Unit 1-2
Solve: -2 + 5a = 10
a = 12/5
Solve: 4a = -24
a = -6
What is a ratio?
Comparison of two values
What is the origin?
0,0
When two lines intersect at one point there is 1 solution. (T/F)
True
2 1/3 as a decimal
2.333333.......
19-x =30
x = -11
What are the three ways to write a ratio?
a:b, a to b, a/b
What makes something not a function?
repeated x values
What are the different ways to solve systems?
graphing, substitution, elimination
cube root of 64
4
0.4x + 9 = 11
x = 5
28 is 4 percent of what number?
700
y = 4 is what kind of line?
Horizontal line at 4
y=2/3 +2 and y =3x -5 solve for x and y
(3,4)
sqaure root of 115 is between what two whole numbers?
10,11
13/7x + 4/7 = -9/7 solve for x
x = -1
What is a rate?
A ratio that compares two different quantities
Change y = 2x + 5 to standard form
2x -y = 5
solve: y = -8x +14, y =-5x +11
(1,6)
1 1/9 as a decimal
1.11111111111.....
2w-9 >= 8w -3
w <= -1
Trey made 12 out of 30 free throws on the basketball court. If he attempts 75 free throw shots, how many could he expect to make?
x =30
What makes a function linear? ex.) y= 2x +1
the power of the variable is 1
solve:
x-3y =2,
4x + 7y =27
(5,1)