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sergiy2304 [10]
3 years ago
5

What is the nth term of the arithmetic sequence? 7, 5, 3, 1, …

Mathematics
2 answers:
taurus [48]3 years ago
6 0
An=a1+d(n-1)
an=nth term
a1=first term
d=common difference

7 is first term=a1
the common difference is -2, they increase by -2 each time
an=7-2(n-1)
expand and distribute
an=7-2n+2
an=9-2n

C is answer
vampirchik [111]3 years ago
6 0
Hello,

a(1)=7=9-2*1
a(2)=5=9-2*2
a(3)=3=9-2*3
..
a(n)=?=9-2*n

Answer C







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Given:

There are given the edge of the cube-shaped aquarium has 3 feet.

Explanation:

To find the value, we need to use the volume of the cube formula:

So,

From the formula of volume:

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Put the value of edge into the above formula:

Then,

\begin{gathered} V=a^3 \\ V=3^3 \\ V=27cube\text{ feet} \end{gathered}

Now,

The water has a density of 62 pounds per cube foot.

According to the question:

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62\times27=1674pound

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No, the density of water would not change.

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