4/21 Equations and Inequalities

Equations and Inequalities

Expressions

Expressions do not have an equal Sign.

Pay attention to the key words for the operation.

Multiple Choice

Translate:

4 more than three times the amount of c candy bars

• 3c + 4

• 3c - 4

• 4c + 3

• 4c - 3

Multiple Choice

Perry has 17 fewer baseball cards than Pete.

If b represents the number of cards Pete has, write an expression for how many baseball cards Perry has.

• b + 17

• b -17

• 17 - b

• 17 + b

Multiple Choice

Write the phrase as an expression:

twice a number plus six

• 2x + 6

• 2x - 6

• 2x / 6

• 2x (6)

Multiple Choice

Write the phrase as an expression:

twenty times a number

• 20 + x

• x - 20

• 20x

• x/20

Multiple Choice

Write the phrase as an expression:

the sum of a number and five

• x + 5

• x - 5

• 5x

• x/5

Multiple Choice

What is the correct written form for the numerical expression?

• Subtract twelve from the product of six and four

• Six times the difference of twelve and four

• Six times four minus twelve

• Subtract the product of six and four from twelve

Writing Equations

https://www.youtube.com/watch?v=I1JTiWmPHFM

Multiple Choice

A cell phone company charges $3.00 to make a phone call plus $0.15 for each minute for each minute you talk. Which equation would you use to determine the total cost, c, of a phone call that is m number of minutes long?

• c = 3.00 - 0.15m
• c = 0.15 + 3.00m
• 3.00 = c + 0.15
• c = 3.00 + 0.15m

Multiple Choice

Which choice models this situation?

Robyn had some video games, then bought 4 more. Now she has a total of 10 games.

• v - 4 = 10

• v + 4 = 10

• 10/4 = v

• 4v = 10

Multiple Choice

A number times two is eight.

• 3x = 8

• 3 + x = 8

• 2x = 8

• 2 + x = 8

Multiple Choice

5. After dropping 5ºF, the temperature was 37ºF. Which choice models this situation?

• d - 37 = 5

• d + 5 = 37

• d - 5 = 37

• d + 37 = 5

Multiple Choice

2. Cheryl gets paid $8 per hour for her job at the record store. She made a total of $96 last week. Which equation models this situation?

• 96h = 8

• h/96 = 8

• 8h = 96

• h/8 = 96

Inequality Symbols and Words

Multiple Choice

The inequality a < 10 represents the ages that qualify for a child ticket at the movie theater. Which children in the Rodgers' family qualify for a child ticket?

• Chris, Megan, Piper

• Piper only

• Chris and Megan

• Piper and Mark

Multiple Choice

The inequality h ≥ 48 represents the minimum height necessary to ride a certain roller coaster. Who can ride this roller coaster?

• Sara only

• Anna only

• Anna and Sara

• Anna, Patrick and Miguel

Multiple Choice

You have to be 18 or older to buy a Powerball lottery ticket. Which inequality represents this situation?

• p < 18

• p > 18

• p ≤ 18

• p ≥ 18

Multiple Choice

Mike has at least $250 in his savings account. Which inequality represents this situation?

• m < 250

• m > 250

• m ≤ 250

• m ≥ 250

Multiple Choice

Pick the correct letter for:
6 > x

• A
• B
• C
• D

Multiple Choice

When graphing an inequality, you use an open dot when you use which symbol?

• <, >
• ≤, ≥ 
• ≤, <
• ≥, >

Multiple Choice

Match the graph with its inequality.

• a > 11
• a < 11
• a ≥ 11
• a ≤ 11

Multiple Choice

When you graph an inequality, you use a closed dot when you use which symbols?

• ≤, ≥ 
• <, >
• ≤, <
• ≥, >

Multiple Choice

What inequality does the number line graph represent?

• x > 5
• x < −5
• x ≥ 5
• x ≥ −5

Solving Equations and Inequalities

Multiple Choice

Solve for x:

• x = 20

• x = 7

• x = 10

• x = 3

Multiple Choice

What is the solution of 13 = t + 7

• 5

• 6

• 7

• 20

Multiple Choice

What is the solution of 25 + k = 18

• 18

• -7

• 43

• 7

Multiple Choice

3y = -15

• -5

• 5

• -3

• 3

Multiple Choice

12x = 144

• x = 12

• x = 4

• x = 2

• x = 132

Multiple Choice

y + 8 = 20

• 10

• 11

• 12

• 13

Multiple Choice

• h > 10

• h > -10

• h < 10

• h < -10

Multiple Choice

10 ≥ x - 3

• x ≤ 13

• x ≥ 13

• x ≤ 7

• x ≥ 7

Multiple Choice

Solve the inequality.

x + 5 ≤ 13

• x ≥ 8

• x ≥ 18

• x ≤ 8

• x ≤ 18