2 years ago

Did I get these all right

Mathematics

1 answer:

Leviafan [203]2 years ago

3 0

Yep! They are all right! Great job, could write a bit better.... sorry

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In an arithmetic sequence {an}, if a1 = 5 and d = 3, find a72. A) 216 B) 218 C) 221 D) 223

Phoenix [80]

The arithmetic sequence with the given condition is determined recursively by

$\begin{cases}a_1=5\\a_n=a_{n-1}+3&\text{for }n>1\end{cases}$

So we have

$a_2=a_1+3$

$a_3=a_2+3=a_1+3(2)$

$a_4=a_3+3=a_1+3(3)$

and so on with the general pattern

$a_n=a_1+3(n-1)$

This means the 72nd term in the sequence is

$a_{72}=a_1+3(72-1)=5+3(71)=218$

so the answer is B.

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3 years ago

18.4= y-13 I have to solve for y

bagirrra123 [75]

Answer:

y=31.4

Step-by-step explanation: Just add 18.4 to 13.

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3 years ago

Read 2 more answers

Suppose f(x) = x2 and g(x)= (1/4x)2 Which statement best compares the

Umnica [9.8K]

Answer:

B. The graph of g(x) is the graph of f(x) horizontally stretched by a factor of 4.

I just did it off of A.P.E.X

7 0

3 years ago

(PLEASE SHOW UR WORK)

Lostsunrise [7]

First you wanna distribute the 3 to x and 4
So the problem will then be 3x+12= 27
Then you wanna subtract 12 from 27
You get 3x = 15
Now you wanna divide 3x and 15 by 3
You then get X = 5

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3 years ago

Lori has 12 1/2 pounds of flour. She needs 1 3/4

12345 [234]

She can make 7 1/7 batches of cookies :)

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2 years ago