Show:
Vocabulary
Adding Polynomials
Subtracting Polynomials
Multiplying Polynomials
#throwbackthursday
100
How many terms are in a trinomial?
Three
100
(x+5)+(3x+9)
4x + 14
100
(7x+4)-(5x+8)
2x-4
100
(3x+1)(2x+3)
6x2+12x+3
100
find b

29% decay

b=.71

200
What is the DEGREE of 2x4+9x3-5x2+6
4
200
(3x2+4x)+(2x2-3x)
5x2+x
200
(6x2+4)-(3x2+5)
3x2-1
200
(2x-5)(3x+2)
6x2-4x-10
200

Write an exponential equation given (0,81) and (3, 243)

y=81(1.44)x

300
How many terms are in this polynomial? 4y5+6xy-3x2
Three
300
(-4x2+2x-3)+(5x2-4x+8)
x2-2x+5
300
(2x-4)-2(4x-2)
-6x
300
(2x-4)(3x2-6x+1)
6x3-24x2+26x-4
300

On July 5th, a slice of watermelon was left out on the back porch. That evening, 4 fruit flies discovered it and began using it as a food source. From that day forward, the fruit fly population grew by 25% each day.

Write and use an exponential function to represent the expected population of the fruit flies on July 20th if this growth rate continues.

y=4(1.25)x

400

Write an example of a polynomial with 4 terms and degree of 3.

McMurphy will check!

400
(8x2-4x+3)+(7x2+2x-11)
15x2-2x-8
400
(6x2-5x+8)-(4x2-7x+9)
2x2+2x-1
400
(2x2-4x+6)(x2+5x-2)
2x4+6x3-18x2+38x-12
400

In 2010, the price of a share of ChocoBuzz stock was $8. By 2020, the price had increased to $256.

Write an exponential function to model the growth of ChocoBuzz stock. Then, use the function to predict the price of the stock in 2025.

y=8(1.414)x

$649.28.

500
Like terms need to have...(two things!!)
1. Same variables 2. Same exponents
500
(5x3+4x2-2x+2)+2(2x3-2x2+x+5)
9x3+12
500
(6x3+4x2-4x+5)-2(2x3-3x2+5x-5)
2x3+10x2-14x+15
500
Ms. Waters wants to know how many desks can fit in her classroom next year. The length of her classroom is x+5 ft and the width of her classroom is x-4 ft. What is the area of her classroom? Area = lw
x2+x-20 square ft
500

In 1995, the first home DVD player was released and sold for $1,200. As technology advanced, the cost began to depreciate by 10% each year.

Write and use an exponential function to represent how much a DVD player would cost in 2020 if this rate continued.

$86.40.

y=1200(0.90)x