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3 years ago

PLEASE HELP ME WITH THIS THANKS

Mathematics

1 answer:

Lady bird [3.3K]3 years ago

6 0

What is M when R = 200? *

Step-by-step explanation:

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What is the difference between these two integers? −14 − (+6) =

sladkih [1.3K]

Answer:

-14-6=-20

Step-by-step explanation:

the negative sign gives you a negative 6, which you can subtract from -14, giving you -20.

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3 years ago

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julsineya [31]

Answer:

Step-by-step explanation:

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3 years ago

Subtract 23.4 − 8.78 =_____

Alona [7]

14.62 super simple, good luck with any other questions!

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4 years ago

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Math 107

Jlenok [28]

Answer: 3.7 percent is the answer

Step-by-step explanation:

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3 years ago

Find an explicit rule for the nth term of a geometric sequence where the second and fifth terms are -6 and 162, respectively.

Vesna [10]

Answer:

b. an = 2 • (-3)^(n - 1)

Step-by-step explanation:

Before we test a solution or two, we can easily discard most of them.

We see the values alternate of signs (-5 for the 2nd term and +162 for the 5th term)... so the progression factor has to be negative (in order to alternate sign). That already excludes answers A and C.

Normally, a geometric progression has the (n-1) exponent, not (n+1), so our chances seem to be better with B.

We can test both D and B with n = 2, to obtain -6

Let's test answer D before:

$a_{2} = 2 * (-3)^{2+1} = 2 * (-3)^{3} = 2 * -27 = -54$

The result is -54, not -6... so it's not the right result.

Let's test answer B then:

$a_{2} = 2 * (-3)^{2-1} = 2 * (-3)^{1} = 2 * -3 = -6$

Right! Let's verify with n=5 to get 162:

$a_{5} = 2 * (-3)^{5-1} = 2 * (-3)^{4} = 2 * 81 = 162$

Confirmed, answer is B. an = 2 • (-3)^(n - 1)

3 0

3 years ago