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3 years ago

What is 20% of 40%? Choices: 50% 75% 100% 200% Which is it?

Mathematics

2 answers:

ki77a [65]3 years ago

3 0

I think it's 8%

Step-by-step explanation:

Anni [7]3 years ago

3 0

Are these the only options? because when I'm figuring it out I go 10% of 40% is 4%, because 10% of 40 is 4. then you should just be able to double that to 8% If that's wrong then I'm really not sure

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3 years ago

Train a travel 175 miles in a four hours. for train b y=43.5x represents its rate of speed over the same 4 hours which train tra

stepan [7]

Answer:

Train A is faster by a factor of 1.01

Step-by-step explanation:

Given:

Train A:

Distance = 175 Miles

Time = 4 Hours

Train B:

y=43.5x

To Find:

which train travels at a faster rate in by what factor =?

Solution:

The speed of the train A = $\frac{Distance}{time}$

The speed of train A = $\frac{175}{4}$

The speed of train A = 43.75 miles per hour

Speed of the train B is the slope of the given line

The standard equation of the slope of the line is

y = mx+b

where m is the slope

and we are given with

y = 43.5x

So comparing with the standard equation

m = 43.5

Hence the speed of train B is 43.5 miles per hours

Train A travels faster

$Rate =\frac{\text{speed of train A}}{\text {Speed of train B}}$

$rate = \frac{43.75}{43.5}$

rate =1.01

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3 years ago