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Westkost [7]
3 years ago
9

Solve the system of equations. Write you answer as an ordered pair.

Mathematics
1 answer:
guapka [62]3 years ago
6 0

Answer:

Step-by-step explanation:

x - 3y = -13

x = -13 + 3y

3 * (-13 + 3y) + 7y = 25

-39 + 9y + 7y = 25

16y = 64

y = 4

3x + 7 * 4 = 25

3x = -3

x = -1

Answer: (-1, 4)

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How many seconds will it take an echo to reach your ears if you yell toward a mountain
DiKsa [7]

It will take 0.556 seconds for an echo to reach one's ears

<h3>Calculating the time to hear an echo</h3>

From the question, we are to determine how long it would take an echo to reach one's ears

From the formula,

Speed = \frac{2 \times distance \ travelled\ by \ sound}{Time}

NOTE: To hear an echo, the sound will travel to and fro, hence, it will cover twice the distance

From the given information,

Distance = 92.0 m

NOTE: Speed of sound in air at 0 °C ≅ 331 m/s

Putting the parameters into the formula, we get

331 = \frac{2 \times 92.0}{Time}

Time = \frac{2 \times 92.0}{331}

Time = 0.556 secs

Hence, it will take 0.556 seconds for an echo to reach one's ears.

Learn more on Calculating the time to hear an echo here: brainly.com/question/16676723

#SPJ1

6 0
2 years ago
How do I solve for IQR?
____ [38]

Answer:

1.Order the data from least to greatest.

2.Find the median.

3.Calculate the median of both the lower and upper half of the data.

4.The IQR is the difference between the upper and lower medians.

Step-by-step explanation:

6 0
3 years ago
A father is three times as old as his son. In 14 years
frozen [14]
The answer is 42 because you times 14 by 3
6 0
3 years ago
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Please help!<br> The problem is in the picture
arlik [135]

Answer:

Step-by-step explanation:

Hope this helps if im wrong im dum:-:

3 0
3 years ago
I need help with this question, i am not exactly sure how to do it, help is veryy much appreciated
Jet001 [13]
Yeah i believe this question is a error!!if not it should be 88
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4 years ago
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