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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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Answer:

B. 2 in.

Step-by-step explanation:

First, put the two perimeters together to form a fraction.

192/48, which can simplify to 4/1

Now, following the order in which you put the perimeters (I used C/D,) set it equal to the sides.

\frac{4}{1}  =  \frac{8}{x}

Now, cross multiply. (multiply 1 and 8, 4 and x.)

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Now, solve.

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2 years ago
Need help, please thanks
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3 years ago
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Answer: 1.1 Nm

Step-by-step explanation:

The formula for torque is T = r · F · sin θ

where θ = π/6, r = 20 cm = 0.2 m, F = 11 N

formula for converting radians to degrees is 1 rad × 180/π = 57.296°

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Substituting r into the formula for torque, we have

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3 0
3 years ago
The area of a parallelogram is 54 ft2. If the base of the parallelogram is 6 feet, what is its height?
m_a_m_a [10]

Answer:

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Step-by-step explanation:

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