Algebra 1 College Prep Midterm REVIEW

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Algebra 1 College Prep Midterm REVIEW

What is an algebraic expression for the word phrase?

1. 2 times the sum of y and k

2. The quotient of 6 and the difference of c and n

3. The table shows how the height of a stack of DVDs depends on the number of DVDs. What is a rule for the height?

Number

of DVDs Height

2

3

(cm)

14

21

4

n

28

?

What is the simplified form of each expression?

4.

5.

6. Evaluate , for u = 18, x = 5, y = 8, and z = 3.

What is the simplified form of each expression?

7.

8. A square field has an area of 121 ft 2 . What is the approximate length of a side of the field? Give your answer to the nearest foot.

9. Give an example of a rational and an irrational number. What is the difference between the two types?

10. What is the square root of 96 to the nearest integer?

11. What is the order of , 0.3,

1

9

, 0.4, from least to greatest?

What property is illustrated by each statement?

12. 10 + 6.9 = 6.9 + 10

13. –2 + (7 + 9) = (–2 + 7) + 9

Simplify each expression.

14.

15. (2 + 4f) + 4

16. You made two deposits to your bank account this month. One deposit was $18.15, and the second deposit was $16.03. Your balance at the end of the month is $72.31, and you made no withdrawals.

Write and evaluate an expression for your balance at the beginning of the month.

What is the simplified form of each expression?

17.

2

3

(–6m + 12)

18.

What sum or difference is equivalent to the expression?

19.

20.

What is the simplified form of each expression?

What is the solution of the equation?

21. 4.7x + 4.3 = 13.7

22.

5

8

x – 3 = 7

23. Steven wants to buy a $600 bicycle. Steven has no money saved, but will be able to deposit $35 into a savings account when he receives his paycheck each Friday. However, before Steven can buy the bike, he must give his sister $65 that he owes her. For how many weeks will Steven need to deposit money into his savings account before he can pay back his sister and buy the bike?

What is the solution of the equation?

24.

25. Angela and Neil are going to the movies. They each bought a medium popcorn, and Neil got a small soft drink. Angela had a $20 gift certificate to put toward the cost, and Neil paid the rest, which came to

$7.00. A movie ticket costs $7.50 and a medium popcorn costs $4.70. How much does a small soft drink cost at the theater?

What is the solution of the equation?

26. 3x + 7 = 6x – 2

27.

28.

29. What equation do you get when you solve for x?

30. You are shopping for jeans. City Express sells 3 pairs of jeans for $53. Denim Planet sells 2 pairs of jeans for $78. New Threads sells 4 pairs of jeans for $105. Which store has the best deal?

What is the solution of the proportion?

31.

32.

33.

34. A van travels 320 miles on 16 gallons of gas. Find how many gallons the van needs to travel 360 miles.

35. A dress that normally costs $57.50 is on sale for 40% off. What is the sale price of the dress?

36. You deposited $1800 dollars in a savings account that earns a simple interest rate of 2.25% per year.

How many years do you need to keep the money in the account to earn $81 in interest?

37. The viewership of a television show has decreased from 5.3 million viewers to 3.3 million viewers per episode. Find the percent of decrease in viewership to the nearest percent.

38. Sarah is currently making $34,000 a year at her job and has been offered a raise to $38,420 per year.

What would be the percent increase in her salary?

39.

What inequality represents the graph?

–10 –8 –6 –4 –2 2 4 6 8 10

40.

–5 –4 –3 –2 –1 1 2 3 4 5

What inequality describes the situation?

41. Let t = the amount Thomas earned. Thomas earned $44 or more.

What are the solutions of the inequality? Graph the solutions.

42.

43. Your class hopes to collect at least 450 cans of food for the annual food drive. There were 126 cans donated the first week and 130 more the second week.

Write an inequality that describes this situation. Let c represent the number of cans of food that must be collected by the end of the third week for your class to meet or surpass your goal. How many cans are needed to meet or surpass your goal?

What are the solutions of the inequality? Graph the solutions.

44. –9b < –18

What are the solutions of the inequality? Check the solutions.

45. –

1

4

x – 7 <

7

12

46.

What are the solutions of the inequality?

47.

What are the solutions of the inequality?

48.

What compound inequality represents the phrase? Graph the solutions.

49. All real numbers that are greater than –6 and less than 6

50. All real numbers x that are less than 4 or greater than 10

What are the solutions of the compound inequality? Graph the solutions.

51. –1 < 4x – 5 < 15

What are the solutions of the compound inequality? Graph the solutions.

52.

53. The table shows the amount of money made by a summer blockbuster in each of the first four weeks of its theater release. Draw a graph that could represent the data listed.

Week

1

2

Money ($)

20,000,000

10,000,000

5,000,000

2,500,000

3

4

What are the variables in each graph? Describe how the variables are related at various points on the

graph.

54. The graph shows the number of handbags that Jenny made in one day. What are the variables?

Describe how the variables are related at various points on the graph.

Jenny's Handbags time

55.

Find the slope of the line. y

5

4

3

2

1

–5 –4 –3 –2 –1

–1

–2

–3

–4

–5

1 2 3 4 5 x

What is the slope of the line that passes through the pair of points?

56. (4, 5), (7, –3)

Write an equation of a line with the given slope and y-intercept.

57. m = 2, b = 5

58. What is an equation of the line in slope intercept form that passes through the given points?

(2, 1) and (6, 9)

Graph the equation.

59. y = x – 5 y

3

2

1

5

4

–5 –4 –3 –2 –1

–1

–2

–3

–4

–5

1 2 3 4 5 x

60. y = –5x – 2 y

3

2

1

5

4

–5 –4 –3 –2 –1

–1

–2

–3

–4

–5

1 2 3 4 5 x

61. –3.4x + 1.1y = 22.44

Find the x- and y-intercept of the line.

What is the graph of the equation?

62. y = –4 y

5

4

3

2

1

–5 –4 –3 –2 –1

–1

–2

–3

–4

–5

1 2 3 4 5 x

63. x = –2 y

5

4

3

2

1

–5 –4 –3 –2 –1

–1

–2

–3

1 2 3 4 5 x

–4

–5

5

64. Write y =

1

x + 8 in standard form using integers.

65. A paint store sells exterior paint for $27.75 a gallon and paint rollers for $8.00 each. Write an equation in standard form for the number of gallons p of paint and rollers r that a customer could buy with $130.

Write an equation for the line that is parallel to the given line and passes through the given point.

66. y =

1

2

x + 6; (–2, 2)

Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.

67. y =

1

4

x – 10

16x – 4y = 24

68. y =

1

8

x + 5

x + 8y = 4

69. y =

1

2

x – 11

9x – 18y = –15

Write the equation of a line that is perpendicular to the given line and that passes through the given

point.

70. y =

5

8 x

5

2

; (–4, 5)

71.

Graph the inequality. y

5

4

3

2

1

–5 –4 –3 –2 –1

–1

–2

–3

–4

–5

1 2 3 4 5 x

72. y

5

4

3

2

1

–5 –4 –3 –2 –1

–1

–2

–3

1 2 3 4 5 x

–4

–5

73. An electronics store makes a profit of $72 for every television sold and $90 for every computer sold. The manager’s target is to make at least $360 a day on sales from televisions and computers. Write a linear inequality and graph the solutions. What are three possible solutions to the problem?

In the diagram below, what is the relationship between the number of triangles and the perimeter of the figure they form?

5 5

7 7 7 7 7 7

5 5 5 5

1 triangle 2 triangles 3 triangles

____ 74. Which of the following represents the above relationship? a. The perimeter, P, is equal to the length of the base of one triangle multiplied by the number of triangles in the figure, n, plus two times the length of another side. The equation for the perimeter is . b. The perimeter, P, is equal to the length of a side of one triangle multiplied by the number of triangles in the figure, n, plus the length of the base. The equation for the perimeter is .

c. The perimeter, P, is equal to the length of the base of one triangle multiplied by the number of triangles in the figure, n, plus the length of another side. The equation for the perimeter is . d. The perimeter, P, is equal to the length of a side of one triangle multiplied by the number of triangles in the figure, n, plus two times the length of the base. The equation for the perimeter is .

____ 75. Suppose you know the perimeter of triangles. What would you do to find the perimeter of triangles?

76. a. Add 10 to the perimeter of triangles b. Add 5 to the perimeter of triangles c. Add 14 to the perimeter of triangles d. Add 7 to the perimeter of triangles

5 5

7 7 7 7 7 7

5 5 5 5

1 triangle 2 triangles 3 triangles

Represent the above relationship by filling in the table below.

Number of

Triangles

Perimeter

1

2

3

77. Represent the above relationship by drawing a graph.

40

35

30

25

20

15

10

5

60

55

50

45

1 2 3 4 5

Number of Triangles

6 7

78. Represent the relationship between the number of triangles and the perimeter of the figure they form as an equation. How does this equation relate to the method you would use to find the perimeter of

triangles from the perimeter of triangles?

Let P= perimeter of the figure, and n= number of triangles.

How does it relate to the table you created in question #76:

79. Will and John played a game of basketball together. Will scored four times as many as John.

Together, they scored a total of 60 points. a.

Write the equation. b.

Solve the equation to find out how many points BOTH players scored.

80. A runner ran at a rate of 0.18 miles per minute for a half hour one day. The next day, the runner ran at a rate of 0.15 miles per minute for 55 minutes.

Using the d = rt formula, how far did the runner run altogether?

81. Write the function (linear equation) that is represented by these data points: x

5

6

7 y

7

9

11

82. Give an example of a relation that IS A FUNCTION, and a relation that IS NOT A FUNCTION.

Justify/explain your answer.

What is an equation of the line?

83. y

5

4

3

2

1

–5 –4 –3 –2 –1

–1

–2

–3

–4

–5

1 2 3 4 5 x

84. Solve for .

85. The formula for the surface area of a cylinder is . What is the formula solved for h?

Algebra 1 College Prep Midterm REVIEW

Answer Section

1. 2(y + k)

2.

3. h = 7n

4. 196

5. 60

6. 20486

7.

5

11

8. 11

9.

10. 10

11.

1

9

, 0.3, 0.4, ,

12. Commutative Property of Addition

13. Associative Property of Addition

14.

 7

4

g

15. 6 + 4f

16. $72.31 – $18.15 – $16.03; $38.13

17.

4 8

18. 7.4b 2 – 0.4f

19.

4

7

x

1

7

20.

21. 2

22. 16

23. 19 weeks

24. 13

25. $2.60

26. 3

27. infinitely many solutions

28. no solution

29.

30. City Express

31. 78

32. –16.8

33. 40

34. 18 gallons of gas

35. $34.50

36. 2

37. 38%

38. 13%

39. x > 8

40. m

9

2

41.

42.

–20 –16 –12 –8 –4 4 8 12 16 20

43. 126 + 130 + c 450; c 194

44. b > 2

–16 –12 –8 –4

45. x >

30

1

3

46.

47. all real numbers

48. no solution

49. –6 < x < 6

4 8 12 16

–8 –6 –4

50. x < 4 or x > 10

–2

–14 –12 –10 –8 –6 –4 –2

51. 1 < x < 5

2 4 6 8

2 4 6 8 10 12 14 16 18 20 22

52.

53.

–10 –8 –6 –4 –2

or

–12 –10 –8 –6 –4 –2

2 4 6 8 10

2 4 6 8 week

54. The variables are the number of handbags and time. The flat parts of the graph show either where Mandy is working on a handbag or taking a break. As soon as Mandy finishes a bag, the graph jumps up a level to show that she has completed one more bag.

55.

2

56.

8

3

57. y = 2x + 5

59.

–10 –8 –6 –4 –2

–2

–4

–6

–8

–10

10

8

6

4

2 y

2 4 6 8 10 x

60. y

–10 –8 –6 –4 –2

–2

–4

–6

–8

–10

10

8

6

4

2

2 4 6 8 10 x

61. x-intercept is –6.6; y-intercept is 20.4

62. y

3

2

1

5

4

–5 –4 –3 –2 –1

–1

–2

–3

–4

–5

1 2 3 4 5 x

63. y

–5 –4 –3 –2 –1

–1

–2

–3

–4

–5

5

4

3

2

1

1 2 3 4 5 x

64. –x + 5y = 40

65. 27.75p + 8r = 130

66. y =

1

2

x + 3

67. perpendicular

68. neither

69. parallel

70. y =

8

5 x

71.

7

5 y

4

–4 O

–4

4 x

72.

4 y

–4 O

4 x

–4

73.

5

4

3

2

1 p

0

1 2 3

Television

4 5 s

74. A

75. B

76.

(5, 2), (3, 3), and (1, 4) are three possible solutions.

Number of

Triangles

Perimeter

1 19

2

3

24

29

60

55

50

45

40

35

30

25

20

15

10

5

77.

1 2 3 4 5

Number of Triangles

6 7

78. The equation relating the number of triangles to the perimeter of the figure is . The coefficient of in this equation is the same value that must be added to the perimeter of triangles to get the perimeter of

79. a) x+4x=60

triangles. b) Will=48, John= 12

80. sd;kjlsf

81. y=2x-3

82. no

83. y – 2 =

3

8

(x + 5)

84.

85. or

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