Find a8 in the arithmetic sequence when a1=-9 and d=7

Mathematics

2 answers:

abruzzese [7]3 years ago

8 0

Answer:

Step-by-step explanation:

The n th term of an arithmetic sequence is

$a_{n}$ = $a_{1}$ + (n - 1)d, hence

$a_{8}$ = - 9 + (7 × 7) = - 9 + 49 = 40

IrinaK [193]3 years ago

3 0

What do you mean let me see a picture of the problem

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frutty [35]

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Step-by-step explanation:

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Step-by-step explanation:

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2 years ago

Kevin wants to measure the area of his living room. The living room is a rectangle with a semi-circular alcove. What is the area

Anna007 [38]

Answer:

$A_{living\ room}=A_{rectangle}+A_{semi-circle}\\\\A_{living\ room}=lw+\frac{\pi r^2}{2}$

Step-by-step explanation:

<u> You did not provide the dimensions of the living room, so I will give you a general explanation of the procedure you need to apply to solve the exercise:</u>

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The area of a rectangle can be calculated with the following formula:

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