3 years ago

I NEED HELP REALLY FAST!!!

Mathematics

1 answer:

nadya68 [22]3 years ago

3 0

Explain the question?

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HELPPPP,Which of the following choices is the length of AB if A (-3, -2) and B (5, -4)? AB = 2 AB = 68 AB = 4 None of these choi

Alexxandr [17]

<h3>Answer: $\sqrt{68}$ units is the exact length of AB</h3>

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Explanation:

Use the distance formula to get this answer. The idea is you subtract the x coordinates together, and do the same for the y coordinates as well. Square each result and add up those squares. The last step of the formula is to apply the square root to get the distance from A to B, which is also the length of segment AB.

$d = \sqrt{(x_1-x_2)^2+(y_1-y_2)^2}\\\\d = \sqrt{(-3-5)^2+(-2-(-4))^2}\\\\d = \sqrt{(-3-5)^2+(-2+4)^2}\\\\d = \sqrt{(-8)^2+(2)^2}\\\\d = \sqrt{64+4}\\\\d = \sqrt{68}\\\\$

Therefore, $AB = \sqrt{68}$

5 0

3 years ago

The cost of renting a canoe to use on the Humuya River is $31. The cost of renting a canoe to use on the Comayagua River is $5 p

ICE Princess25 [194]

Answer:

see the attachment

7 hours

Step-by-step explanation:

The cost for River Y is a constant (not dependent upon hours), so is c = 41.

The cost for River Z is the sum of the deposit and the hourly cost, so is ...

c = 13+4n

These equations and their graphs are shown in the attachment. The graphs cross where n=7, indicating you have to rent a canoe for 7 hours for the cost to be the same on both rivers.