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vodka [1.7K]
3 years ago
8

How many 4-digit numbers are possible if the hundreds digit is 8 and if repetition of digits is allowed?

Mathematics
1 answer:
ratelena [41]3 years ago
7 0
There are 10 digits from 0 to 9
When you say 4 digit number that means it can't start with zero, then
1) there are 9 ways to chose the 1st digit (excluding zero)
2) there are only 1 ways to chose the 2nd digit (only 8))
3) there are 10 ways to chose the 3rd digit
4) there are 10 ways to chose the 4th digit

TOTAL NUMBER OF WAYS: 9 x 1 x 10 x 10 = 900

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Diego's club earns money for charity when members of the club perform community service after school,each student who does commu
Arlecino [84]

Answer:

No

Step-by-step explanation:

Given that:

Amount earned when a student does comminty service = $5

Number of students in club = 12

Amount earned E, is a function of number of members (n) who does community service.

Hence,

E = n * amount earned per member

Is 24 a possible output?

To test, then E = 24

24 = n * 5

24 = 5n

24/5 = 5n/5

4.8 = 5

Hence, 24 is not a possible output, be use number of membwra cannot be a decimal

4 0
4 years ago
HELP PLS I NEED IT ASAP
AnnyKZ [126]

Answer:

X=18

Step-by-step explanation:

Pentagon = 540 degrees total

Find Known Angel total:

95+ 90= 185

subtract from 540:

540-185=355

add all unknown angles together:

(7x-4)+ (3x+23)+(9x-6)= 19x+13

set up equation and solve

19x+13=355

19x=355-13

19x= 342

x=342/19

x=18

6 0
3 years ago
(9+radical -4)-(5+ radical -16)
Jobisdone [24]

16

Step-by-step explanation:

(9 + radical - 4) - (5 + radical - 16)

9 + radical - 4 - 5 - radical + 16

9 - 4 - 5 + 16 + radical - radical

= 16

6 0
3 years ago
Simplify:
My name is Ann [436]

<u>Answer</u>

3 square root of 7



<u>Explanation</u>

square root of 3 times square root of 21

√3 × √21 = √(3×21)

                  = √63

                  = √(9×7)

                  = √9 × √7

                    = 3 × √7

                   = 3√7

The answer is 3 square root of 7


4 0
3 years ago
Find the common ratio to the sequence <br><br> -125,-25,-5,-1
Ne4ueva [31]

Answer:i think that it is multiply by 5 cause 1* -5 = -5



Step-by-step explanation:  5*-5=-25

25*-5=-125


5 0
3 years ago
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