3 years ago

What’s the mad of 0, 3, 6, 9, 11, 13, 14

Mathematics

1 answer:

RSB [31]3 years ago

7 0

ANSWER: 42/7 Hope this helped have a good day!

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A boy yells in a narrow valley. the sound reflects off of a boulder that is 80 m away. how long will it take to hear the echo if

Angelina_Jolie [31]

Answer:

0.50 seconds

Step-by-step explanation:

The time it takes for an echo to return is the time it takes for the sound to make the round trip between the source and the reflecting object.

The boulder is 80 m away from the source, so the round-trip distance is 2×80 m = 160 m. At a speed of 320 m/s, it takes sound ...

(160 m)/(320 m/s) = 0.50 s

to make the round-trip.

It will take 0.50 seconds to hear the echo.

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3 years ago

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NEED HELP! <br> WILL MARK BRAINLIEST FOR IF ANSWERED ALL!

dexar [7]

1. X less than of equal to (<_) -10

2. 2y > -5/2

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3 years ago

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Given an equilateral triangle with two vertices located at (-8, -5) and (3, 7), what is its perimeter?

Oduvanchick [21]

An equilateral triangle has 3 sides of equal length
find the length of 1 side and that is the length of te other 2 sides
so find the length and times 3

we need to find the distance betwen the points (-8,-5) and (3,7)

distance between the points (x1,y1) and (x2,y2) is
$D=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$
so
distance between (-8,-5) and (3,7) is
$D=\sqrt{(-8-3)^2+(-5-7)^2}$
$D=\sqrt{(-11)^2+(-12)^2}$
$D=\sqrt{121+144}$
$D=\sqrt{265}$

the distance is √265
the perimiter is 3√265 units

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3 years ago

What is the answer to −9x−2 when x=−4.

Agata [3.3K]

Answer:

-72

Step-by-step explanation:

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Which of the following expressions represents the phrase "19 less than a number"?

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