Which rule can you use to find the nTH term of an arithmetic sequence in which the common difference is 5 and a12 = 63?

2 answers:

4 0

Arithmetic, nth = a + (n - 1)d, common difference, d = 5

a₁₂ = a + (12 -1)d = 63

a + 11d = 63

a + 11*5 = 63

a = 63 - 11*5

a = 63 - 55

a = 8

So the nth term = a + (n - 1)d = 8 + (n - 1)5

8 + 5*(n - 1)

8 + 5n - 5

8 - 5 + 5n

3 + 5n

So nth term = 3 + 5n

Charra [1.4K]3 years ago

3 0

Answer:

Step-by-step thi explanation:

You might be interested in

How is it false, please explain

Vadim26 [7]

You did not put a picture or a question

3 0

3 years ago

O A PQR is reflected over the x-axis. What are the coordinates of O'?

topjm [15]

Answer:

(8,-2)

Step-by-step explanation:

When reflecting something across the X axis the y axis coordinate is the one that will change to put the position further up or down. In this case we are moving it down to the same amount below the axis that it is now above it. That means that since it is currently 2 above the X axis it would then be 2 below the X axis making it at -2 so the coordinates would be (8,-2)

I hope this helps and please don't hesitate to ask if there is anything still unclear!

7 0

3 years ago

Read 2 more answers

) Sarah donated one-tenth of her salary to an orphanage, one-third of her salary is spent on food, one-fourth of salary on rent

AleksAgata [21]

Answer:

₹ 4000

Step-by-step explanation:

Sarah's salary =₹ 30000