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Westkost [7]
3 years ago
13

2 numbers are such that if 7 is added to the first number, a number twice the second number is obtained. If 20 is added to the s

econd number, the number obtained is four times the first number. Find the two numbers​
Mathematics
1 answer:
Eduardwww [97]3 years ago
5 0

Answer:

1st= 47/7 or 6.71

2nd= 48/7 or 6.857

Step-by-step explanation:

1st number =X and 2nd number = Y

According to question, X+7=2Y

20+Y=4X

X=2Y-7 (from 1st condition)

putting in it second

20+Y=4(2Y-7)

20+Y=8Y-28

20+28=8Y-Y

48=7Y

Y=48/7

so X=2(48/7)-7

=96-49/7

47/7

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120÷24=5

5×54=270

270 People in 2 hours
3 0
3 years ago
Whats 9*20(10+20) First Answer Gets Brainliest
Tcecarenko [31]

Answer:

Your answer would be 5400.

Step-by-step explanation:

You have to follow PEMDAS for this one. You will start within the parenthesis and add 10 and 20 together to get 30. You would then times that by 20 and get 600. Finally, you would mulitply that by 9 and get 5400 as your answer..

3 0
3 years ago
Find a ratio equivalent to 8/3. Then, use te ratios to write a proportion
Galina-37 [17]
A ratio that is equivalent to 8/3 is 16/6.

Because:-  8*2= 16
                  3*2=6

16/6 is equivalent to 8/3

Writing a proportion:-

8/3=16/6
8 0
3 years ago
Read 2 more answers
the ratio of students with bikes to students with scooters in the school is 85:51. What is the greatest common factor that you c
Vikentia [17]
Answer:GCF=17

To find the greatest common factor, or GCF, of the numbers, we first need to list the prime factors of both 85 and 51

52=3*17

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17 is the sole common factor that these two numbers have in common, therefore 17 is the GCF.

To simplify the ratio, simply divide both numbers by 17.

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5 0
3 years ago
Read 2 more answers
The two-way table shows the estimated number of students who will enroll in three area high schools next year. a 5-column table
mr Goodwill [35]

Answer:

A. 0.2

Step-by-step explanation:

First make the table.

                                          <u>10-grade</u>  <u>11-grade</u>  <u>12-grade</u>  <u>Total</u>

<u>Woodson high school </u>    |     110     |     120    |      80     |   310   |

<u>Valley high school </u>          |     180    |     150    |     120     | 450   |

<u>Riverside high school </u>     |     160    |     140    |     200    | 500   |

<u>Total </u>                                 |     450   |     410    |     400    | 1260 |

Question: In decimal form, to the nearest tenth, what is the probability that a randomly selected riverside high school student is in twelfth grade?

First, find 12-grade and riverside high school number. 200. Take the total lined up with total number, which is 1260, and divide 200 divided by 1260.

200/1260=0.2

The answer is 0.2.

Hope this helps!

If not, I am sorry.

6 0
2 years ago
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