EOC Review

Write the equation for the line in slope-intercept form.

• y= -1x+3
• y= 4x+3
• y=1/4x+3
• y= -4x+3

^{What is the solution?} 

• 1
• -2
• (1, 2)
• (1, -1)

Dennis mowed his next door neighbor’s lawn for a handful of dimes and nickels, 80 coins in all.  Upon completing the job he counted out the coins and it came to $6.60.  Which system of equations could be used to find the exact number of dimes and nickels? 

• d + n = 6.60
  .10d + .05n = 80
• d + n = 80
  d + n = 6.60
• d + n = 80
  .10d + .05n = 6.60
• d + n = 80
  .05d + .10n = 6.60

What is the slope of a line parallel to the line whose equation is:  -2x + y = - 7?

*Remember to convert to y = mx + b

*Parallel lines have the same slope

• -2
• 1/2
• -1/2
• 2

Multiply: (3x – 1)(x + 5) 

*use box or FOIL method

• 3x² + 4x + 5
• 3x² + 4x - 5
• 3x² + 14x + 5
• 3x² + 14x - 5

What are the green dots called?

• axis of symmetry
• vertex
• parabola
• roots or x-intercepts

What is the equation for this parabola in factored form?

*Remember to set each factor equal to 0, to find the solutions.

• y=(x+2)(x-1)
• y=(x-2)(x+1)
• y=(x-2)(x-1)
• y=(x+2)(x+1)

What are the factors AND solutions of x² + 2x – 3 = 0

• (x - 2)(x + 1); x=2, x=-1
• (x + 1)(x - 3); x=-1, x=3
• (x + 2)(x - 1); x=-2, x=1
• (x - 1)(x + 3); x=1, x=-3

The mice population is 25,000 and is decreasing by 20% each year. What will be the mice population after 3 years?

y = a(1-r) ^x

• 12,800

• 15,777

• 102, 475

• 2,500

Write and exponential function for the following problem: Mrs. Madison starts the year off with 100 pencils. Each week, half of the pencils disappear. How many would be left after x weeks?