The tree diagram represents an experiment consisting of two trials. (Enter the probability to the hundredths place. Do not round
.)
.6, A, .3, C, .7, D,
.4, B, .2, C, .8, D
P(D) = [ ? ]
please no links
.6, A, .3, C, .7, D,
.4, B, .2, C, .8, D
P(D) = [ ? ]
please no links
1 answer:
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The formula of t in terms of s , ,
is
The value of t when s = 310 , = 75 ,
= 80 is 2 hours
Step-by-step explanation:
Two trains left the cities A and B at the same time and headed towards
each other
- The cities are s miles apart
- The first train was traveling at the speed of
mph
- The second train was traveling at the speed of
- After t hours the two trains met each other
∵ The cities are s miles apart
∵ After t hours the two trains met each other
∴ s = +
, where
is the
distance that the 1st train moved in t hours and
is the distance that the 2nd train moved in t hours
∵ s = v t
∴ =
t
∴ =
t
- Substitute them in the equation of s
∴ s = t +
t
- Take t as a common factor in the right hand side
∴ s = t ( +
)
- Divide both sides by ( +
)
∴
The formula of t in terms of s , ,
is
∵ s = 310 m/h
∵ = 75 m/h
∵ = 80 m/h
- Substitute these values in the formula of t above
∴
∴ t = 2 hours
The value of t when s = 310 , = 75 ,
= 80 is 2 hours
Learn more:
You can learn more about distance, speed and time in brainly.com/question/1748290
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