Equations
The price of a 15-oz. bag of chips is $3.59. An 8.5-oz. bag of the same chips is $2.09. Which is the better buy?
15-oz. bag of chips
Range Answer Possibilities: The most negative (or lowest) y value to the most positive (highest) y value. OR All y values that can be outputted by the function.
Calculate the slope of the line that passes through (6,2) and (9,4).
2/3
Solve the system by graphing.
y=-6x+2
y=-x-3
(1,-4)
Factor.
ax^2-16a
a(x-4)(x+4)
Solve.
7=(x-3)/6
x=45
How do you know if a mapping diagram is a function or a relation?
Only a function is each input has only one output. Otherwise it is a relation.
Write the information in point-slope form.
Passes through (8,-6) with a slope of 1/2
y+6=1/2(x-8)
Solve the system by either substitution or elimination.
-7x+7y=7
x+3y=-17
(-5,-4)
Factor.
x^2-2x-35
The sum of three consecutive odd integers is 135. What is the smallest of the three numbers?
43
Given the line y<=3/5x-5, will you shade above or below the line?
Graph the solutions to the system of inequalities.
y>-4x-1
y<=-x+2
Bottom right corner
Factor.
3x^2-15x-42
3(x+2)(x-7)
Sally bought a soft drink for $3 and 9 candy bars. She spent a total of $48. How much did each candy bar cost?
$5
Let f(x)=4x-7. Find 2f(-3).
-38
3x+4y=8
y=-3/4x+2
-2x+3y=3
3x-7y=-2
(-3,-1)
2x^2-50
2(x-5)(x+5)
Sarah is planning a trip to France. It takes 0.92 Euros to equal 1 US dollar. If she exchanged her US dollars for Euros and received 736 Euros, how many money did she start with?
How do you know if a graph is a function?
Passes the vertical line test
y-2=2/3(x-6)
y=2/3x-2
Brenda's school is selling tickets to a fall play. On the first day of ticket sales, the school sold 3 senior citizen tickets and 9 child tickets for a total of $75. The school took in $67 on the second day by selling 8 senior citizen tickets and 5 child tickets. What is the price of each ticket?
Senior citizen: $4
Child: $7
Factor.
2x^4+6x^3-18x^2-54x
2x(x-3)(x+3)(x-3)