Inverse Operations
What is the definition of inverse operations?
Operations that undo eachother.
What is the value of x in the following equation:
x + 7 = 5
a. x = 2
b. x = 12
c. x = -2
d. x = -3
c. x = -2
Solve the following inequality
15 > x - 5
x < 20
How would you graph the solution to x + 3 > 6 on a number line?
a. open circle to the left at 3 on the number line
b. closed circle to the left at 3 on the number line
c. open circle to the right at 3 on the number line
d. closed circle to the right at 3 on the number line
c. open circle to the right on the number line
How many inequality symbols are there?
4
What is the inverse operation of addition?
Subtraction
After 4 new students joined a class, the class had 32 students. Which equation can be used to find n, the number of students in the class before the 4 new students joined?
a. n/4 = 32
b. n - 4 = 32
c. 4n = 32
d. n + 4 = 32
d. n + 4 = 32
Kelli walks no more than 25 dogs on Mondays. Ms. Lincoln has 5 dogs that Kelli walks. The inequality shown can be used to find x, the number of dogs Kelli can walk on Monday in addition to Ms. Lincoln’s dogs.
x + 5 < 25
Which inequality represents all possible values of x?
a. x > 20
b. x < 20
c. x > 30
d. x < 30
b. x < 20
Which two inequality symbols have open circles?
Greater than and Less than
What is the name of this inequality symbol?
>
Greater than
What is the inverse operation of subtraction?
Addition
The perimeter of a rectangle is 135 inches. The combined length of three of the sides is 117.5 inches. What is the length of the fourth side of the rectangle?
a. 17. 5 inches
b. 50 inches
c. 100 inches
d. 252.5 inches
a. 17.5 inches
Elizabeth has a maximum of $50 to spend at the zoo. An entrance ticket costs $7. She can spend x dollars at the gift shop. Which inequality can be used to find the possible values for x?
a. x + 7 < 50
b. x + 7 < 50
c. x + 7 > 50
d. x + 7 > 50
a. x + 7 < 50
Which two inequality symbols have closed cirlces?
Greater than or equal to and Less than or equal to
What is the name of this inequality symbol?
<
Less than
What is the inverse operation to multiplication?
Division
Elise buys 5 boxes of cereal and spends a total of $19.25. this situation can be represented using the equation 5x = 19.25. What is the value of x, the cost in dollars of one box of cereal?
$3.85 for one box of cereal.
Which inequality is true if x = 13?
a. x + 8 < 4
b. x - 8 > 4
c. 8x < 4
d. -4x > 18
b. x - 8 > 4
Which two inequality symbols move left on the number line?
Less than and Less than or equal to
What is the name of this inequality symbol?
>
Greater than or equal to
What is the inverse operation to division?
Multiplication
Which of the following answer choices could be represented by the equation
45 + x = 150?
A.The local animal shelter has 45 animals. They get 150 more animals, for a new total of x animals.
B. The local animal shelter had a total of 45 animals. After x animals were adopted, 150 animals were left.
C. The local animal shelter has 45 animals. After x new animals arrive, the shelter will have a total of 150 animals.
D. The local animal shelter had x animals. After 45 animals were adopted, 150 animals were left.
C. The local animal shelter has 45 animals. After x new animals arrive, the shelter will have a total of 150 animals.
Which of the following answer choices could be represented by the inequality
10x ≤ 30?
A.A pizza maker needs at least 30 pepperonis for a large order. He opens x bags, each containing 10 pepperonis.
B. A large pizza costs $10. A group buys x pizzas and spends exactly $30.
C. A chef prepares 10 pizzas, each with x slices, for a total of more than 30 slices.
D. You have $30 to spend on x personal pizzas that each cost $10.
D. You have $30 to spend on x personal pizzas that each cost $10.
Which two inequality symbols move to the right on the number line?
Greater than and Greater than or equal to
What is the name of this inequality symbol?
<
Less than or equal to