Answer:
1. Not possible
2. Possible
3. 24
4. C
5. D
Step-by-step explanation:
Some key concepts to remember:
- One -to -one means each element has an element only it matches to. This is only possible when sets have the same number of elements. #1 doesn't but #2 does.
- To determine the number of one-to-one correspondence, use a factorial with the number of elements. 4 is the number and the factorial is 4! = 4*3*2*1 = 24.
- n(A) means the cardinal number of the set or the number of unique elements. Elements count only once even if they repeat. There are 5 in #4 and 12 in #5.
Answer: $1.50
Step-by-step explanation:
The item's normal price is $15.
Han uses a 10% off coupon so he saves 10% which is:
= 15 * 10%
= $1.50
He therefore bought the item for $8.50.
7x + 18 > -3
7x > -3 - 18
7x > - 21
x > -21/7
x > -3 <===
Hi!
There is no way to tell what the means are.
To find the mean of a data set, you need to know how many numbers are in it, and what they all are. We don't know either of these. Therefore, D is your answer.
Hope this helps! :)
-Peredhel