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
Alex_Xolod [135]
3 years ago
14

Train passes the first 110 miles in 3 hours, and the next 240 miles at the rate of 60 mph. What was the average speed of the tra

in for the entire trip?
Mathematics
1 answer:
gogolik [260]3 years ago
7 0

Answer:

50 mph

Step-by-step explanation:

The total distance is 350 miles.

The total time is 3 hr + (240 mi / 60 mph) = 7 hr.

The average speed is 350 mi / 7 hr = 50 mph.

You might be interested in
Will give brainliest :)
Whitepunk [10]

Answer:

90 degrees

Step-by-step explanation:

BCO = 66

The whole ABC is 180

So BCO and  BDO = 90

Therefore BAO must = 90 degrees

5 0
2 years ago
Can someone help me please
NikAS [45]
Justin rides 550 kilometers
or
justin rides 17 meter
6 0
3 years ago
How do you figure this out
Ipatiy [6.2K]

4 \times 8 =  {32}^{2}  \\ 3 \times 3  =  {9 }^{2}  \\  {32 + 9 = 41}^{2}
7 0
3 years ago
Read 2 more answers
Find the value of w.
ch4aika [34]
W?
you mean x or z or O ???
xoxo
3 0
3 years ago
1. Let a; b; c; d; n belong to Z with n > 0. Suppose a congruent b (mod n) and c congruent d (mod n). Use the definition
lukranit [14]

Answer:

Proofs are in the explantion.

Step-by-step explanation:

We are given the following:

1) a \equi b (mod n) \rightarrow a-b=kn for integer k.

1) c \equi  d (mod n) \rightarrow c-d=mn for integer m.

a)

Proof:

We want to show a+c \equiv b+d (mod n).

So we have the two equations:

a-b=kn and c-d=mn and we want to show for some integer r that we have

(a+c)-(b+d)=rn. If we do that we would have shown that a+c \equiv b+d (mod n).

kn+mn   =  (a-b)+(c-d)

(k+m)n   =   a-b+ c-d

(k+m)n   =   (a+c)+(-b-d)

(k+m)n  =    (a+c)-(b+d)

k+m is is just an integer

So we found integer r such that (a+c)-(b+d)=rn.

Therefore, a+c \equiv b+d (mod n).

//

b) Proof:

We want to show ac \equiv bd (mod n).

So we have the two equations:

a-b=kn and c-d=mn and we want to show for some integer r that we have

(ac)-(bd)=tn. If we do that we would have shown that ac \equiv bd (mod n).

If a-b=kn, then a=b+kn.

If c-d=mn, then c=d+mn.

ac-bd  =  (b+kn)(d+mn)-bd

          =    bd+bmn+dkn+kmn^2-bd

          =           bmn+dkn+kmn^2

          =            n(bm+dk+kmn)

So the integer t such that (ac)-(bd)=tn is bm+dk+kmn.  

Therefore, ac \equiv bd (mod n).

//

3 0
3 years ago
Other questions:
  • Is 25/99 a repeating or terminating decimal?
    15·1 answer
  • Everett made 3/5 of the baskets he shot. Suppose he shot 60 baskets. How many did he make?
    10·2 answers
  • What is the distributive property for 8 times 19
    7·1 answer
  • What is 6.02 + 1.3 - _________ = 4.39
    13·1 answer
  • The company charges $ a0 per hour What is the value of b2 - 4ac for the following equation? x(x + 8) = 9
    6·1 answer
  • Can someone help me, it due by Friday pls
    14·1 answer
  • A ball is dropped from a treetop 256 feet above the ground. How long does it take to hit the ground? (s = 16t2)
    15·2 answers
  • Is 42 a factor of 7??
    13·2 answers
  • Tom has a 500 gallon pool. He is able to drain it at a rate of 15 gallons per minute.  if the pool still has 170 gallons of wa
    15·1 answer
  • What is equivalent to the expression 3x(x-2)+7x-1
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!