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3 years ago

Divide Rs240 in the ratio 3:5

Mathematics

1 answer:

Marat540 [252]3 years ago

4 0

240/8=30
30x3=90
30x5=150

90:150
(Can check answer as it adds up to 140)

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a number set consists of {4，5，6，7}。How many 2-digit combinations of numbers from the data set can be divided by 3？

kifflom [539]

Answer:

Step-by-step explanation:

This trick works with 3:

If the sum of the digits of a number is divisble by 3 then the number is divisble by 3.

44 is not divisble by 3 because 4+4=8 is not divisble by 3.

45 is divisble by 3 because 4+5=9 is divisble by 3.

46 is not divisble by 3 because 4+6=10 is not divisble by 3.

47 is not divisble by 3 because 4+7=11 is not divisble by 3.

54 is divisble by 3 because 5+4=9 is divisble by 3.

55 is not divisble by 3 because 5+5=10 is not divisble by 3.

56 is not divisble by 3 because 5+6=11 is not divisble by 3.

57 is divisble by 3 because 5+7=12 is divisble by 3.

64, 65,67 are not divisble by 3 because their digits' sums are 10,11, and 13 respectively. 66 is a winner because 6+6=12 is divisble by 3.

Finally 7...

74,76,77 are not divisble by 3 because their digits' sums are 11,13, and 14 respectively. 75 is divisble by 3 because 7+5=12 is divisble by 3.

The victors are

4 0

3 years ago

Give the slope and the y-intercept of the line y = x – 4.

Airida [17]

Given:

The equation of a line is

$y=x-4$

To find:

The slope and y-intercept of the line.

Solution:

We have,

$y=x-4$ ...(i)

The slope intercept form of a line is

$y=mx+b$ ...(ii)

Where, m is the slope and b is the y-intercept.

On comparing (i) and (ii), we get

$m=1,b=-4$

Slope of the line = 1

y-intercept of the line = -4

The coordinate form of y-intercept is (0,b). So, the y-intercept of the given line is (0,-4).

Therefore, the slope of the line is 1 and the y-intercept is (0,-4).

5 0

3 years ago

Three friends arrive at a party their arrival increases the number of people at the party by 20% in total how many people are no

rodikova [14]

Answer:

18 people

Step-by-step explanation:

Let the number of people at the party before the arrival be x

20% of x = 3

20/100 * x = 3

20x = 300

x = 300/20

x = 15

Adding the friends , we have 15 + 3 = 18

5 0

3 years ago

What decimal is smaller than 0.8

VashaNatasha [74]

Answer:

0.79

Hope this helps :)

6 0

3 years ago

Read 2 more answers

La matemática financiera experimentó grandes avances con la creación de la banca y los negocios creados por los emprendedores. E

Tresset [83]

Answer:

c = $\frac{1}{10}$

f= 1500

Step-by-step explanation:

Tenemos la siguiente ecuación

$C = f+cm$

Tenemos los siguientes valores para m=15000, c = 3000 y para m = 20000, c=3500. Es decir, tenemos las siguientes ecuaciones

$3000=f+c15000, 3500=f+c20000$

Si restamos la segunda ecuación de la primera, tenemos que

$3500-3000 = f-f+(20000c-15000c)$

Luego

$500 = 5000c$

Entonces $c = \frac{500}{5000} = \frac{1}{10}$

Si tomamos la primera ecuación, tenemos que $3000-\frac{15000}{10} = f$ . Es decir,

$3000-1500 = f = 1500$

Esta solución, al plantear 2 ecuaciones y dos incógnitas, plantea un sistema dos por dos.

8 0

3 years ago