All categories

3 years ago

F(n+1)=-10f(n). If f(1)=1, what is f(3)?

Mathematics

1 answer:

lisov135 [29]3 years ago

6 0

-19 is the answer cuz 1-10-10 is -19.

You might be interested in

20/12=15/x find x plz help

Ganezh [65]

Answer:

$x = 9$

Step-by-step explanation:

To find x, we first have to solve the equation given in the question:

$\frac{20}{12} = \frac{15}{x}$

$20x = 15 \cdot 12$

$x = \frac{180}{20}$

$x = 9$

Therefore, x = 9.

Hope this helped!

3 0

3 years ago

Read 2 more answers

Cathy has to deposit $410 worth of five- and tendollar

iogann1982 [59]

(# of five dollar bills=f ; # of ten dollar bills=t)
3t-1=f ⇒ this means that if there were 1 $5 bills, there would be 2 $10 bills.
So the ratio of $5 bills to $10 bills is 1 to 2.
We can plug that into another equation:
f+t=410 ⇒ I havent actually learned this in school yet so I just made a chart: $10 ║ $5
------║------
2 ║ 1 = $25
4 ║ 2 = $50
6 ║ 3 = $75
8 ║ 4 = $100
10 ║ 5 = $125
and so on...
you probably found the pattern already, so you can conclude that [cathy deposited 16 five dollar bills and 33 ten dollar bills]

Also, you should probably check if there are any mistakes when going through this since I took almost an hour writing this.

6 0

3 years ago

A furniture store owner buys a sofa for $400 and marks it up %90 to sell it. During the stores anniversary sale she sells the so

lord [1]

Answer:

Anniversary sale price= $570

Step-by-step explanation:

Giving the following information:

Purchase cost= $400

Mar-up percentage= 90%

First, we need to calculate the "normal" selling price:

Selling price= 400*1.9= $760

Now, we can determine the anniversary sale price:

Anniversary sale price= 760 - (760*0.25)= $570

3 0

3 years ago

Please help with the question below in the picture.

RideAnS [48]

Answer:

Topic: Angles

If you like to venture further, feel free to check out my insta (learntionary). I'll be constantly posting math tips and notes! Thanks!

8 0

3 years ago

On three rolls of a single die, you will lose $19 if a 3 turns up at least once, and you will win $5 otherwise. What is the

kondaur [170]

Answer:

-16 cents

Step-by-step explanation:

We are given that on three rolls of a single die, you will lose $19 if a 3 turns up at least once, and you will win $5 otherwise.

We are to find the expected value of the game.

P (at least one 5 in three rolls) = 1 - P (no. of 3 in three) = $1-(\frac{3}{6} )^2$ = 0.875

P (other results) = 1 - 0.875 = 0.125

Random game value = -19, +5

Probabilities: 0.875, 0.125

Expected game value (X) = 0.875 × (-19) + 0.125 × (5) = -16 cents

Therefore, every time you play the game, you can expect to lose 16 cents

8 0

3 years ago

Read 2 more answers