1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Umnica [9.8K]
3 years ago
14

How many different 2-digit numbers are there with the following property: the tenth digit is greater than the units digit?

Mathematics
1 answer:
EastWind [94]3 years ago
8 0

Answer:

There is 45 different 2-digit numbers.

Step-by-step explanation:

My way is kinda dumb, but it still works. So, 2 digit numbers is from 10-99. We can start from the 10-19 first.

10, 11,12,13,14,15,16,17,18,19

We need to find the numbers that the tenth digit is greater than the units digit.

<u>10</u>, 11,12,13,14,15,16,17,18,19

Since 1 is the tenth digit, all the ones digits are all going to be bigger. Same goes with 20-29. Then you will have 2 numbers that the tenth digit is greater. My way applies when the tenth digit is only less than the ones digit, not greater. If you do this way...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

10-19: 1 number

20-29: 2 numbers

30-39: 3 numbers

40-49: 4 numbers

50-59: 5 numbers

60-69: 6 numbers

70-79: 7 numbers

80-89: 8 numbers

90-99: 9 numbers

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

So, if you add 1+2+3+4+....+9(which all of you probably memorized by now) it would be 45. The answer is 45. Hope this helped!

You might be interested in
If Ill m, solve for x.<br> (9x+2)<br> 119°<br> x =
Sav [38]

Answer:

x=13

Step-by-step explanation:

119-2=117

117÷9=13

9×13+2=119

3 0
2 years ago
Can someone please explain to me how to solve this problem?
Svetradugi [14.3K]
Bro that is so easy!!
3 0
3 years ago
What would X is less than or equal to negative 7 look like as a graph
Anastaziya [24]

Answer:

Place a dot on 7 and do < underlined

8 0
3 years ago
Guys I need your help , what is - 16t2 + 64+ + 3?
bija089 [108]

Answer:

the answer is -32t + 67

Step-by-step explanation:

-16t2 +64 + 3

= -16t x 2 +64 +3

= -32t +67

3 0
3 years ago
Read 2 more answers
Find 5/7 ÷ 3 and how did you find it
Zarrin [17]

Answer:

5/21

Step-by-step explanation:

1. 5/7 divided by 3 is the same as 5/7 divided by 3/1

2. when dividing a fraction, multiply by the reciprocal, so it would be 5/7 times 1/3

3. multiply the numerator and denominators, so 5x1 and 3x7

4. the answer is 5/21

hope this helped!  

6 0
2 years ago
Read 2 more answers
Other questions:
  • A tortoise travels 2/12 miles per hour describe two different methods to determine the number of miles it will take to walk 3 2/
    14·1 answer
  • Eighth grade &gt;<br>V.13 Multiply using the distribu<br>Simplify the expression:<br>3(3 + 4y)​
    8·1 answer
  • henry had 20 convertibles and 5 trucks in his miniature car collection.After Henry's aunt bought him some more miniature trucks,
    9·2 answers
  • Please help!!! <br><br><br> Question is in pic attached . (^_^)_/
    15·2 answers
  • Tristan bought school supplies. He bought a
    11·1 answer
  • Plan out an experiment that you could use to demonstrate experimental and theroretical probability
    10·1 answer
  • The expression. 3(5^2 +2x+4)-4(4x^2 +2x+3) equals?
    15·1 answer
  • A playground is rectangular with a length of 78 miles. If the area of the playground is 820 square miles, what is its width? Inp
    13·1 answer
  • Simplify:<br><br> (2/d^2)^3<br><br> Please help :)
    15·2 answers
  • If VW≅VY, WX = s + 69, and XY = 4s, what is the value of s?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!