Answer:
x - 10y - xy + 4
Step-by-step explanation:
(6xy+4x−8y)−(3x+2y+7xy−4)
= 6xy+4x−8y−3x-2y-7xy+4
= 6xy-7xy+4x−3x−8y-2y+4
= x - 10y - xy + 4
Your formula is %/100 = is/of
cross multiply your equation would be 100 x 45= 26x
then you solve the equation so multiply 100 and 45 then divide that answer by 26
The number of different 8 digit phone numbers we can have that do not contain the digit 2 is 43046721 numbers
Since there are 10 digits in our number system from 0 to 9, and we are looking for the number of different 8-digit phone numbers that do not contain the digit 2, we would be one digit short. So, for each digit position, we would have 10 - 1 digits = 9 digits.
Since we have 8 places for each digits, for the first place, we have 9 digits. For the second place, we have another 9 digits and so on till we get to the 8 th digit place.
So, for all 8 digit places, we have 9 × 9 × 9 × 9 × 9 × 9 × 9 × 9 × 9 = 9⁸.
So, the number of different 8 digit phone numbers we can have that do not contain the digit 2 is 9⁸ numbers = 43046721 numbers.
Thus, the number of different 8 digit phone numbers we can have that do not contain the digit 2 is 43046721 numbers.
Learn more about multiplication principle of counting here:
brainly.com/question/1091225
Answer:
1 ruler costs £4 and 5 rulers cost £20