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EastWind [94]
4 years ago
15

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

Mathematics
1 answer:
Minchanka [31]4 years ago
3 0

Answer:

tn = 7 + (n - 1)*(-2) or

tn = 9 - 2n

Step-by-step explanation:

You are (beginning with 7) subtracting 2 from the term to the left.

a = 7

d = -2

tn = a1 + (n - 1)*d

tn = 7 + (n - 1)*(-2)

Try this out on n = 4

t4 = 7 + (4 - 1)*-2

t4 = 7 +  (3) (-2)

t4 = 7 - 6

t4 = 1 just as it says.

More generally

tn = 7 + (n - 1)*-2

tn = 7 + (-2n) + 2

tn = 9 - 2n

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Step-by-step explanation:

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3 years ago
jasper wants to paint one wall of his room. if the wall is 12 feet wide and 10 feet tall, what is the area of the wall?
Monica [59]

Answer:

120 square feet

Step-by-step explanation:

Area = length x width

Insert the two values. Width will represent height.

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Solve.

8 0
3 years ago
Help any 1 please!?​
sveticcg [70]

Yo sup??

total distance travelled by Janae =sum of distance on the 2 semicircles+ sum of the distances on the 2 track

=2πr+2*l

l=3 miles

r=1 mile

So,

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3 0
3 years ago
Please help asap !!!!!
Natasha2012 [34]

Answer:

<em>XY = 92 units</em>

Step-by-step explanation:

<u>Similar Shapes</u>

Two shapes are similar if all their corresponding side measures are in the same proportion.

The triangles UVW and YVX are similar because their side lengths are in the proportion 1:2, given the tick marks provided in the drawing.

This means that the measure of VX is twice the measure of VW,

The measure of YV is twice the measure of UV

The measure of XY is twice the measure of UW

This last proportion gives the equation:

z + 46 = 2z

Solving for z:

z = 46

Thus, XY = z+46 = 92

XY = 92 units

6 0
3 years ago
Rodrigo practiced playing the guitar 15 1/3 hours over the past 3 weeks.
Drupady [299]
D, because we already know how much he spent in total so it isnt B, trust me its D
6 0
3 years ago
Read 2 more answers
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