(PLEASE HELP ME WITH THIS QUESTION)

Mathematics

1 answer:

Romashka [77]3 years ago

5 0

Answer:

B is your answer

Step-by-step explanation:

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Which formula can be used to find the nth term of a geometric sequence where the fifth term is 1/16 and the common ratio is 1/4?

ale4655 [162]

Any geometric sequence can be expressed as:

a(n)=ar^(n-1), a=initial term, r=common ratio, n=term number

We are given that a(5)=1/16 and r=1/4 so we can say:

1/16=a(1/4)^(5-1)

1/16=a(1/4)^4

1/16=a/256

256/16=a

16=a

So the initial term is 16 so our formula is:

a(n)=16(1/4)^(n-1)

3 0

3 years ago

Read 2 more answers

Can some one help it's almost late

Morgarella [4.7K]

Then you better turn it in soon!

6 0

3 years ago

I need help fast will give brainliest!!!

kompoz [17]

Answer:B. Able Cable

Step-by-step explanation:

6 0

3 years ago

1. if m<b = 60 what is AB<br><br><br>2. if m<b =45 what is the perimeter of the trapezoid.

nika2105 [10]

Answer:....

Step-by-step explanation:

first we need to find the base of the triangle, so the total is 20, they also give us 12, so we subtract 20-12=8 now divide. 8/2=4. Now we use the 4 and the 60. We use SOH-CAH-TOA, they give us the base now we need to find AB which is the hypotenuse. So we take out the TOA, and the 4 is the adjacent so we take out the SOH, we have CAH now, so we use cos. Now equation time....

$cos60=\frac{4}{x}$ since x is the bottom we switch $\frac{4}{cos60}$ , which equals 8. AB=8.

Now to find the perimeter. We still use the 4 to find the hypotenuse so we can find the outside side. For this one they tell us to use 45, so now lets see what method we use. SOH-CAH-TOA. We need the hypotenuse and they give us the adjacent, so we use cos again. Now setting up the equation...

$cos45=\frac{4}{x}$ x is at the bottom again to we switch.