Chapter 7 – Writing and Solving One-Step Inequalities Lesson: 4, Question 1. To graph inequalities, locate the number opposite the variable of the inequality on a number line. During a sale, the price of a sweater was changed from $20 to$16. For example: As a salesperson, you are paid $50 per week plus$3 per sale. What is the solution of the inequality? Divide: −36 ÷ 6. Question 6. −4b + 9 ≤ −7 48 + 3 = 45 1 6x 4 … Given, Multiply 2 on both sides If the inequality is either a > or a <, use an open dot, indicating that the number is not a solution. Each time he uses the toll road, $1.25 is deducted from the account. Identify what your variable represents. Divide both sides by 1.5 Interpret the Answer Which inequality represents how many times Ramón can use the toll road without having to add value to the toll pass? Answer: a. x < -2 8x + 2 The number opposite the variable is 3, we look for this in the number line. Ramón’s toll pass account has a value of$32. First, solve the inequality: $4.51 Since she started at 20 feet below the ocean surface, she started at -20 feet. 2s + 3 > 15 Type below: 0 < n < 1: In case, n is a fraction smaller than 1 such as $$\frac{1}{4}$$. Solve the inequality first: Answer: 30x + 600 > 1,500 From here, shade the line going to the left if the inequality is either ≤ or < and shade the line going to the right if the inequality is either ≥ or >. ___________. ___________, Answer: You have a$20 gift card and $130 in cash. ______, Explanation: 2s + 5 ≥ 49 How can you recognize whether a real-world situation should be represented by an equation or an inequality? Subtract 80 on both sides 2x + 5 – 5 ≤ 1 – 5 d. −4n + 11 > −9. Type below: Multiple step inequalities inequalities worksheets. If the inequality is either a ≤ or a ≥, we use a closed dot, meaning the number is a solution as well. Also, if you are on a PC, hold down your alt key, type 242 on the number pad (with num lock on), then let go of the alt. __________. CCSS: 7.EE.B.3. Options: 5 + 2 8 + 2 becomes 7 10. This version includes fractions and decimals. c. The physicist has to repeat the experiment if the metal gets cooler than -80 °C. Its graph would like the one below: Question 1. The inequality is then -4t ≥ -80. To graph inequalities, locate the number opposite the variable of the inequality on a number line. 20% d. 30x + 600 ≤ 1,500. Type below: c. 16x Since the inequality is ≤, we use a closed dot and shade the line going to the left. What inequality can you write to find the average scores that she can get on her next three tests to meet this goal? Since the inequality is ≥, we use a closed dot and shade the line going to the right. -3t + 9 – 9 ≥ −21 – 9 3 – 3 + x < 7 – 3 We have step-by-step solutions for your textbooks written by Bartleby experts! If the inequality is either a > or a <, use an open dot, indicating that the number is not a solution. Since the inequality is >, we use a hollow dot and shade the line going to the right. Answer: Multiplying both sides of m < 0 by -1 gives -m > 0 since you must switch the inequality sign when you multiply by a negative number. From here, shade the line going to the left if the inequality is either ≤ or < and shade the line going to the right if the inequality is either ≥ or >. Example 3 Graph the solution for the linear inequality 2x - y ≥ 4. The length of the rectangle is 25 inches. In golf, the lower your score, the better. c. -6 x = 4 So far, 668 cans have been collected. Answer: What If? The number opposite to the variable is 140, we look for this in the number line. Let x represent the average amount each member raises. Dividing both sides of −6 ≤ −3x by -3 gives 2 ≥ x. Since the inequality is ≥, we use a closed dot and shade the line going to the right. w1J. Its graph would like the one below: Question 3. We are given that the rate of change is -4°C per hour so the final temperature is -4 times the number of hours. An online tutoring service charges$30 per hour. Explanation: Explanation: Divide both sides by 15. ___________. x – 35 + 35 > 15 + 35 1. c ≥ −c + 4 2. Substituting x = 4, we can see that: She will have saved $102 in total if she earns$18 each day so she will have enough money. 0.85x + 1.65 = 20 If the inequality is either a ≤ or a ≥, we use a closed dot, meaning the number is a solution as well. Since the inequality is <, we use a hollow dot and shade the line going to the left. If the inequality is either a > or a <, use an open dot, indicating that the number is not a solution. First, solve the inequality: a. -4.8 ≥ −0.3a The first step is to translate the words into an algebraic expression. 193 + y ≥ 201 8 > m Problems that require the use of inequalities have phrases in them such as “at least”, “no more”, “at most” and “no less than”. −1 ≥ −8; Multiply both sides by -2 4 $$\frac{1}{2}$$($$\frac{2}{3}$$) = $$\frac{9}{2}$$ × $$\frac{2}{3}$$ = 3 d. 0.85x − 1.65 = 20. Solve the inequality first: y = 30 + 25(4) C. y â!2 or. 4x + 30 ≥ 90, Question 1. Which of the following is the solution set of !3 $2. x # 7 & 13? −4b + 9 ≤ −7 y ≥ 4 $$\frac{a}{-8}$$ + 15 > 23 Since 9991 is 9 less than 10000, x + 9991 > 10,000 ha the solution x > 9, Question 28. n > 1: If n is a value greater than 1, such as $$\frac{3}{2}$$, then the reciprocal is smaller than 1, such as 1/$$\frac{3}{2}$$ = $$\frac{2}{3}$$. 7 - 3 10 - 3 becomes 4 : 7. 8 N/ cm ___________. All that is left is to isolate . ___________, Explanation: −6w − 18 ≥ 36 5 > z − 3 Quickly access your most used files AND your custom generated worksheets! Joanna joins a CD club. Type below: Which represents the solution for the inequality 3x − 7 > 5? 7x ≤ 63 Type below: 5p ≥ −30 The number opposite to the variable is 9, we look for this in the number line. Answer: Answer: Since the two inequalities are joined by “and”, we need to satisfy both inequalities. Type below: c. x > 4 The pattern is that when the number on the left side of the inequality is 9 less than the number on the right side of the inequality, the answer is x > 9. The interpretation of this solution is that width must be a positive real number that is at most 15 inches. 11 − 5y < −19 -3x = 30 – 42 Therefore n > $$\frac{1}{n}$$, Question 1. 6 divides 36 six times d. −4n + 11 > −9 Question 21. This is the same quadratic equation, but the inequality has been changed to$$\red . 6 Write an inequality to find the numbers of people that can sit in a ground-floor row if the balcony is full. You use an inequality when the solution can have more than one value. Solution Step 1: First graph 2x - y = 4. Chet needs to buy 4 work shirts, all costing the same amount. __________. Options: Solve the inequality. 11 – 5y – 11 < −19 – 11 49 > -7v ______ pairs of shoes, Explanation: Its graph would like the one below: Question 11. z ≤ 64, Question 13. __________. Can the submarine reach the entrance to the cave in less than 10 seconds? Teri scored +1 on each of the first three holes at a nine-hole miniature golf course. Let t represent the temperature in degrees Celsius. 15x − 20 ≤ 130 For Math tutor: Subtract 7 from both sides Type below: Given equation is c. 1.65x − 0.85 = 20 __________. Identify what your variable represents. The number opposite the variable is -5, we look for this in the number line. Answer: d. x ≥ 4. Since 3 ÷ 3 = 1 and 57 ÷ 3 = 19 factor out 3 from both terms. d. Describe the solution set of the compound inequality x > 2 or x < 7. Remember to switch the inequality symbol since you are dividing by a negative number. The balcony holds 120 people. 0 > -11, Question 4. To graph inequalities, locate the number opposite the variable of the inequality on a number line. Observe part a the units N/cm since the units for y are N and the units for x are cm and the units for k must be the units for y divided by the units for x. (−0.5x − 4) − 1.5x – 2.3 Solve the inequality in part a. The number opposite to the variable is -16, we look for this in the number line. -4t/-4 ≤ -80/-4 Subtract 6 on both sides Explanation: Subtract 9 on both sides Type below: 4% then 32x is the total number of people sitting in the ground floor. x < 8 Divide both sides by -0.3 Find the total amount he will spend buying 6 pairs of shorts this is more than the$75 he has so he will not have enough. Critical Thinking If the inequality is either a ≤ or a ≥, we use a closed dot, meaning the number is a solution as well. Type below: Answer: To graph inequalities, locate the number opposite the variable of the inequality on a number line. ___________. So far, they have raised $1,250. Question 21. Each section except the first section contains three levels of compound inequalities worksheets based on either solving or graphing or both. She pays$7 per month plus $10 for each CD that she orders. Find an inequality that you can use to disprove John’s statement. Question 22. x ≤ -1 Subtract 39 on both sides and then divide both sides by 8. 8x + 56 The graph of the solution divides the number line into three sections. Exercise 2 2 If the singer is ill, they'll cancel the. Type below: Free trial available at kutasoftware.com. n -5 Check out the topics of Chapter 7 Writing and Solving One-Step Inequalities before you start practicing. 15.5w ≥ 170.5 Its graph would like the one below: Question 3. −25 + $$\frac{t}{2}$$ + 25 ≥ 50 + 25 _____________, Explanation: The original price is$42 so the discount price is 42 – 3x Type below: Thus the correct answer is option D. Question 11. k = 8, Question 1. First, solve the inequality: Type below: By … 5p ≥ −30 Identify what your variable represents. If the inequality is either a > or a <, use an open dot, indicating that the number is not a solution. 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