Proportions
x/4=3/2
x=6
-2(3x-5)=70
x=-6
Find the slope
(2,-4) and (3, -2)
m=2
What is the domain and range?
Domain is the set of x values and range is the set of y values
2 pizzas feed 5 people. How many pizzas feed 15 people?
6 pizzas
2/5=5/x
x=25/2
-4(3-2x)=3(5x+3)
x=-3
Find the slope
(-3,4) and (2,-5)
-9/5
What shape does the parent function x2 look like?
U shape
The ratio of dogs to cats in a pet store is 5:3. If there are 25 dogs, how many cats are there?
15 cats
-3/x=2/10
x=-15
-5(4x-3)+3=6(3-3x)-2x
infinite solutions
Write the equation in slope intercept form
(3, -2) , slope=2/3
y=2/3x-4
Does a circle pass the vertical line test?
no
You get paid $55 for working for 4 hours. How much do you get paid per hour?
$13.75
(x+1)/2=3/4
x=1/2
-5(7x+10)+20=3(-6x-10)
x=0
Write the equation of the line perpendicular to y=2x-4 through the point (6, -2)
y=-1/2x+1
Evaluate f(2)
f(x)=-2abs(2x-6)
f(2)=-4
3.21 gallons
(2x+2)/5=(x-3)/5
x=-5
7(4-2x)+4x=3(-3x+1)-x
no solutions
Write the equation of the line through
(-3, 5) and (1, 3)
y=-1/2x+7/2
Evaluate at f(-1)
f(x)=-x^2+2x-3
f(-1)=-6
It takes one and a half hours to bike 25 miles. How many miles can you bike in 50 minutes?
13.89 miles