Expressions
If G = 7 and B = -2 find the value of
7 + G + B =
7 + 7 + -2 = 12
Tom has saved g dollars for a $518 PS4. Write an expression for the amount of money he still needs to buy the PS4. a)g – 518 b)518 – g c)518 + g d)518 ÷ g
518 - g You are subtracting g from the amount of PS4, which is 518.
A. If the inequality is < or >, do you use an open circle or closed circle?
B. When do you flip the inequality sign?
A. OPEN CIRCLE
B. When you multiply or divide the inequality by a negative number
If the mouth of the inequality faces the variable, does the graph go to the right or left?
EX. 10,000 < y
RIGHT
How do you know if a relation is a function.
What is the definition of a function?
For every input, there is only ONE output.
If G = 7 and B = -2 find the value of
2G - B =
14 - -2 = 16
12 - t = 2
t = 10
Graph the inequality. y ≤ 3
<--------------------3 with a closed circle at 3
When do you change the direction of the inequality sign?
You change the direction of the inequality sign when you MULTIPLY or DIVIDE a NEGATIVE NUMBER on BOTH SIDES.
Use the examples provided to you to determine which examples are functions.
Answer
Simplify the expression
-4(2B - 4)
-8B + 16
Solve the equation. 8 - 5y = 53
y = -9
Solve and graph the inequality. n - 11 ≥ 12
n ≥ 23 Graph
Closed circle at 23------------------------>
Solve and graph the inequality. -3x < 18
x > -6 <--O==> Sign switches because you are dividing -3 on both sides.
Using the graph provided find F(4) and f(8)
Explains what this means
Water Tank Volume Graph
Simplify the expression
-5(2Y + 8) - 7Y
-17A - 40
Solve the equation. -5(1 - 6x) = 25
x = 1
Solve the solutions of the inequality. 10 - 3t > -11
t < 7 Sign switches because you are dividing -1 on both sides.
Solve the solutions of the inequality. 2x + 5 < 29
x < 12
Find t when f(t) = 40
Explains what this means
Use the water tank graph
It cost $70 to rent a plus 75 cents per mile. Write an expression to represent the total cost, C for m number of miles.
C = _____________
C = 70 + .75m
Solve the equation. 2c – 10 = c + 8
c = 18
To solve the equation, the variable must be isolated. What is the step needed to isolate the variable in this equation? 2 + 3k > 4 + 1k
Subtract 3k on both sides OR subtract 1k on both sides.
Your parents gave you a maximum of $25 to spend at a carnival. Your food costs $12 and each game costs $1.25 each.
Write an inequalty for this situation. Use the variable g for number of games.
12 + 1.25g < 25
Provide an example of a function in real life. Use the mapping diagram.
Answer Varies