Solving Equations
Solve for y:
y + 7 = 25
y=18
Write an inequality to represent the situation:
In order to watch the movie, participants must be over 20 years old.
p > 20
Is k=7 a solution to the inequality 3k > 25?
NO
Choose the dependent variable:
The number of pages read, p, and time spent reading, t.
The time spent reading is dependent.
Complete the table using the equation y=x+6
Substitute!
Solve for s:
4s = 36
s=9
Write an inequality to represent the situation:
There must be fewer than 20 students in each class.
s < 20
What inequality does this graph show?
x ≥ 5
Choose the dependent variable:
The profit, p, and number of candy bars sold, c.
The profit is dependent.
Write an equation to represent the pattern in the table
a = w - 12
Solve for g:
g + 18.25 = 37.12
g=13.87
I buy at most 3 shirts when I go to the mall. Write an inequality to represent the number of shirts I buy at the mall.
s ≤ 3
What is one solution for the inequality x < 30
Any number below 30 (NOT 30!)
Choose the dependent variable:
Dollars earned, d, and the number of hours spent babysitting, s.
The dollars earned is dependent.
Complete the table using the equation y=¼x
0, 10, 20
Solve for h:
h/7 = 6
h=42
Sarah usually spends at least $50 at the mall. Write an inequality for the amount of money she spends at the mall.
s ≥ 50
Graph x < 5.
Open dot, arrow to the right
Choose the dependent variable:
Surface area of walls in a room, w, and the amount of paint used, p.
The amount of paint used is dependent.
Tell whether or not the equation and table are correctly represented by the graph.
NO!