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2 years ago

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

Mathematics

1 answer:

Serggg [28]2 years ago

7 0

Answer:

Step-by-step explanation:

Simply start by listing out the numbers from smallest to largest.

We start out with the smallest number following this information being the number 10. The next are 21 and 20. The next are 32, 31, and 30. We can start to see a pattern. If the ten's digit is n, then there are n numbers within that ten-group that have a greater 10's digit than unit's digit. The largest ten-group (90 to 98) has 9 integers following the rules established. Thus, the number of 2-digit integers that have ten's digits greater than units digit is 1+2+3+...+9=45

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In 2003, the population of an African country was about 19.5 million people, which is 1 million more than 5 times the population

RideAnS [48]

Answer:

Part 1) An equation is 15.7=3p+1

Part 2) The approximate population in 1950 was 4.9 million people

Step-by-step explanation:

Let

p -----> the population in 1950 in million people

y -----> the population in 2003 in million people

we know that

y=3p+1 -----> equation A

y=15.7 ----> equation B

substitute equation B in equation A and solve for x

15.7=3p+1

3p=15.7-1

3p=14.7

p=4.9

therefore

The approximate population in 1950 was 4.9 million people

5 0

3 years ago

Solve for b. ab + c = d. <br>(d - c)/a<br>a + c/d <br>a/(c-d)

Stels [109]

Answer:

you are super nice to let me do this

Step-by-step explanation:

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- Audrina

6 0

4 years ago

the ratio of the number of pigs to the anumber of horse in a farm is 2 to 3 if there are 24 horses what is the number of pigs

Dima020 [189]

Pigs to horse
2 pigs to 3 horses
Pigs(n) to 24 horses

24/3= 8
2 x 8= 16

16 pigs to 24 horses

I hope this helped, have a nice day

5 0

3 years ago

In 4 hours, the temperature steadily fell from 0 degrees Fahrenheit to -12 degrees Fahrenheit. What was the average change in te

Vsevolod [243]

Answer:

-3 degrees per hour

Step-by-step explanation:

4 0

3 years ago

What are the answers to all of these asap please!!

Snezhnost [94]

1 5/15 = 20/15
2 4/6 = 16/6 = 8/3
4 3/12 = 51/12
5 8/6 = 38/6 = 19/3
4 18/24 = 114/24 = 19/4
3 9/2 = 15/2

i wasn't sure if you wanted them reduced into an inproper fraction or just reduced as the mixed number, so i made them into inproper fractions. hope this helps!!

7 0

3 years ago