Solve
3x-25=9x+5
x=-5
Find the domain of f(x)=3x-22
(-inf,inf)
Find the slope and y-intercept of y=x-42
slope = 1
y-intercept = -42
Simplify as much as possible
14x-9x
5x
Is the following true or false:
-3<-5
False!
-3 is less negative than -5 and therefore greater.
49=x2
x=-7,7
Find the range of f(x)=3x-22
(-inf,inf)
Give a linear equation that describes a line with slope of -3 and y-intercept of 2
y=-3x+2
Simplify as much as possible
x5/x3
x2
Is the following true or false:
y-4=3x+2 is a linear equation
True!
This function can be rearranged into slope intercept form to look like y=3x-2.
3x-12=-(8x-2)+8
x=2
Find the domain of f(x)=1/x
(-inf,0)U(0,inf)
x≠0
Find the slope of a line passing through the points (2,3) and (-4,6)
slope = -1/2
Simplify as much as possible
(x2)(x-12)
x-10 or 1/x10
Is the following true or false:
the point (2,3) is a solution to y-4=3x+2
False!
(3)-4 is not equal to 3(2)+2 because -1 is not 8.
2x3+6=-10
x=-2
Find the range of y=1/x
(-inf,0)U(0,inf)
y≠0
Give the equation of a line that is parallel to y=2x-9 and passes through the point (3,1)
y=2(x-3)+1
y=2x-5
Expand and simplify as much as possible:
4(x-2)2
4x2-16x+16
Is the following true or false:
the point (2,3) is a solution to 3x-5>2y
False!
3(2)-5 is less than 2(3) because 1<6.
If f(x)=3x2+8 then solve f(x)=20
x=-2,2
Find the domain of
f(x)=(3x)/(sqrt(4-x))
(-inf,4)
x<4
If a taxi cab charges you $7 for a ride plus $.25 for every mile driven, give a linear equation that will describe the cost in dollars for driving x miles.
cost = f(x)=.25x+7
Simplify as much as possible:
(144 x12 / 12 x2+9) 0
1
Is the following true or false:
The point (2,1) is the solution to the system of equations
y=2x-3 and y=-x+3
(solutions are where the graphs intersect)
True!
2x-3=-x+3
x=2