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Luba_88 [7]
3 years ago
7

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

Mathematics
2 answers:
Step2247 [10]3 years ago
5 0
Hello,

a(2)=-6
a(3)=-6*r
a(4)=-6*r²
a(5)=-6*r^3=162
a(5)/a(2)=r^3=162/(-6)=-27==>r=-3

a(1)=-6/(-3)=2
a(2)=2*(-3)
a(3)=2*(-3)²
a(4)=2*(-3)^3
a(5)=2*(-3)^4

a(n)=2*(-3)^(n-1)




Answer
wlad13 [49]3 years ago
4 0

Answer:

an = 2 • (-3)^n - 1

Step-by-step explanation:

I have taken the test and this is the correct option :)

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The two-way table shows the estimated number of students who will enroll in three area high schools next year. a 5-column table
mr Goodwill [35]

Answer:

A. 0.2

Step-by-step explanation:

First make the table.

                                          <u>10-grade</u>  <u>11-grade</u>  <u>12-grade</u>  <u>Total</u>

<u>Woodson high school </u>    |     110     |     120    |      80     |   310   |

<u>Valley high school </u>          |     180    |     150    |     120     | 450   |

<u>Riverside high school </u>     |     160    |     140    |     200    | 500   |

<u>Total </u>                                 |     450   |     410    |     400    | 1260 |

Question: In decimal form, to the nearest tenth, what is the probability that a randomly selected riverside high school student is in twelfth grade?

First, find 12-grade and riverside high school number. 200. Take the total lined up with total number, which is 1260, and divide 200 divided by 1260.

200/1260=0.2

The answer is 0.2.

Hope this helps!

If not, I am sorry.

6 0
2 years ago
123 Savings and Loan charges a monthly fee of $8 on checking accounts and an overdraft protection fee of $33. Neela's check regi
Nimfa-mama [501]

Answer:

The account statement had an ending balance of $153

Step-by-step explanation:

Check register actual balance= $256

Less; Written check= -$312

The account is short; $256-$312= -$56

Add the new deposit =-$56+$250= $194

Therefore , new account balance= $194

Subtract fees($8 & $33) from the balance= $194- $8- $33=$153

The account statement had an ending balance of $153

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The difference between a number and 7 is greater than -23
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-23 is a negative number so that means 7 is a greater number. any number with a minus sign like this - means it’s a negative number, so any number that you have to compare it to and if that number has nothing before or after it, then that would be the greater number
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2 years ago
I need help with this it's urgent!
borishaifa [10]

Oh shucks man, I'm sorry bout that

4 0
2 years ago
X=5 and y=7<br><br>9y+x= ?<br><br>i need help );​
Phoenix [80]

Answer:

Step-by-step explanation:

All we need to do is substitute the y and x. This would then look like:

9y + x =

9 × 7 + x =

9 × 7 + 5.

Can you solve it from here?

6 0
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