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
Three research departments have 9 , 6 , and 8 members, respectively. Each department is to select a delegate and an alternate to
erastova [34]
The should be 158 ways, because 9*8+8*7+6*5=158.
6 0
3 years ago
49 - 3 + 9 times 8 divided by 2
irinina [24]

Answer:

82

Step-by-step explanation:

49 - 3 + 9 times 8 divided by 2

6 0
3 years ago
Read 2 more answers
Complete to get an equal ratio<br> 3x/y = ? /2y
amid [387]

Answer:

6x

Step-by-step explanation:

3x/y=x/2y

Since 2y is 2X greater than y, 6x is 2X greater than 3x.

So,

The answer is 6x.

5 0
3 years ago
Does (1, 4) make the inequality 4x + 2y = 16 true
Fiesta28 [93]

Answer:

no it is false.

Step-by-step explanation:

Because The left side 12 does not equal to the right side 16, which means that the given statement is false.

4 0
3 years ago
Find the surface area of puzzlecube 5.7 ​
sveticcg [70]

Answer:

9units squared

Step-by-step explanation:

A standard rubix cube is 3 by 3 and therefor 3 x 3 is 9

8 0
3 years ago
Other questions:
  • Help me!!!!!!!!!!!!!!!!!
    6·1 answer
  • Which equation is written in slope-intercept form?
    13·1 answer
  • 30-x=(-12) What is the variable?
    8·2 answers
  • Help me look at the Circled question
    13·1 answer
  • Define the word evaluate. in complete sentences
    10·1 answer
  • FIFTEEN POINTS, PLEASE HELP!!!!<br> Find the value of x.<br><br> x=8<br> x=10<br> x=16<br> x=20
    13·2 answers
  • PLEASE HELP WITH 4 AND 5!!!
    13·2 answers
  • PLEASEEE HELP!!! Which equation represents the total cost, y, for x hours of student ski lessons and a lift ticket?
    14·2 answers
  • Please helpppppppppppppppp
    10·2 answers
  • The current price of a school t-shirt is $10.58. Next year the cost of a t-shirt will be $15.35.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!