images.pcmac.orgimages.pcmac.org/sisfiles/schools/nc/onslowcounty/... · web viewwrite an...

Equations & Inequalities Chapter Questions

1. When given a set of possible solutions to an equation or inequality, how do you determine which are solutions?

2. What are inverse operations? Name them.

3. How do you solve equations?

4. How do we translate a statement into an inequality?

5. Explain the steps to graphing an inequality on a number line.

NJ Center for Teaching and Learning ~ 1 ~ www.njctl.org

Solving Equations Chapter Problems

Writing EquationsClasswork

1. Larry has 14 toy cars. His grandparents give him some more toy cars. Now he has 22 toy cars. Write an equation that can be used to determine how many toy cars Larry’s grandparent’s give him.

2. Kenya did 16 pull-ups at the end of the month. This was 4 times as many pull-ups as she was able to do at the beginning of the month. Write an equation that can be used to find the number of pull-ups Kenya could do at the beginning of the month.

3. Tracy worked 28 hours this week. That was 3 hours less than Frank worked. Write an equation to figure out how many hours Frank worked.

4. During the school Walk-a-Thon, each class completed an average of 64 laps around the track. The school completed 832 laps all together. Write an equation to represent the number of classes that participated in the Walk-a-Thon.

Homework

5. Jennifer bought 3 bags of trail mix to make snack packs. She made 18 snacks packs with the trail mix. Write an equation to represent the number of snack packs each bag of trail mix made.

6. Samantha, who is 3 years older than Francis, is 12. Write an equation to represent Francis’ age.7. Frederick is half as tall as his older sister. His older sister is 62 inches tall. Write an equation to

represent Frederick’s height.8. Franco bought a bag of 25 jolly ranchers. After sharing with his friends, he had 13 left. Write an

equation to represent the number of jolly ranchers he shared with his friends.

Determining Solutions to EquationsClasswork

9. Use the solution set to determine the solution to each equation.a. x + 12 = 20 {5, 6, 7, 8}b. x - 13 = 32 {43, 44, 45, 46}c. 2x + 4 = 26 {9, 10, 11, 12}d. 5y – 3 = 57 {9, 10, 11, 12}e. 4x + 3 = 15 {3, 4, 5, 6}f. 5p – 4 = 16 {3, 4, 5, 6}g. 5g + 15 = 25 {1, 2, 3, 4}h. 7h – 14 = 42 {8, 9, 10, 11}

Homework

10. Use the solution set to determine the solution to each equation.a. x + 19 = 33 {12, 13, 14, 15}b. x - 12 = 26 {35, 36, 37, 38}c. 4x + 9 = 45 {7, 8, 9, 10}d. 5y - 19 = 16 {5, 6, 7, 8}e. 7g + 17 = 45 {4, 5, 6, 7}f. 9h - 4 = 41 {3, 4, 5, 6}g. 6m + 13 = 79 {8, 9, 10, 11}h. 8x – 7 = 57 {5, 6, 7, 8}


Inverse OperationsClasswork

11. Name the inverse operation needed to solve for the variable.a. x + 9 = 17b. y – 8 = 5c. m + 5 = 21

d.e. 9v = 108

Homework

12. Name the inverse operation needed to solve for the variable.a. t – 18 = 54b. 14x = 228c. m + 19 = 51d. 11b = 66

e. 13. When solving an equation, why do you apply the inverse of the given operation to both sides?

Solving One Step Equations with Addition and SubtractionClasswork

14. Solve.a. n + 7 = 20b. x + 9 = 28c. a + 15 = 27d. y + 29 = 35e. 50 + w = 92f. 4 + m = 18g. x – 6 = 15h. y – 19 = 27i. m – 56 = 32j. x – 9 = 72k. y – 17 = 56l. z – 5 = 98

Homework

15. Solve.a. n + 9 = 13b. 14 + b = 21c. z + 18 = 42d. 7 + g = 63e. 19 = 15 + yf. b + 4 = 71g. x – 7 = 16h. y – 25 = 34i. m – 19 = 39


126

w

24

m

j. y – 13 = 67k. z – 43 = 57l. x – 32 = 77

Solving One Step Equations with Multiplication and DivisionClasswork

16. Solve.a. 7x = 84b. 30 = 12mc. 5m = 25d. 10c = 80e. 13m = 143f. 9y = 126

g.x5

= 13

h.y4 = 12

i.z8 = 10

j.x7

= 25

k.x9 = 45

l.y5 = 62

Homework

17. Solve.a. 18x = 360b. 17y = 51c. 9p = 99d. 15c = 75e. 8r = 136f. 6x = 108

g.x5 = 12

h.y4

= 13

i.z8

= 40

j.x7 = 35

k.x9

= 56


l.y5

= 26

Writing Simple InequalitiesClasswork

18. Write an inequality for each sentence below.a. y is less than 8.b. f is greater than -5.c. j is greater than or equal to 4.d. The speed limit, s, cannot exceed 55 mph.e. 10 is less than or equal to x.f. A number, x is at least 15.g. A number, h is not greater than 4.h. x is not more than 20.i. A number, z, is negative.j. To have a passing grade, g, must exceed a 70.k. k is less than or equal to -3.l. The total, t, is fewer than 8 items.m. -2 is less than a number, n.n. The time, t, on your quiz cannot exceed 20 minutes.o. At most, 4 students, s, will fail the test.

Homework

19. Write an inequality for each sentence below.a. w is greater than 7.b. p is less than or equal to -1.c. m is less than 5.d. 11 is greater than or equal to k.e. A number, f is positive.f. The total, t is fewer than 4 items.g. 4 is less than a number, n.h. The speed limit, s, cannot exceed 25 mph.i. A number c is at least 12.j. w is not more than 50.k. g is more than or equal to 8.l. h is not less than -5.m. The time, t for lunch cannot exceed 30 minutes.n. At most, 25 students, s, will be in the class.o. To have an A in class, g, must exceed a 92.

Solutions to Simple InequalitiesClasswork

20. Use the solution set to determine the solutions to each inequality.a. x < 17 {15, 16, 17, 18}b. m > 9 {8, 9, 10, 11}c. r < 9 {7, 8, 9, 10}d. b > 23 {21, 22, 23, 24}e. m < 27 {26, 27, 28, 29}


f. 3r > 18 {4, 5, 6, 7}g. 8y < 24 {2, 3, 4, 5}h. 9x < 45 {4, 5, 6, 7}

Homework

21. Use the solution set to determine the solutions to each inequality.a. y > 14 {13, 14, 15, 16}b. x < 16 {14, 15, 16, 17}c. m < 9 {8, 9, 10, 11}d. g > 13 {12, 13, 14, 15}e. x < 32 {31, 32, 33, 34}f. 4y > 32 {6, 7, 8, 9}g. 3g > 26 {12, 13, 14, 15}h. 7m < 56 {6, 7, 8, 9}

Graphing Solution Sets to Simple InequalitiesClasswork

22. Write an inequality for the graph below.







28. Graph the solution for each inequality.a. w > 7b. p < -1c. m < 5d. 11 ≥ ke. f > 0f. t < 4g. 4 < n

29. Write an inequality for each sentence below, and then graph the solutions of each inequality on a number line.

a. x is less than fifteen.b. y cannot exceed twenty.c. Twenty is less than or equal to m.d. The cost, c, is more than $50.e. Twelve is greater than or equal to b.

Homework 30. Write an inequality for the graph below.


36. Graph the solution for each inequalitya. s < 25b. x ≥ 12c. w < 50d. g ≥ 8e. h ≥ -5f. t < 30g. 25 ≥ s

37. Write an inequality for each sentence below, and then graph the solutions of each inequality on a number line.

a. y is greater than nine.b. x is less than or equal to sixteen.c. Nineteen is greater than m.d. Your height, h, must exceed 42 inches.e. The weight limit, w, is 225 pounds.

Equations and Inequalities Multiple Choice Problems

1. Use the solution set to determine the solution to 4x = 68 {16, 17, 18, 19}a. 16b. 17c. 18d. 19

2. Use the solution set to determine the solution to 3x – 5 = 22 {7, 8, 9, 10}a. 7b. 8c. 9d. 10

3. Name the inverse operation used to solve this equation: x – 7 = 13a. Multiplicationb. Divisionc. Additiond. Subtraction

4. Name the inverse operation used to solve this equation: x3

= 21

a. Multiplicationb. Divisionc. Additiond. Subtraction

5. Name the inverse operation used to solve this equation: 5x = 25a. Multiplicationb. Division


c. Additiond. Subtraction

6. Name the inverse operation used to solve this equation: x + 9 = 27a. Multiplication b. Divisionc. Additiond. Subtraction

7. Solve the equation: 12x = 96a. x = 1152b. x = 8c. x = 9d. x = 84

8. Solve the equation: y + 36 = 43a. y = 7b. y = 79c. y = 8d. y = 78

9. Solve the equation: p – 12 = 56a. p = 44b. p = 4c. p = 5d. p = 68

10. Solve the equation: x5

= 12

a. x = 7b. x = 2c. x = 60d. x = 3

11. Translate into an inequality: A number, x, is less than 35.

a. x < 35b. x > 35c. x > 35d. x < 35

12. Translate into an inequality: the speed, s, cannot exceed 55 mph.a. s < 55b. s > 55c. s > 55d. s < 55


13. Translate into an inequality: the people in attendance at the concert, p, exceeds 1,200.a. p < 1,200b. p > 1,200c. p > 1,200d. p < 1,200

14. Translate into an inequality: the number 13, is less than or equal to the number of spots, s, on the dog.

a. s < 13b. s > 13c. s > 13d. s < 13

Equations and Inequalities Short Constructed Response Questions

1. Use the solution set to determine the solutions to: p < 12 {10,11,12,13}

2. Use the solution set to determine the solutions to: 11r > 36 {2, 3, 4, 5}

3. Use the solution set to determine the solutions to: x – 32 < 4 {34, 35, 36, 37}

4. Use the solution set to determine the solutions to: y + 25 > 39 {12, 13, 14, 15}

5. James, who is 14, is three times younger than his father. Write and solve an equation to

determine his father’s age.

6. A shipping company packs crates of milk. They packed 23 crates with 32 milk jugs each. Write

and solve an equation to find the total number of milk jugs they packed.

7. Marcus has 19 his rare coin collection. His brother also collects rare coins. Together, they have 43 rare coins. Write and solve an equation to show how many coins are in his brother’s collection.


8. Write the inequality for the graph below.




Equations and Inequalities Extended Constructed Response

1. Fourteen less than the amount of money, m, is less than or equal to $35.a. Model with an inequality.

b. Use the solution set to determine the solution to the inequality. {49, 50, 51, 52}

c. Graph the solution to the inequality.

2. Three times the weight, w, is greater than 336 pounds.a. Model with an inequality.


b. Use the solution set to determine the solution to the inequality. {110, 111, 112, 113}

c. Graph the solution to the inequality.

3. Thirty-three more than a number, x, is 57.a. Model with an equation.

b. Solve the equation for x.

c. Explain how you found the solution to the equation.

4. Maria runs 7 miles every week. At the end of n weeks, she ran 91 miles.a. Model with an equation.

b. Solve the equation for n.

c. Write and solve an equation to determine the number of miles she would run in a year if she continued running at this rate.


CW-HW Answer Key

1. 14 + x = 22 2. 4x = 163. x-3 = 284. 832/x=645. 18/3 = x6. x + 3 = 127. 62/2 = x8. 25 - x = 139.

a. 8 b. 45c. 11d. 12e. 3f. 4g. 2h. 8

10. a. 14b. 38c. 9d. 7e. 4f. 5g. 11h. 8

11.a. Subtractionb. Additionc. Subtractiond. Multiplicatione. Division

12. a. Additionb. Divisionc. Subtractiond. Divisione. Multiplication

13. The equals sign indicates that both sides of the equation are equal. If we change one side of the equation, but not the other, then the two sides will no longer be equal.

14. a. 13b. 19c. 12d. 6e. 42f. 14g. 21h. 46i. 88j. 81k. 73l. 103

15.a. 4b. 7c. 24d. 56e. 4f. 67g. 23h. 59i. 58j. 80k. 100l. 109

16.a. 12b. 2.5c. 5d. 8e. 11f. 14g. 65h. 48i. 80j. 175k. 405l. 310

17.a. 20b. 3c. 11d. 5e. 17f. 18g. 60h. 52i. 320j. 245k. 504l. 130

18.a. y < 8b. f > -5c. j ≥ 4d. s < 55e. 10 < xf. x > 15g. h < 4h. x < 20i. z < 0j. g > 70k. k < -3l. t < 8m. -2 < nn. t < 20o. s < 4


19. a. w > 7b. p < -1c. m < 5d. 11 ≥ ke. f > 0f. t < 4g. 4 < nh. s < 25i. c ≥ 12j. w < 50k. g ≥ 8l. h ≥ -5m. t < 30n. s < 25o. g > 92

20. a. {15,16}b. {10,11}c. {7,8}

d. {23,24}e. {26,27}f. {7}g. {2,3}h. {4}

21. a. {14,15,16}b. {14,15}c. {8,9}d. {13,14,15}e. {31}f. {8,9}g. {12,13,14,15}h. {6,7,8}

22. x > -223. x < 724. x ≥ 225. x < 626. x < 527. x ≥ -75

28. a.

b.

c.

d.

e.

f.

g.

29. a. x < 15

b. y < 20

c. 20 < m

d. c > 50


e. 12 > b

30. x ≥ -631. x < -232. x < 433. x > 034. x > -1035. x ≥ 2.536.

a.

b.

c.

d.

e.

f.

g.

37. a. y > 9

b. x < 16

c. 19 > m

d. h > 42

e. w < 225


Equations and Inequalities Multiple Choice Problems

1. b2. c3. c4. a5. b6. d7. b

8. b9. d10. c11. d12. a13. b14. c

Equations and Inequalities Short Constructed Response Questions

1. 10, 11, 122. 4, 53. 34, 35, 364. 155. 14=x/36. 23(32)=x

7. 19+x=438. x > -69. x < 2

10. x < - 14

11. x > 5

Equations and Inequalities Extended Constructed Response Questions

1.a. m – 14 < 35b. 49c.

2.a. 3w > 336b. 113c.

3. a. x + 33 = 57b. x + 33 = 57

- 33 -33 x = 24

c. I used the inverse operation of addition, which is subtraction, to solve this equation. I subtracted 33 from both sides of the equation to get 24 for the value of x.

4.a. 7n = 91b. 7n = 91

7 7n = 13


Maria ran for 13 weeks.c. 52(7) = x

364 = xIf Maria continues at this rate, she will run 364 miles in a year.


images.pcmac.orgimages.pcmac.org/sisfiles/schools/nc/onslowcounty/... · web viewwrite an...

Documents