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Paladinen [302]
2 years ago
9

1. Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 s?

Mathematics
2 answers:
sveta [45]2 years ago
6 0
1. 100 * 20
2. 7 hours
3. 141 kilometers
4. 8.5 hours
5. 55.75 mi/h
HACTEHA [7]2 years ago
5 0

Answer:

1. 100/20

2. 7 h

3. 141 km

4. 8.5 hours

5. 56 mi/h

Step-by-step explanation:

(dimensions are omitted)

1. speed = distance/time

speed = 100/20

2. time = distance/speed

time = 315/45 = 7 h

3. distance = speed*time

distance = 35.25 * 4 = 141 km

4. time = distance/speed

to the lake: time = 216/48 = 4.5 h

from the lake: time = 216/54 = 4 h

total time:  4.5 + 4 = 8.5 h

5. speed = distance/time

first trip: speed = 203/3.5 = 58 mi/h

second trip: speed = 243/4.5 = 54 mi/h

average speed = (58 + 54)/2 = 56 mi/h

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ryzh [129]

Answer:

The total cost of the lunch including the tip is $15.21.

Step-by-step explanation:

To find the total cost of the lunch including the tip, first, you need to calculate 17% of the price of the lunch as the statement indicates that that is the tip Joseph leaves the waiter:

$13*17%=$2.21

Now, you need to add that amount to the price of the lunch:

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According to this, the answer is that the total cost of the lunch including the tip is $15.21.

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In △XYZ, m∠Z = 34, x = 61 cm, and z = 42 cm. Find m∠X. Round your answer to the nearest tenth of a degree.
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Using the Law of Sines, we have:
\frac{\sin{Z}}{z}=\frac{\sin{X}}{x}
\\
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Cross multiplying gives us
61(sin 34) = 42(sin X)

Divide both sides by 42:
(61(sin 34))/42 = (42(sin X))/42
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Take the inverse sine of both sides:
sin⁻¹((61(sin 34))/42) = sin⁻¹(sin X)
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8 0
1 year ago
Jordan solved the equation −7x + 25 = 48; his work is shown below. Identify the error and where it was made. −7x + 25 = 48 Step
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Answer:

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Step-by-step explanation:

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anzhelika [568]

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The answer is D

Step-by-step explanation

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Answer:

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Step-by-step explanation:

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