N can be 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 over or under the correct amount
Answer:
-2a²
Step-by-step explanation:
The question is 2a × -a
This means 2a(-a)
= -2×(a×a)
=-2(a²)
=-2a²
Answer: 57 pennies and 63 quarters
Step-by-step explanation:
Answer:
15/30:2/30
15/30=2/30x
divide by 15/30
7.5 is x
Step-by-step explanation: