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Alexus [3.1K]
3 years ago
5

Write the statement for the problem in mathematical language. Use x for the tens digit and y for the unit digits in the two digi

t numbers. Find the two-digit number which is 2 times the sum of its digits
Mathematics
1 answer:
Nutka1998 [239]3 years ago
8 0

Answer:

  18

Step-by-step explanation:

A two-digit number (xy) will have the value 10x+y. The sum of its digits is x+y.

You want ...

  10x +y = 2(x +y)

  1 ≤ x ≤ 9

  0 ≤ y ≤ 9

The equation can be simplified to ...

  8x = y

The only single-digit values for x and y that satisfy the requirements are ...

  x = 1, y = 8

The two-digit number of interest is 18.

_____

<em>Check</em>

Its sum of digits is 1+8 = 9. 2×9 = 18.

_____

<em>Comment on the relationship in the problem</em>

Many of us learned our multiplication tables for 9s by remembering that the sum of digits of 9n was 9, and that the leading digit of the product was n-1.

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1. a 

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time = 300/15
time = 20 hrs


7. The ratio between 12 and 8 is 1.5, so you need to divide every other number by 1.5.
2/1.5=1.3

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8. So, problem statement tells you that 1lb = 16oz and that 1oz = 28.3g. That means that 1lb = 16 * 28.3g = 452.8g

You have three items, convert their weights to grams:
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4 0
3 years ago
Read 2 more answers
What is the coefficient in the following expression <br><br>5+3x+ (-3)​
polet [3.4K]

Answer:

The coefficient is 3.

Step-by-step explanation:

The coefficient is the number that is grouped with an unknown number represented by a letter.

7 0
3 years ago
What is the slope of a line that is perpendicular to the line whose equation is 3x+5y=4?
kap26 [50]

Answer:

5/3 or 1.67

Step-by-step explanation:

Find the slope of the original line

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5y = - 3x + 4           Divide both sides by 5

y = (-3/5)x + 4

The original line has a slope of - 3/5 or - 0.6

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m1 * m2 = - 1

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m2 = -1/(-3/5)

m2 = 5/3

The slope of the perpendicular line is

5/3 or 1.67

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3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
Which of the following tables is not an example of a linear function. And please explain why
Maslowich

Answer:

D

Step-by-step explanation:

In the other tables, their y values have a constant rate of change while as D does not.


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2 years ago
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