Geometric Sequence
Write an equation for the sequence.
5, 20, 80, ...
y = 5(4)n-1
Determine if the following function represents a growth or decay
y = 3(2)x
Growth
An ebayer purchases a rookie card of a NFL player for $30. Each year, the card's value triples. Write a function the gives the value y after x years.
y = 30(3)x
Write the equation for $1200 at 18% compounded annually for 2 years.
y=1200(1 + .18/1)1*2
You have the first 3 terms of an arithmetic sequence.
What is the order of subtraction to find the value of x?1st, 2nd, 3rd
2nd - 1st = 3rd - 2nd
Write an equation for the sequence.
-1, -7, -49, ...
y = -1(7)n-1
Determine if the following function represents a growth or decay
y =12(1/2)x
Decay
A spam on DM on instagram was sent to 6 of Jay's friends. The number of people who got the DM increases by 25% every week. Write a function that describes the number of people y who got the email after x weeks.
y = 6(1+.25)x
Write the equation for $3000 at 24% compounded monthly for 3 years?
y=3000(1+.24/12)12*3
The first 3 terms of an arithmetic sequence are
2x + 3, 5x - 2, 10x - 15
What did I do wrong?
5x-2-2x+3=10x-15-(5x-2)
5x-2-2x+3=10x-15-5x+2
3x+1=5x-13
1=2x-13
14=2x
7=x
Missing parentheses
Write an equation for the sequence
-2, 10, -50, ...
y = -2(-5)n-1
What is the percent increase in the equation
y = 20(1.4)x
40%
When Amy gave birth 8 people knew about it. The number of people increased by 3.2% every day. Write a function for the number of people y who knew about it after x days.
y = 8(1+.032)x
Write the equation for $400 at 2.5% compounded semiannually for 5 years?
y=400(1+.025/2)2*5
What did I do wrong?
5x+2-(x-4)=10x-2-(5x+2)
5x+2-x+4=10x-2-5x-2
4x-2=5x-4
-2=x-4
2=x
+ 2 + 4 = 6
Write an equation for the sequence
18, 6, 2, ...
y = 18(1/3)n-1
What is the percent increase in the equation
y = 7(1.02)x
2%
The amount of bird feed in a 2 cup feeder decreases by 30% each day. Write an equation for the amount left y after x days.
y = 2(1-.3)x
Write the equation for $1200 at 5.2% compounded yearly for 6 years?
y=1200(1+.052/1)1*6
What did I do wrong?
4x-2-(5x+4)=2x-4-(x-6)
4x-2-5x-4=2x-4-x+6
x-6=x+2
-6=2
4x - 5x = -1x
Write an equation for the sequence
20, -10, 5, ...
y = 20(-1/2)n-1
What is the percent decrease in the equation
y = 300(0.8)x
20%
A person has a bacterial infection. When they go to the doctor they have 2 million bacteria. After taking the antibiotic, the population decreases by 25% each day. Write an equation for the population y after x days.
y=2(1-.25)x
Write the equation for $5000 at 0.2% compounded daily for 6 years?
y=5000(1+.002/365)365*6
The first 3 terms are x + 10, 2x + 7, 5x - 10
What did I do wrong?
2x+7-(x+10)=2x+7-(5x-10)
2x+7-x-10=2x+7-5x+10
x-3=-3x+17
4x-3=17
4x=20
x=5
Wrong order on the right side of equation.