Answer:
(a) 900
(b) 648
(c) 180
(d) 600
Step-by-step explanation:
If there are no restrictions, there are 10 possible values for each digit of a three-digit number.
(a) The leading digit cannot be zero
There are 9 options for the first digit and 10 for the remaining digits.
(b) The leading digit cannot be zero and no repetition of digits is allowed.
(c) The leading digit cannot be zero and the number must be a multiple of 5.
If a number is a multiple of five, it must end in 0 or 5
(d) The number is at least 400.
If the number is at least 400, the first digit can only be 4, 5, 6, 7, 8 or 9. There are no restrictions for the remaining digits.
Answer:30
Step-by-step explanation:
Answer:
5.50x + 2y ≤ 18
Step-by-step explanation:
Romona has a total of $18 and she has to spend it on dog food.
Dry god food cost $5.50 per bag and wet dog food cost $2.00 per can.
We have to write an inequality to show the above condition.
Let the number of dry and wet dog food she buys be x and y.
The total cost of dog food must be less than $18.
Then,
5.50x + 2y ≤ 18
This is the required linear inequality.
Answer: 40%
Step-by-step explanation:
Let the percentage of 22 that gives 8.8 = x% ---------------------------1
Therefore,
x% of 22 = x/100 x 22 ------------------2
since this gives 8.8, we now equate to equation 2
x/100 x 22 = 8.8
(22 x X )/100 = 8.8
22x/100 = 8,8
Now cross multiply to solve for x
22x = 8.8 x 100
22x = 880
Now divide through by 22 to get the require value of x
x = 880/22
x = 40%
