Unit 5 Review

Solve for 'x' in the following equation: 10 = 3x - 2

Answer explanation

Start by adding 2 on both sides of the equal sign. Then you will have 12 = 3x. Next, you will divide by 3 on both sides of the equal sign. 12 divided by 3 is equal to 4

Ms. Piner asks her class which x-value satisfies the equation 4x = 24. Which student was correct?

• Ian is correct because 4(20) = 24

• Stella is correct because 4(6) = 24

• Xiao is correct because 4(5) = 24

• Zoe is correct because 4(16) = 24

Solve for 'x' in the following equation: 6(2x + 12) = 144

What is the solution to the equation shown? y + 0.4 = 5.34

Three hermit crabs at a pet store cost $21.75. If each hermit crab, h, costs the same amount, which equation can be used to find the cost per hermit crab correctly?

• h + 3 = 21.75

• h + 21.75 = 3

• 3h = 21.75

• 21.75h = 3

Answer explanation

The total cost is $21.75, so the equation will be equal to 21.75. If there are 3 crabs and they are all the same price you can use multiplication to find the total. 3 crabs times the price (h) is equal to 21.75

Tommy wants to buy a new bike. Tommy has $119, which is $35 less than the needs. Which equation or inequality represents the cost of the bike (b)?

• 119 - 35 = b

• 119 + 35 = b

• 119 > 35b

• 119 < b + 35

Tonya earns $7.50 per hour at her after school job. How many hours must Tonya work to earn $120.00

Answer explanation

There are 2 ways you can solve this problem. The first way is to divide (per is your keyword which means to divide). You can do 120/7.50. The second way is to multiply 7.50 by each answer choice to see which would give you $120.

Clifford has 30 cans of soda. He and his friends drank some of them and now only have 11 left. Which equation represents the situation, and how many cans (x) did Clifford and his friends drink?

• 30 - x = 11; 41 cans

• 30 - x = 11; 19 cans

• 30 + x = 11; 41 cans

• 30 + x = 11; 19 cans

By company policy, the plumber must work fewer than 40 hours. Which inequality best describes this situation if h represents the hours the plumber works in a week?

• h > 40

• h > 39

• h < 40

• h < 39

Jamar correctly graphs the inequality: x < 4

Which graph is correct?

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Answer explanation

Less Than, Open circle, left arrow