Factoring
Find the factors of
x2 + 9x + 20
(x+5) (x+4)
Find the slope and y intercept of
y= -3/2x - 14
slope = -3/2 WILL NOT ACCEPT IF THERE IS AN X
Y int = -14
Which equation would have a negative correlation coefficient?
y= 3x -12
y= -2x + 12
The negative equation
5 sodas and 4 pretzels cost 7.75.
What is the cost of each soda?
75 cents
Find the greatest common factor of
3x2 + 9x + 18
GCF = 3
Find the factors of
x2 + 13x + 42
(x + 7) (x+6)
Provide the slope and y intercept
-2y + 4x = 12
y int = -6
Slope = -2/1
A) 1.12 B) -.97
C) .96 D) .04
C
6 hot dogs and 4 bags of popcorn cost 9.50
8 hot dogs and 2 bags of popcorn cost 11.00
Find the cost of each hot dog
hot dog 1.25
Find the greatest common factor
6x3 + 18x2+ 36x
x2 -x -56
Provide the slope for these two points
(-5, 6) (9, 12)
Slope of 6/14 or reduced it becomes 3/7
Using the formula m= y2-y1/x2-x1
Which correlation coefficient shows the strongest relationship?
A) .96 B) .973
C) 1.12 D) -.979
D
What kind of symbols provide a solid line? What kind of symbols provide a dotted line? Can a solution be on a dotted line? Explain.
1) Less than/Greater than or equal to
2) Less than/Greater than
3) No b/c dotted is NOT equal to
FOIL or BOX method
(x -6) (x + 4)
x2 -2x -24
x2 - 14x + 49
(x-7) (x-7)
Provide a solution between the two equations
y= 3x - 9 y= 2x -4
x= 5
y= 6
Solve by setting both equations = to each other and then after finding x, substitute it in either equation to solve for y!
Provide a linear regression equation for the following data.
Test scores: 65, 95, 62, 98, 86, 76, 74
Time studying (min): 0, 60, 5, 70, 75, 30, 45
Go to stat, calc, choice 4(lin reg) and provide the equation
Graph the following and label the solution set
y > -4x + 6
y< 3x -4
They should have a dotted line starting at positive 6 with a slope of -4/1 shaded ABOVE or where the Y values become greater.
They should have a dotted line starting at -4 with a slope of 3/1 shaded BELOW or where the y values are lesser.
FOIL or Box Method
(x -9) (x-4)
x2- 13x + 36
x2 - 19x + 60
(x-15) (x-4)
Juan has a cellular phone that costs $12.95 per month plus 25¢ per minute for each call. Tiffany has a cellular phone that costs $14.95 per month plus 15¢ per minute for each call. For what number of minutes do the two plans cost the same?
at 20 minutes
y= 12.95+.25x
y= 14.95+.15x
Table or solve.
Provide a linear regression equation. Explain what the equation means in the context of the data.
Time spent Exercising (min)
30, 115, 5, 300, 450, 40
Weight Loss (pounds): 5, 15, 0, 45, 65, 11
The context of the data means, the more you exercise the more weight you will lose.
A high school club is putting on a show. There is a maximum of 800 tickets for the show. The costs of tickets are $6 pre-sale and $9 on the day of the show. To meet the expenses of the show, the club must sell at least $5,000 worth of tickets. Write a system of inequalities that represent this situation & graph finding a solution (may use graph paper).
x + y is less than or equal to 800
6x + 9y is greater than or equal to $5,000
Being that x is before and y is that day (can change )
FOIL or Box Method
(x-6)2 (x+4)
They should end up with two sets of (x-6)(x-6) which makes x2-12x +36 then they have to multiply that by (x+4) which will give them x3 -8x2-12x+144
*This is a 500 point question, no easy ones =)