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topjm [15]
3 years ago
15

"the sum of the digits of a two-digit number is 13. reversing the digits produces a number that is 9 less than the original numb

er. what is the original number?"
Mathematics
1 answer:
Ksenya-84 [330]3 years ago
6 0
Suppose the one's digit is x, the ten's digit is y. the original number is 10y+x, the reversed number is 10x+y

x+y=13
(10x+y)=(10y+x)-9 =>9y-9x=9 =>y-x=1
Add the two equation to solve: 2y=14 =>y=7
x=13-7=6
the original number is 76. 


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There are 26 different possible outcomes. the probability of the computer choosing the first letter of your name is 1 out of 26.

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3 years ago
What is the constant of variation for the quadratic variation? 0.1y = 3x2
svet-max [94.6K]

Answer:

The constant of variation for the given quadratic equation is, 30

Step-by-step explanation:

One of the form of a quadratic equation is written as:

y = kx^2     ....[1]

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3 years ago
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5 0
3 years ago
The areas of two similar triangles are 9cm2, and 49cm2. One of the sides of the first triangle is 2cm. What is the length of the
BlackZzzverrR [31]

Answer:

4 2/3  cm

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--------   =  ------ =  -----------

small           3           2 cm

Using cross products

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3 0
3 years ago
in a park of 30 people, 15 were walking, 7 were playing and 6 were just running. find the percentage of people who were not doin
monitta

Answer:

6.67

Step-by-step explanation:

Because in the park there are 30 people OK

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Meaning there are still 2 people left so that is 6.67 =% of the people.

Hope it helps have a great afternoon:)

7 0
2 years ago
Read 2 more answers
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