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3 years ago

What is the answer ???????

Mathematics

1 answer:

Neporo4naja [7]3 years ago

4 0

You have to calculate the probability that it lands on 4. There are 2 possibilities from the 8 that it lands on 4. So the chance is 2/8, which is the same as 4/16

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Two trains continuously travel between Washington D.C. and Baltimore which are 120 miles apart. The trains start simultaneously,

Alex73 [517]

Answer:

Step-by-step explanation:

Two train traveling in opposite direction

Distance apart the train is 120miles

Train A

Speed =30mph

Train B

90mph

What is common to the train is the same time, they will meet at the same time

Let assume they meet at distance x from from Washington

Then A has travelled x mile distance

Then, B has travelled 120-x mile distance

Time for train A to get to x,, = time for train B to get 120-x

Time=distance/speed

da/Sa=db/Sb

Let da be distance of train A

And db be distance of train B

Sa be speed of train A

Sb be speed of train B

Then,

da/Sa=db/Sb

x/30=120-x/90

Cross multiply

90x=3600-30x

90x+30x=3600

120x=3600

Then, x=3600/120

x=30miles

Then will meet at 30miles from Washington

Second part of the questions

Train B is faster than train A

Train B has already travelled 90miles while train B travels 30 miles

This shows that train A will not get to Baltimore before train B catch up

Then, let train A travel y distance

Then B will have to complete the 30 miles and then with another 30 miles that A has travel and then y

Total distance B travel will be

db=30+30+y

db=60+y

And da=y

Therefore,

da/Sa=db/Sb

y/30=60+y/60

Cross multiply

60y=1800+30y

60y-30y=1800

30y=1800

Then, y=1800/30

y=60miles

That means they will meet at 60miles from both Washington and Baltimore, or they are at mid points

3 0

3 years ago

Yulian works at the zoo feeding the animals. He puts water in the elephant habitat at the beginning of the day. The table shows

kodGreya [7K]

(y - 29) = 4 (x - 36)

6 0

4 years ago

Read 2 more answers

A florist sold 14 flower bouquets yesterday, including 7 lily bouquets. Based on past data, how many of the next 20 bouquets sol

tensa zangetsu [6.8K]

Answer:

Step-by-step explanation:

From past data:

Fraction of lily sold :

Total flowers / number of lily

Total flowers = 14

Number of lily = 7

Fraction of lily = 14 /7 = 1/2

Going by these ;

Expected number of lilies in the next 20 bouquets sold :

Fraction of lily * number of flower in bouquet

1/2 * 20

= 10 lilies

5 0

3 years ago

Compute the permutation.

Anon25 [30]

So you have 8 digits (number available) to form 3 digit numbers (number selected).

Using the formula $^{a} P_{c}$ where a is the number of available digits, P is the permutation function and c is the number of digits to be selected.

The number of three digit numbers that can be formed = $^{8} P_{3}$
= 336

 O R

By using the formula $Permutation = \frac{a ! }{( a - c) !}$ where a is the number of available digits and c is the number of digits to be selected.

⇒ $Permutation = \frac{8 ! }{( 8 - 3) !}$

⇒ $Permutation = \frac{40, 320 }{120}$

⇒ Permutation = 336

8 0

3 years ago

Give me 3 equivalent fractions for 10/30

Elis [28]

Answer:

1/3, 100/300, 20/60

Step-by-step explanation:

Just multiply or divide the numerator and denominator with the same number.

Hope this helps you :)

6 0

3 years ago