complete the square.

C(x) = 0.02(x^2 - 1000x  ...)  + 11000

C(x) = 0.02 (x^2 - 1000x + 500^2) + 11000 - 5000

C(x) = 0.02 (x^2 - 1000x + 500^2) + 6000

C(x) = 0.02(x - 500)^2 + 6000

Now if you look at the answer you will find that the square is completed. That means that number of tractors you could produce is 500 at a cost of 6000

There is a flow to this question that you may have trouble understanding.

First of all the 500^2. That comes from taking 1/2 of 1000 and squaring it. That's what you need to complete the square.

Bur that is not what you have adding into the equation. Remember that there is a 0.02 in front of the brackets.

500^2 = 250000

0.02 * 250000 = 5000

So that number must be subtracted to make the square = 0. When you remove the brackets, you should get 11000 all in all.

So what you have outside the brackets is 11000 - 5000 = 6000

The rest is just standard for completing the square.

5 0
2 years ago
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Answer:

A D F

Step-by-step explanation:

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