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hram777 [196]
3 years ago
13

A recursive rule for an arithmetic sequence is a1=−3;an=an-1+7

Mathematics
2 answers:
babunello [35]3 years ago
7 0

Answer:

a_{n}=7n-10

Step-by-step explanation:

Givens

a_{1}=-3\\a_{n}=a_{n-1} +7

The formula to find the iterative rule of an arithmetic sequence is

a_{n}=a_{1}+(n-1)d

Where d=7 and a_{1}=-3, replacing these values, we have

a_{n}=-3+(n-1)7\\ a_{n}=7n-7-3\\ a_{n}=7n-10

Therefore, the right answer is the first choice: a_{n}=7n-10

charle [14.2K]3 years ago
6 0
C is the answer. Hope you get a good grade
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A circle has An area of 36 pi square inches which best represents the circumference of the circle.
kkurt [141]

Answer: 12πins.

Step-by-step explanation:

Since the area if a circle = πr²

From the question

Area of the circle = 36πins²

To find the circumference of the circle, we need to find the common radius of the circle and this could be achieved from the area of the circle given above.

πr² = 36π, solving this gives. Divide through by π

r² = 36

r = +/-√36

= +/-6

Now to find the circumference of the circle, we substitute for r in the formula below.

Circumstances = 2πr

= 2 ×π × 6

= 12πins.

4 0
3 years ago
Find a set of parametric equations of the line with the given characteristics. (Enter your answer as a comma-separated list of e
emmainna [20.7K]

This question is incomplete, the complete question is;

Find a set of parametric equations of the line with the given characteristics. (Enter your answer as a comma-separated list of equations in terms of x, y, z, and t.) The line passes through the point (3, 1, 2) and is parallel to the line given by x  = y = z.

Answer:

the set of parametric equations of the line with the given characteristics are; x = t+3, y = t+1, z = t+2

Step-by-step explanation:

Given that;

line x = y = z and point ( 3, 1, 2 )

the given line can be written as;

[x-0 / 1] = [y-0 / 1] = [z-0 / 1]

if two lines are parallel directional ratios are equal.

so DIRECTIONAL RATIOS  of given line is ( 1, 1, 1 )

therefore required line is;

[x-3 / 1] = [y-1 / 1] = [z-2 / 1] = t

⇒ [x-3 / 1] = t

x = t+3

[y-1 / 1] = t

y = t+1

[z-2 / 1] = t

z = t+2

Therefore the set of parametric equations of the line with the given characteristics are; x = t+3, y = t+1, z = t+2

8 0
3 years ago
Need help please explain why its the answer and show work<br><br> Look at picture
bonufazy [111]

Answer:

14.a

15.c

16.d

Step-by-step explanation:

i choose these because they are in the geometry book

6 0
3 years ago
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7 0
4 years ago
Two trains are traveling at a constant rate. Which train has the greater speed?
aniked [119]

AnswerAccording to my caculations its B

Step-by-step explanation:Just trust me

4 0
3 years ago
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