9, 4, -1, -7
Arithmetic because it has a common difference of 5.
4, 10, 16, 22
Arithmetic because it has a common difference of 6.
2, -6, 18, -54
Geometric because it has a common ratio of -3.
4, 4, 4, 4
Both because it has a common difference of 0 and a common ratio of 1.
Hope this helps :)
Answer:
It is xy
Step-by-step explanation:
3x - 9y - 5x - 7y
Combine like terms
( 3x + - 5x ) + ( - 9y + - 7y )
= - 2x - 16y
As fraction it would be 6/30 reduced 1/5 and as percentage 20% so 20% of the students were off.<span />
