March 18, 2016
Lesson 3.4
Getting the Calculation Right
Expressions and Orders of Operations
PEMDAS
Focus Question: When an equation relating two variables
involves two or more operations, how do you use the equation to
find values of the dependent variable from given values of the
independent variable?
p = 50 + 10n
Theo wants to find the admission price for an
Ocean Bike Tours group with 17 members.
too
??
l a rg e
Which
is
correct?
more reasonable??
PEMDAS
March 18, 2016
7 + (6 * 4 - 9) / 3
March 18, 2016
March 18, 2016
Let's put it all together...
Two lemonade stands set up in a neighborhood.
Lana's Lemonades is starting with a $15 donation from her parents.
Their goal is to raise at least $8 per day.
Lemonades R Us is on their first day of sales. Their goal is to earn
$12 per day.
Create a table showing the earnings for each stand for 10 days.
Write an equation for each lemonade stand to show how much money
they would earn for any number of days.
Lana's Lemonades:
Lemonades R Us:
Graph each equation on the coordinate plane.
March 18, 2016
During the 10 days, will the lemonade stands have the same
amount of income?
How long will it take each stand to make $150?