03/10 3wk Review

Identify the a, b and c

4x² – 8x = 3

Remember it should = 0

• a = 4, b = -8, c = 3

• a = 4, b =-8, c =-3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = -3

What type of function is f(x)=2(1/7)^x ?

Is b greater than 1 or less than 1?

• Exponential Growth

• Linear

• Exponential Decay

• None of the Abovee

Tags

CCSS.HSF-IF.C.8B

Solve the equation.

x² + 13x + 40 = 0

Menu - 3, 3, 1

• -8, 5

• -40, -1

• 5, 8

• -8, -5

Tags

CCSS.HSA-REI.B.4B

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

y=a(1+r)^x for growth

y=a(1-r)^x for decay

• y=5000(0.7)^x

• y=30(5000)^x

• y=5000(1.3)^x

• y=5000x^x

Tags

CCSS.HSF.LE.A.2

Find the solutions

2x² - 3x = 2

• x = 1, x = -1

• x = -1/2, x = 2

• x = 1/2, x = 2

• x = 1/2, x = 1

Tags

CCSS.HSA-REI.B.4B

Write an equation that models the following situation:

Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

y=a(1+r)^x for growth

y=a(1-r)^x for decay

• y=6(0.14)^x

• y=6(1+14)^x

• y=6(1.14)^x

• y=6(0.86)^x

Tags

CCSS.HSF.LE.A.2

Which of the following functions is equivalent to  $y=-3(x+5)^2-4$  

• y = 9x² - 15x + 21

• y = -3x² - 75x - 4

• y = 9x² + 90x + 221

• y = -3x² - 30x - 79

Jame's 70 in. giant peach doubles in size every week. Write an expression that would represent how big the peach is after 5 weeks.

• 70(2)³⁵
• 70(2)⁵
• 2(70)⁵
• 5(70)²

Tags

CCSS.HSF.BF.A.2

Which of the following functions is equivalent to 
 $y=4(x+2)^2-8$ 

•  $y=4x^2+16x+8$  

•  $y=4x^2+16x+16$  

•  $y=16x^2+64x-8$  

•  $y=16x^2+256x+8$  

Classify the model as Exponential GROWTH or DECAY.

y=1200(.85)⁶

• Growth

• Decay

Tags

CCSS.HSF-IF.C.8B