1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
umka21 [38]
3 years ago
8

The sum of the speed of two trains is 722.7 miles per hour. If the speed of the first train is 3.3 mph faster than the second tr

ain find the speeds of each
Mathematics
1 answer:
stellarik [79]3 years ago
7 0
x-speed\ of\ first\ train\\x-3.3-speed\ of\ second\ train\\\\x+x-3.3=722.7\\x+x=722.7+3.3\\2x=726\\x=363\\\\x-3.3=363-3.3=359.7\\\\Speed\ of\ first\ train\ is\ 363 mph,\ speed\ of\ second\ train\ is\ 359.7.
You might be interested in
Find the value of x.
Triss [41]

Answer:

D

Step-by-step explanation:

The midsegment AC is half the sum of the parallel bases, that is

AC = \frac{DF+EB}{2} , then

x = \frac{13+9}{2} = \frac{22}{2} = 11 → D

6 0
3 years ago
What is the solution to 34x + 95 = 3 (14X +9)
Leya [2.2K]
X=17/2
Decimal form : x=8.5
8 0
3 years ago
Read 2 more answers
The mean number of words per minute (WPM) typed by a speed typist is 149149 with a standard deviation of 1414 WPM. What is the p
Semmy [17]

Answer:

The probability is  P(\=  X  >  x ) = 0.78814

Step-by-step explanation:

From the question we are given that

     The population  mean is  \mu  =  149

     The standard deviation is  \sigma  =  14

     The random number    x  =  147.81

      The sample  size is  n  = 88

The probability that  the sample mean would be greater than P(\=  X  >  x ) =  P( \frac{ \= x   -  \mu   }{\sigma_{\= x} }  > \frac{ x - \mu  }{\sigma_{\= x} }  )

Generally the z- score of this normal distribution is mathematically represented as

       Z  =  \frac{ \=  x   -  \mu  }{\sigma_{\= x} }

Now

        \sigma_{\= x } =  \frac{\sigma }{\sqrt{n} }

substituting values

         \sigma_{\= x } =  \frac{14 }{\sqrt{88} }

         \sigma_{\= x } =  1.492

Which implies that

         P(\=  X  >  x ) =  P( Z  > \frac{ 147.81  - 149   }{ 1.492}  )

        P(\=  X  >  x ) =  P( Z  > -0.80  )

Now from the z-table  the  probability is  found to be

        P(\=  X  >  x ) = 0.78814

5 0
3 years ago
Which property is illustrated by the statement?
Gelneren [198K]

Answer:

The Associative Property of Addition

Step-by-step explanation:

illustrated by the statement (3+2.8) + 5= 3+(2.8 +5). So D

6 0
3 years ago
Two companies offer digital cable television as described below. Company A: $39.99 per month no installation fee Company B: $34.
lana66690 [7]
The answer to this question is located on google
4 0
3 years ago
Other questions:
  • If sin (2x) = cos (7x), then what is the value of x
    13·1 answer
  • The function h(t) = 210 – 15t models the altitude of a hot air balloon over time t, in minutes.
    7·2 answers
  • based on simple interest find the total amount saved your old principal equals $1,700 rate equals 6% x equals 5 years
    5·1 answer
  • I need help ASAP it's being timed oh and I need you to show your work! I'll give brainliest!!!
    7·2 answers
  • In ΔABC shown below, ∠BAC is congruent to ∠BCA: Triangle ABC, where angles A and C are congruent Given: Base ∠BAC and ∠ACB are c
    15·1 answer
  • Need both boxes filled plz thanks
    5·1 answer
  • Which of the following represents the equation of a line that is parallel to 2y - x = 16 and passes through the
    7·1 answer
  • WILL GIVE BRAINLIEST. NEED HELP ASAP
    6·2 answers
  • 20.<br><br> What is the end behavior of the function?
    10·1 answer
  • Assume Sid the Saver is earning 0.5% interest on his savings account while 1 point
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!