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11111nata11111 [884]
3 years ago
10

The tens digit of a two-digit number is five more than the units digit. Seven times the sum of the digits of this number is 3 le

ss than the number itself. Find the number.
Mathematics
2 answers:
snow_tiger [21]3 years ago
7 0

Answer:

The correct answer is 94

Step-by-step explanation:

I am Lyosha [343]3 years ago
3 0

Answer:

43

Step-by-step explanation:

Let

The unit digit = x

The tens digit = y

The number = 10x + y

The tens digit of a two-digit number is five more than the units digit.

y = x + 5

Seven times the sum of the digits of this number is 3 less than the number itself.

7(x + y) = 10x + y - 3

7x + 7y = 10x + y - 3

Find the number.

We substitute x + 5 for y

7x + 7(x + 5) = 10x + (x + 5) - 3

7x + 7x + 35 = 10x + x + 5x - 3

14x + 35 = 11x + 5x - 3

Collect like terms

35 + 3 = 11x + 5x -14x

38 = 16x - 14x

38 = 2x

x = 38/2

x = 19

Solving for y

y = x + 5

y = 19 + 5

y = 24

The number = 19 + 24

= 43

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valentinak56 [21]
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The second function is in a different format, so you just have to isolate Y. 

-1/3x + y = -1
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both of the functions have the same slope, but different y-intercepts. therefore, they'll never touch. making them infinite solutions.

it's also A because both of the slopes are positive, the slopes in graph D are negative.

So, the answer is A.

Hope this helps! xx


4 0
3 years ago
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Serjik [45]
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I need help with this question
goldenfox [79]
Take a picture of your work and send it so I can help you
3 0
3 years ago
What is the answer? ​
Ivan

Answer:

78

Step-by-step explanation:

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3 0
3 years ago
Read 2 more answers
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Lapatulllka [165]
372819388338822814738288919147477483822 okay i guess
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