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Advocard [28]
3 years ago
14

If w varies inversely with the square root of t and w = 5 when t = 49,

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
5 0

Answer:

x=k/y

w=k/t

5=k/√49

5=k/7

k=5×7

k=35

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The length of a Train A is 480 m and it takes 2 minutes to cross a tunnel of length 1,320 m. The length of a Train B, which is s
nasty-shy [4]

Answer: 52.94

Step-by-step explanation:

Length of train A = 480m

Tunnel length = 1320m

Time taken to cross tunnel = 2 mins = 120sec

Length of train B = 420m

Train B is slower than train A

Difference between their speed = 18km/hr

18km/hr = (18×1000)/3600 = 5m/s

Speed of train A :

Speed = distance / time

Speed = 1320 / 120 = 11m/s

Therefore, speed of train B :

(11 - 5)m/s = 6m/s

Relative speed of the two trains is therefore;

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Note : they are moving in opposite direction

( 11 + 6)m/s = 17m/s

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Time taken = (480m + 420m) / (17m/s)

Time taken = 900m / 17m/s

Time taken = 52.94s

4 0
2 years ago
Find the surface area of the composite figure.
taurus [48]

Answer:

surface area is 39

Step-by-step explanation:

add the areas of each geometric figure making up the composite 3D figure.

first 3D figure

2+2+6+6

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from third 3D figure

4+4+10+5

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may be!! I'm not sure bout this answer

3 0
2 years ago
Solve for x 49 = 2592/x
adoni [48]

ok so basically x=1/2 which is the exact form. and the decimal form is x=0.5  Step-by-step explanation:

6 0
2 years ago
What is the value of the expression 4⁴?​
Ghella [55]

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256 is the answer

Step-by-step explanation:

4×4×4×4=256.

3 0
3 years ago
Go to your math tools and open the Graph tool to graph Gwen's and Tristan's equations. Hint: To create the graph, select the cor
poizon [28]

Answer:

Step-by-step explanation: when you first open the graphing tool you have to click relationship and choose custom. put in gwen’s equations (y=100+10x) then go to relationship and choose custom again and put in tristan’s equation (y=12.5)

also click on the settings button at the bottom of the graph and put the x axis to -100 min and 100 max and for y axis put -1000 min and 1000 max or you could choose your own numbers but thats just what i put

4 0
3 years ago
Read 2 more answers
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