Help picture below problem 18
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Given :
400 reduced by 3 times my age is 241
To Find :
My age .
Solution :
Let, age is x .
So , expressing given condition mathematically , we get :
Therefore, the age is 53 years.
Hence, this is the required solution.
Answer:
This system have 9000 different numbers.
Step-by-step explanation:
We know that the internal telephone numbers in the phone system on a campus consists of 4 digits, with the 1st not equal to 0.
We have total 10 digits.
In the first place we have 9 possibilities, because from the conditions of the task in the first place there cannot be 0.
In second, third and fourth place we have 10 possibilities.
Therefore, we get
This system have 9000 different numbers.