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VOCABULARY
solve and graph
substitution
elimination
word problems
100
The rise over run of a line.
What is slope?
100
2(-4-5x)< or equal to 2(-5x-3)
what is x<1.5? -8-10
100
5x+y=-4 y=x+2
What is x=-1 y=1 5x(x+2)=-4 -2 -2 6x=-6 x=-1 Plug in x y=-1+2 and y=1
100
3x-2y+z=9 x-y+4z=10 2x+3y-z=53
What is z=-2y+-26
100
The Nile River is 394 kilometers longer than the Amazon River. The two rivers have a total length of 12, 986 kilometers. How long is each river.
What is the Nile is is 6690km long and the Amazon River is 6296km long x+ 394 = y x + y = 12986 x + (x+394) = 12986 2x + 394 = 12986 2x = 12592 x = 6296 6296 +394 = y 6690 = y
200
Each of its input values matches to exactly one output value.
What is function?
200
5(-9+3y)=30
What is y=5 -45+15y=30 +45 +45 15y=75 y=5
200
x-2y=-10 -x+2y=3
What is y=6 and x=2
200
A teacher prepares 3 different tests. The teacher uses three types of questions which are each worth a certain number of points. The table shows the number of questions or each type on each three tests. Find the number of points each type of question is worth.
What is type c=1 type b=2 type a=4
200
Dan paid a toal of $25.80 last month for his international calls. He makes international calls only to England. Dan pays $0.06 per minute in addition to $10.98 fixed monthly payment. How many minutes of international calls did dan make last month?
What is 247 minutes?
300
Know as r, a measure of the exactness of the straight-line or linear relationship between two variables.
What is correlation coefficient?
300
-2(j+3)-3(j-4)
What is -5j+6?
300
x+3y=2 -x+2y=3
What is x=-1 and y=1
300
2x+y=12 -5x - y= -33
What is x=7 , y= -2
300
A cashier has 20 bills, all of which are $10 or $20 bills. The total value of the money is $220. How many of each type does the cashier have?
What is 2 $20 bills and 18 $10 bills x + y = 20 10x+20y = 220 -10x -10y = -200 10x + 20y = 220 10y = 20 y = 2 x+ 2 = 20 x = 18
400
The act of moving or lessining a line.
What is horizontal compression?
400
12a-4=7+a
What is 1
400
y= x-2 x+5y=20
What is x=5
400
y=x+7 x+y=17
What is x=5, y=12
400
One hundred theater tickets were sold. Orchestra seats cost $75 and balcony seats cost $40. The total receipts from ticket sales were $5, 400. How many of each type were sold?
What is 40 orchestra seats and 60 balcony seats x + y = 100 75x + 40y = 5400 -40x -40y = -4000 75x +40y = 5400 35x = 1400 x = 40 40 + y = 100 y = 60
500
When variables are replaced by expressions that contain their values in terms of another set of variables.
What is transformation?
500
6x+8y=24
What is y=3-.54x
500
x+y=5 2x+5y=16
What is y=2 , x=3
500
y=3x+5 x=-3y-5
What is y=-1 x=-2
500
After the first three miles, the cost of a taxi ride is a linear function of the trip length. If a five miles ride costs 5 dollars and a 10 miles ride costs 8.75 dollars how much does a 16 mile ride cost? (USE y=0.75+1.25)
What is What is 16 mile ride= $13.25