Chapter 1
Write a word phrase for the following: the product of 9 and a number x minus 12.
y=9x-12
Solve 2k - 7 = -19
k = -6
solve and graph the following inequality.
-6t > 18
t < -3. show graph
Find slope : (2,2) ; (3,1)
slope = m = -1
What is the correct order of operations when solving ?
Addition ; Subtraction
Simplify the expression : (24 - 6)2
100
Solve: 3a + 2 - 5a = -14
3x + 5 < 2x - 8
x < -13
y = 3 when x = 9. What is the direct variation? What is the value of y when x = 7.
y= 1/3x ; 7/3
what does absolute value mean?
distance away from 0 on a number line.
(3c2 - 3d)2 - 21 ; c= 3 d=5
123
identity / all solutions
-1 < a - 3 < 2
2 < a < 5
write an equation in slope- intercept form given the points. (-3,4) , (1,4).
y = 4
what is the correct way to figure out slope when looking at a graph?
rise/ run = m =
y-int = b =
simplify the expression: (6y - 1) 1/4
3/2y - 1/4
new amount: 135
What is the percentage change? Increase or Decrease?
10% decrease
| 2x - 7 | - 1 > 0
x < 3 or x > 4
write an equation in slope intercept form given the two points. (3,-2) ; (6,1)
y = x - 5
a rate with a denominator of 1 unit is called a _____?
unit rate
Tell whether the given ordered pair is a solution of the equation. 10 - 5x = y ; (-4,10)
NO
In a bird sanctuary; 30% of the birds are hummingbirds. If there are 350 birds in the sanctuary, how many are hummingbirds?
105 hummingbirds
The ideal length of a certain nail is 20 mm. The actual length can vary from the ideal length by .04 mm. Write an inequality to represent the range of the length for the nail .
19.6 < x < 20.4
m=2
b=-5
what makes a number irrational?
it cannot be written as a fraction.