-STAT, then hit 1
-enter x values in L1 and y values in L2
-hit y= and the up arrow to highlight plot 1
-adjust window if needed
100
Sara has a coin collection consisting of nickels and dimes. She has 28 coins worth $2.25. How many of each does Sara have?
Nickels= 11
dimes= 17
100
Add the following matrices.
[2 4] [8 6]
[ 9 3] + [7 2]
[10 10]
[16 5]
100
Solve the equation.
2.1x+0.7= 2.8
x=1
100
Explain the steps to getting the inverse of a matrix
Multiply the matrix, with a and d switched and b and c opposite, by 1/ad-bc
200
In the calculator, what does r represent?
r is the correlation coefficient
It describes how strong the correlation of the data is
200
When Mike baby sat for 8 hours and worked at a restaurant for 3 hours he made a total of $58. When he babysat for 2 hours and worked at a restaurant for 5 hours he made $40. How much does Mike get paid for each type of work?
Babysitting: $5
Restaurant: $6
200
Describe the following matrix.
a b c
a 0 0 0
b 0 0 0
c 1 1 1
3 random points
200
Solve the system
8x-y=64
3x-9y=-45
x=9
y=8
200
The ratio of cats to dogs in petco is 4 to 3, there are 14 animals in all. Find the number of cats and dogs
8 cats and 6 dogs
300
Describe how to make a trend line.
-enter data and plot points
- STAT, CALC, #4 and then enter
-next y=, #5, EQ and #1
-highlight plot 1
-adjust window size
300
You want to get an oil change for our car at Janelle’s auto clinic, where you work. You get a 20% employee discount. Your boss, Kiefer, allows you to also use a $4 coupon. Write the composite function to calculate the employee discount first and then subtract the coupon. Solve this function if the cost is $24.
g(f(x))
price: $15.20
300
What are the dimensions of the product of the following 2 matrices multiplied?
[3 4 9] [4 1]
[2 1 7] [3 3]
[8 6 4] [2 9]
3 x 2
300
Solve the equation.
2x-7+3x= 5+5x
Invalid
300
Suppose you have six employees to schedule into six different time slots. From how many schedules can you choose?
720 (6P6)…AKA: six Pick six
400
Describe how to make a prediction when x is known.
-2nd TRACE, #1
-Type in the value of x and hit enter
-the x and y values should be at the bottom of the screen
400
A landscaper is building a garden with one edge up against a house. She has a total of 150 ft of fence and plans to build the garden in the shape of a rectangle. Find the dimensions that enclose the maximum area.
Solve the system.
x= y- 3/2z+10
x= y-2z+13
-3x+y+2z=7
z=6
y=1
x= 2
400
what is a mapping diagram??
the two ovals that are connected by lines. At the end of the lines there are corresponding x and y values of coordinates.
500
Describe how to make a prediction when y is known.
-y=, enter y value in Y2
-graph this
-2nd TRACe, #5
-hit enter, enter, enter
-x and y values should be at the bottom of the screen
500
You own a bicycle manufacturing company that makes two kinds of bikes, mountain and road bikes. A mountain bike takes 6 hours to fabricate and 1 hour to finish. A road bike takes 4 hours to fabricate and 1 hour to finish. The fabricating department has 108 hours of labor available. The finishing department has 24 hours available. Your company makes a profit of $40 on each mountain bike and $30 on each road bike. How many bikes of each type should you make to maximize the profit?
6 mountain bikes
18 road bikes
500
Solve the system using a matrix equation.
y=x+2
y=-2x-1
x=-1
y=1
500
You have 300 ft of fencing to enclose a pasture on three sides, with a stream on the fourth side. You want the field to be at least 30 ft. wide on each end, which would leave 240 ft. for the length. The area would then be 7200 ft (squared). Other possibilities would be 40 ft by 220 ft (8800 ft squared) or 50 ft by 200 ft (10000 ft squared) Find a good model relating he width (w) to the area (A). Is the model linear or quadratic?
a = -2w2 + 300w
Quadratic
500
Pop verses!!! Both teams will race to answer this question and the winner will get the points:
F (x)= 3x-8 solve: f(y/6)