The answer is B. 10 vertices because it all depends on the edges. You have to subtract the edges by faces/vertices to get your faces/vertices so 20-12 is 10 so you are correct

4 0

3 years ago

What is the equation that represents the sequence in this problem ? Find the price after the 8th month

AVprozaik [17]

ANSWER

$\begin{gathered} a_n=ar^{n\text{ - 1}} \\ a_8\text{ = \$38.26} \end{gathered}$

EXPLANATION

The problem represents a geometric progression.

The general form of a geometric sequence is:

$a_n=ar^{n\text{ - 1}}$

where a = first term

r = common ratio

The first term from the table is the first price (for the first month). That is $80.00

To find the common ratio, we divide a term by its preceeding term.

Let us divide the price of the second month from the first.

We have:

$\begin{gathered} r\text{ = }\frac{72}{80} \\ r\text{ = 0.9} \end{gathered}$

The price after the 8th month is the value of a(n) when n = 8

So, we have that:

$\begin{gathered} a_8\text{ = 80 }\cdot0.9^{(8\text{ - 1)}} \\ a_8\text{ = 80 }\cdot0.9^7 \\ a_8\text{ = \$38.26} \end{gathered}$

5 0

1 year ago

Find the value of x in the following quadrilateral

vlabodo [156]

Answer:

The answer is 63.31

Step-by-step explanation:

$2x - 5 + 3x - 42 + x + \frac{3}{7} x = 360 \\ \frac{45}{7} x = 360 + 47 \\ x = 63.31$

6 0

3 years ago

Find 92% of 120. I'd appreciate it.

Karo-lina-s [1.5K]

Answer:

110.4

Step-by-step explanation:

4 0

3 years ago

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