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3 years ago

13

A train 180m long travels through a station at 60 km/h. Find how many seconds it takes for the train to pass a person who is sta

nding on the station platform

1 answer:

kompoz [17]3 years ago

6 0

Answer:

180sec

Step-by-step explanation:

180÷60

3

1min =60seconds

60×3

=180secinds

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Suppose that you want to mix two coffees in order to obtain 100 pounds of a blend. If x represents the number of pounds of coffe

Fantom [35]

Answer:

The required expression that represents the number of pound of coffees B is $100-x$

Step-by-step explanation:

Consider the provided information.

You want to mix two coffees in order to obtain 100 pounds of a blend.

Let x represents the number of pounds of coffee A and y represents the number of pounds of coffee B.

The obtained weight is 100 pounds.

$x+y=100$

$y=100-x$

Hence, the required expression that represents the number of pound of coffees B is $100-x$

8 0

3 years ago

Can someone help me factorise 14b - 7

REY [17]

Find the common denominators for 14 and 7

7 is the common denominator

factor it out

14b - 7

7(2b - 1)

7(2b - 1) is your answer

hope this helps

8 0

3 years ago

Read 2 more answers

The one i chose is wrong i think help.

const2013 [10]

Answer:

You are correct

Step-by-step explanation:

collinear means that they are on the same line, so they are collinear because of the definition of collinear

7 0

3 years ago

Please help with this Geometry worksheet.

Marianna [84]

Answer:

1. x= 122(answer on pdf=n)

2. x=38(answer on pdf=s)

7. x=26(answer on pdf=l)

8. x=14(answer on pdf=p)

13. x=22(answer on pdf=b)

14. x=12(answer on pdf=k)

Step-by-step explanation:

Supplementary angle for number 1 so 58+x=180

180-58=x=122

Number 2 is a complimentary angle so 52+x=90

90-52=x=38

Number 7 is a complimentary angle so 64+x=90

90-64=x=26

Number 8 it states that the angles are equal so 4x=56

56/4=x=14

Number 13 is a supplementary angle so (6x-2)+50=180

(180-50+2)/6=x=22

132/6=x=22

Number 14 is complimentary so 8x-6=90

96/8=x=12

4 0

4 years ago

if A and B together can do a piece of work in 10 days and B along can do it in 15 days, how many part of the work does A complet

anzhelika [568]

Answer:

1/5

Step-by-step explanation:

Well work can be defined as: $work = rate \ *\ time$

where rate=amount of work that can be done in one unit of time

let a = rate of work A does in a day

let b = rate of work B does in a day

this means that: $10a + 10b=1$ where work=1 and it just means the entire job has been completed.

Since b can do it alone in 15 days, this means that: $15b=1$

If we divide by 15 here, we get the equation: $b=\frac{1}{15}$

We can now use this definition to substitute it into the first equation we made.

$10a + 10(\frac{1}{15}) = 1$

Multiply the 10 and 1/15

$10a+\frac{2}{3}=1$

subtract 2/3 from both sides

$10a=\frac{1}{3}$

Now divide both sides by 10

$a=\frac{1}{30}$

Now multiply this by 6, since we a represents the amount of work that can be done in a day, we want to find how many parts of the work can be done by a in 6 days

$6a=\frac{6}{30}$

Now divide both the numerator and denominator by 6

$a=\frac{1}{5}$

8 0

2 years ago