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creativ13 [48]
3 years ago
8

Sum of two digit number is9.When we interchange the digits it is found that the resulting new number becomes twice the other num

ber. What are the numbers
Mathematics
1 answer:
ruslelena [56]3 years ago
8 0

Answer:

4 and 5

Step-by-step explanation:

Let the numbers be x and y

If their sum is 9, hence;

x + y = 9 ....1

When reversed

10y+x = 2(10x+y)

10y+x = 20x + 2y

10y - 2y = 20x - x

8y = 19x

y = 10x/8 ...2

Substitute equation 2 into 1;

From 1;

x+y = 9

x +(10x/8) = 9

18x/8 = 9

18x = 72

x = 72/18

x = 4

Since x+y =9

y = 9-x

y =9-4

y = 5

Hence the numbers are 4 and 5

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Five times a number is divided by 7 more than the number. If the result is 2 then what was the original number?
Gala2k [10]

the number=A

5xA/7+A=2

5A/7 +A =2

5A/7=2-A/1

7(2-A)=1(5A)

14-7A=5A

14=5A+7A

14/12=12A/12

A=14/12

A=7/6

7 0
3 years ago
Please answer, thank you. Image below.
vovikov84 [41]

Answer:

Top Image: 56°

Bottom Image: 134°

Step-by-step explanation:

I'm not sure which image you have a question on, so I'll just solve both.

Top Image:

 We know that the sum of the angles will add up to 180 and that the angles of the triangle are f, f, and 68°. Therefore, we can set up the following equation:

f + f + 68° = 180°

Solving this gets f = 56°

Bottom Image:

  We know that the sum of the angles will add up to 180 and that the angles of the triangle are 23°, 23°, and g. Therefore, we can set up the following equation:

 23° + 23° + g = 180°

Solving this gets g = 134°

5 0
2 years ago
I kinda need help nah I definitely need help
xxMikexx [17]

Answer:

<BCD = 128, <ECD = 52

Step-by-step explanation:

(3x + 5) + (x + 11) = 180

4x + 16 = 180

4x = 164

x = 41

<BCD is complimentary to <ACE which is (3x + 5). (3 * 41 + 5) = 128

<ECD is complimentary to <ACB which is (x + 11). (41 + 11) = 52.

4 0
3 years ago
The product of a whole number and unit fraction 2/3
anastassius [24]
Can you add the whole question I think it may be 6/4
5 0
3 years ago
Line AB contains point A(4,5) and B(9,7). What is the slope of AB
True [87]
5/2 



   Your welcome
Your welcome
6 0
3 years ago
Read 2 more answers
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