Answer:
90 arrangements
Step-by-step explanation:
Since there are no repititions of letters, there are unique 10 letters in total.
THe number of arrangements would be 2 permutation 10. We need the formula for permutation. That is:
Now, n = 10 [total] and r is 2, so we have:
So, there can be 90 arrangements
B
It's the only one with an addition sign...... seems logical, let me know if you got it correct
64-18+2
Hope this helps...
The answer is b. the range of Greta's graph is y<0