3 years ago

D(n)=-5(1/2)^n-1 what is the 3rd term in the sequence

Mathematics

1 answer:

Studentka2010 [4]3 years ago

7 0

Answer:

-1.25

Step-by-step explanation:

Better to write this as

a(n)= -5(1/2)^(n-1)

Then the 3rd term is a(3) = -5(1/2)^(3 - 1), or a(3) = -5(1/2)^2 = -5/4 = -1.25

You might be interested in

Enter an expression for the perimeter of the given figure. Simplify the expression.

marishachu [46]

Step-by-step explanation:

2(19.2) + 4(x + 7)

= 66.4 + 4x

= 4(16.6 + x)in

3 0

3 years ago

In trapezoid TRAP, the parallel bases are TP and RA

Westkost [7]

9514 1404 393

Answer:

UV is not the midline. (The midline length is 4.5.)

Step-by-step explanation:

The trapezoid midline is the average of the lengths of the bases. Here, the midline length would be ...

(7 ft +2 ft)/2 = (9 ft)/2 = 4.5 ft

The line length shown is 3.5 ft, so the segment shown is not the midline.

5 0

3 years ago

Divide -20.40 and -4

MaRussiya [10]

-20.40 divided by 4 equals 5.1

3 0

3 years ago

If wallpaper costs $1.25 per squared foot, how much will it cost to put mew wallpaper in a room with area dimensions of 17 ft lo

AleksandrR [38]

The area of the room is :

$\begin{gathered} A=17\cdot16 \\ A=272 \end{gathered}$

and if the cost is 1.25 per square foot then the total cost will be:

$272\cdot1.25=340$

is $340 dollars

6 0

1 year ago

Is -5^2 equal to (-5)^2

gtnhenbr [62]

Yes, these 2 equations are equivalent

3 0

3 years ago

Read 2 more answers