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Gnoma [55]
2 years ago
10

Ina two digit number, the units digit is twice the tens digit. If the number is doubled, it will be 9 more than the number rever

sed. Find the number
Mathematics
1 answer:
lukranit [14]2 years ago
5 0

9514 1404 393

Answer:

  36

Step-by-step explanation:

Let the digits of the number be represented by t for the tens digit and u for the units digit.

  u = 2t . . . . . . . . the units digit is twice the tens digit

  2(10t +u) = (10u +t) +9 . . . . . double the number is 9 more than its reverse

Substituting for u, we have ...

  2(10t +2t) = 10(2t) +t +9

  24t = 21t +9 . . . . . . . . . . . collect terms

  3t = 9 . . . . . . . . . . . . . subtract 21t

  t = 3 . . . . . . . . . . . divide by 3

  u = 2t = 6 . . . . find u

The number is 36.

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alexgriva [62]

Answer:

1/6

Step-by-step explanation:

1/3 * 1/2 = 1/6

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A triangle has side lengths of (5k - 7) centimeters, (k - 4) centimeters, and
Yuki888 [10]

Answer:

-6m and -6k

Step-by-step explanation:

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2 years ago
If the probability of an events is 2/7 what must be the probability of its compliments
monitta

Answer:

The probability of its compliments = 0.7143 = 5/7

Step-by-step explanation:

The probability of an events = P= 2/7 = 0.2857

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3 years ago
Pls help extra points and mark brainlist
kipiarov [429]

Answer:

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Step-by-step explanation:

Hope that helps!

5 0
2 years ago
Read 2 more answers
A line passes through the point (-1,-5) and has a slope of -5.
Anna71 [15]
<h3>hello!</h3>

We're given a point that the line intersects and its slope.

Let's use Point-slope:-

\boxed{y-y1=m(x-x1)}

y1 = -5

m=-5

x1=-1

\boxed{y-(-5)=-5(x-(-1)}

\boxed{y+5=-5(x+1)}

Convert to slope-intercept:-

\boxed{y+5=-5x-5}

\boxed{y=-5x-5-5}

Finally,

\bigstar{\boxed{\pmb{y=-5x-10}}

<h3>note:-</h3>

Hope everything is clear; if you need any clarification/explanation, kindly let me know, and I will comment and/or edit my answer :)

5 0
1 year ago
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