Answer: common difference = -5
Step-by-step explanation:
This is an arithmetic progression. The common difference will be gotten by subtracting the 1st term from the 2nd term. This will be:
1st term = 12
2nd term = 7
3rd term = 2
Common difference = 7 - 12 or 2 - 7 = -5
It isn't an geometric progression as the ratio isn't thesame
= 2nd term / 1st term
= 7/12
= 3rd term / 2nd term
= 2/7
Therefore, it's an arithmetic progression with difference of -5
In 9 months you would make 157.5 in interest so if you add it to your already invested about of 500 dollars your account will have 657.50.
Answer: 
<u>Add () on 6</u>
<u>Multiply 6 on both sides</u>
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Answer:
Step-by-step explanation:
They are a sum of two like-term negative Integers, so just add them to get the above answer.
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Answer:
15 m
Step-by-step explanation:
cross-section area=1/2×45×x m ²
height = 30 m
volume=10125m³
we have
volume = cross-section area×height
10125 = ½×45×x×30
x=10125×2/(45×30)
x=15m
