3 years ago

Need help so baddddd

Mathematics

2 answers:

stepan [7]3 years ago

8 0

It would be 90%. 18 is 90% of 20

vampirchik [111]3 years ago

5 0

Answer:

90%

Step-by-step explanation:

18/ 20 = 18 × 5 20 × 5 = 90 100 = 90%.

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A train is moving at an average speed of 180 m/s. how long will it take to reach the station. Both stations are 80 km apart?

Alexxandr [17]

1 km = 1000 meters.

Find total meters: 80 km x 1000 meters per km = 80,000 meters.

Divide total meters by the given speed:

80,000 meters / 180 m/s = 444.44 seconds.

1 minute = 60 seconds

444.44. Seconds / 60 seconds per minute = 7.41 minutes = 7 minutes 24.42 seconds

Total time = 7 minutes 24.42 seconds

Round as needed.

4 0

3 years ago

How will the volume of a cube change if its edge becomes twice as long; 3 times as long; 10 times as long; n times as long?

Mumz [18]

Let, initial side is a.

When side is n times long, new side na.

Initial volume, $V_i=a^3$

Final volume, $V_f=(na)^3=n^3a^3$

Change in volume, $V_f-V_i=\Delta V =a^3(n^3-1)$

For, n = 2 :

$\Delta V = 7a^3$

n = 3 :

$\Delta V = 26a^3$

n = 10 :

$\Delta V = 999a^3$

Hence, this is the required solution.

8 0

3 years ago

1. Find the length of the missing side: 35cm 60.5°

Tems11 [23]

Answer:

23.52 cm

Step-by-step explanation:

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3 years ago

The equation cos (35 degree)= a/25 can be used to find the length of Line segment B C. Triangle A B C is shown. Angle A C B is a

labwork [276]

Answer:

20.5 Inches

Step-by-step explanation:

I just took the review so this is a verified answer.

6 0

3 years ago

Read 2 more answers

Answers are O - 17 O - 16 O - 15 O - (-16)

Rasek [7]

Interior angles on parallel lines cut by a traversal are supplementary (they add up to 180°). These can be identified as "c" angles, due to their shape. Knowing this, we can figure out the value of x:
7x+(2x+36)=180
7x+2x+36=180
Simplify the equation
9x+36=180
Collect like terms
9x=144
Divide by 9 on both sides to isolate x
x=16

5 0

4 years ago