MATHEMATICS LPS Algebra 1 Benchmark #1 1 Go On MATHEMATICS 1 3 Yasmine is raising money for a charity. To get her started, her parents pay her $25 to clean the house. She earns $8 an hour for babysitting. The expression 8x + 25 represents the total Yasmine raises. A salesperson sells x premium plans per week and y discount plans per week. To earn a bonus, he must sell more than 30 plans within the week and at least twice as many premium plans as discount plans. What does the coefficient represent? Which number of premium plans and discount plans will not earn the salesperson his bonus? A amount of money raised B rate per hour for babysitting A 20 premium plans; 10 discount plans C number of hours babysitting B 30 premium plans; 15 discount plans D payment for cleaning the house C 40 premium plans; 20 discount plans D 46 premium plans; 20 discount plans 2 Consider the graph that represents the number of adults, in thousands, who participate in a city’s recycling program each year. 4 Oil enters a pipeline at a rate of 60 barrels/hour. There are 42 gallons/barrel of oil and 50 gallons/foot of oil. One mile equals 5,280 feet. About how long, in hours, will it take to fill one mile of the pipeline? If this trend continues, how many thousand adults would be participating in the city’s recycling program after 15 years? A 24 B 50 A 200 C 105 B 300 D 151 C 280 D 440 LPS Algebra 1 Benchmark #1 2 Go On MATHEMATICS 5 7 A folder on a computer has a capacity of 7.5 gigabytes (GB) of data space. A movie that uses 3.27 gigabytes (GB) of data space is downloaded into the folder. What number of gigabytes most accurately represents the available data space the folder now contains? Kenneth has worked out a study program to prepare for end-of-year exams. His program includes x minutes of algebra and y minutes of English studies per week. He wants to spend at least 240 minutes studying these subjects per week, with more than three times as many minutes studying algebra as minutes studying English. A 4 GB Which pair of inequalities represents the constraints? B 4.2 GB C 4.23 GB A y – 240 ≥ x ; x < 3y D 4.233 GB B x – 240 ≥ y ; 3x < y C x + y ≤ 240 ; x > 3y D x + y ≥ 240 ; x > 3y 6 This formula shows the area, A, of a trapezoid with base lengths b1 and b2 and height h. 8 A = h(b1 + b2) 2 If the area, the height, and base b1 of the trapezoid are given, which equation can be used to determine the length of base b2? A b2 = Consider this equation. Ax – 17 = 2x + 3 Solve for x in terms of A. A x= 2𝐴 - b1 ℎ B x= B b2 = C b2 = D b2 = 2𝑏1 ℎ -A C x= 2𝐴− 𝑏1 D x= ℎ 20 𝐴−2 20 2−𝐴 2−𝐴 20 𝐴− 2 20 2𝐴 ℎ𝑏1 LPS Algebra 1 Benchmark #1 3 Go On MATHEMATICS 9 10 Tameka works for Organic Farmers of Oregon and is preparing for an upcoming conference. She translates the information from the table into a line graph. She forgets to add the vertical scale for the number of acres. Consider the equation. 2x – 12 = 7x + 5 -2 3 What is the solution to the equation? A B C D 11 −12 5 17 20 13 10 13 4 The flow rate of a river can be determined by Q = WDV, where Q is the flow rate, W is the width, D is the depth, and V is the velocity. If the flow rate is 427.5 cubic feet per second and the velocity is 10 feet per second, which equation represents depth, D, of the river? Which list contains the values of the vertical scale, in thousands of acres, Tameka should use? A A 20; 30; 40; 50; 70; 80; 90 427.5 10𝑊 =𝐷 B 20; 30; 40; 50; 60; 70; 80 B C 30; 40; 50; 70; 80; 100 D 427.5𝑊 10 =𝐷 30; 50; 70; 90; 110; 130 C 10W(427.5) = D D 427.5 – 10W = D LPS Algebra 1 Benchmark #1 4 Go On MATHEMATICS 14 12 Natalia has two credit cards. One charges 12% annual interest, and the other charges 18% annual interest. She paid $650 in interest this year. Manuel joins a car share service. He will be charged $120 for an application fee and car rental. He must also pay $0.35 per mile for each mile driven over 150 miles. Which equation can be used to find the possible amounts of money that were charged to each of Natalia’s credit card? Which inequality shows the total number of miles Manuel can drive without the charges exceeding $200? A 0.12a + 0.18b = 650 A 120 + 0.35x ≤ 200 B 0.12a – 0.18b = 650 B 120 + 0.35 + x ≤ 200 C 120 + 0.35x – 150 ≤ 200 C 650(0.12a) = 650(0.18b) D 120 + 0.35(x – 150) ≤ 200 D (0.12 + 0.18)(a + b) = 650 13 Consider the expression used to convert degrees Fahrenheit to degrees Celsius, where F is degrees Fahrenheit. 15 𝟓 (𝑭 − 𝟑𝟐) 𝟗 Which statement accurately interprets the impact of adding k to the value of F? Kim plans to spend between $10 and $12 to purchase songs from an online music store. The music store sells downloaded songs for $1.25 each and offers a $2.00 discount. The compound inequality describes the number of songs, s, Kim can purchase. 10 < 1.25s – 2 < 12 A adds k to the value of the expression 5 B adds 9 𝑘 to the value of the expression How many songs can Kim purchase? C subtracts k from the value of the expression A 8 or 9 B 9 or 10 5 C 10 or 11 D subtracts 9 𝑘 from the value of the expression LPS Algebra 1 Benchmark #1 D 11 or 12 5 Go On MATHEMATICS 16 18 A student simplifies the equation 3x + 16 = 7x to the equivalent equation shown. A construction company has designed an elevator to carry cement mix from the ground to the roof. The elevator has a maximum capacity of 3,170 pounds. It takes 2 construction workers to operate, load, and unload the elevator. The first worker weighs 225 pounds and the second worker weighs 245 pounds. 16 = 4x Which statement explains how the student simplifies the equation? A divides both sides by x Which inequality represents the number of bags of cement mix that can be taken on any one trip if a bag of cement mix weighs 45 pounds? B multiplies both sides by 4 C adds 4x to the right side D subtracts 3x from both sides A 225 + 245 + 45x ≥ 3170 B 225 + 245 + 45x ≤ 3170 C 225 + 245 – 45x ≥ 3170 D 225 + 245 – 45x ≤ 3170 17 Duane buys five movie tickets from a theater’s website. He pays a $6 service charge for using the website. His total cost can be expressed as 5x + 6. 19 The distance (d) an airplane travels is given by the equation d = vt, where v represents the velocity of the airplane and t represents the time the airplane travels. What does the variable represent? A total cost If the distance is given in kilometers (km) and the time is given in minutes (min), what is the unit for the velocity? B number of tickets C cost of one ticket D amount of service charge A km B min C min/km D km/min LPS Algebra 1 Benchmark #1 6 Go On MATHEMATICS 20 22 Consider the function f(x) = 3x + 2. What is the value of f(-4)? Mark is playing a computer game, Jungle, which requires him to rescue endangered animals. Rescuing an endangered animal earns r points, while being unable to save an endangered animal costs d points. Players earn 10 bonus points for completing each level. At a certain point in time, Mark’s score is given by the expression shown. A -1 B 1 C 14 D -10 (9r – 4d) + 10 Which scenario explains Mark’s score? A Mark rescued 5 endangered animals and completed ten levels. 21 B Mark rescued 19 endangered animals and was unable to save 6 endangered animals. Timothy has completed 4 assignments for math class. After his next assignment he wants his mean grade to be 85. The mean value of a set of 5 numbers is calculated using this formula. 85 = C Mark rescued 9 endangered animals, was unable to save 4 endangered animals, and completed one level. D Mark rescued 9 endangered animals, was unable to save 4 endangered animals, and completed ten levels. 𝒏𝟏 + 𝒏𝟐 +𝒏𝟑 + 𝒏𝟒 + 𝒏𝟓 𝟓 Which formula should Timothy use to calculate the grade he needs to earn on his fifth assignment? A n5 = 23 (5)(85) 𝑛1 + 𝑛2 +𝑛3 + 𝑛4 B n5 = 85 - 𝑛1 + 𝑛2 +𝑛3 + 𝑛4 5 Let x equal the cost to purchase from Company B. Which equation can be used to find the cost to purchase the telescope from Company B? C n5 = 5(85) – n1 – n2 – n3 – n4 D n5 = 5(85) – n1 + n2 + n3 + n4 LPS Algebra 1 Benchmark #1 The cost to purchase a certain model telescope from Company A is $60 more than half the cost to purchase the same telescope from Company B. The cost to purchase the telescope from Company A is $170. A B C D 7 170 = 2x + 60 170 = 0.5x + 60 x = 170(0.5) + 60 x = (0.5)(170 + 60) Go On MATHEMATICS 25 24 A company is offering an incentive for employees to join a gym. The gym membership includes a monthly fee and a $60 joining charge. The company will pay $200, which is equal to one-third of the yearly cost for members. The incentive is represented by this equation, where x is the monthly fee. 200 = 𝟏 𝟑 (12x + 60) The graph below describes a student’s drive from home to school. Four points are labeled on the graph. Which statement describes the steps to determine the monthly fee? Which statement is an accurate description of the indicated point on the graph? A subtract 60 from each side of the equation, divide each side of the equation by 12, and then multiply each side of the equation by 3 A At point D, the student was 15 miles from home. B subtract 60 from each side of the equation, multiply each side of the equation by 12, and then divide each side of the equation by 3 B At point A, the student turned around to head back home. C At point B, the student was stopped at a stoplight for 1 minute. C multiply each side of the equation by 3, subtract 60 from each side of the equation, and then divide each side of the equation by 12. D At point C, the student was driving at a steady speed for 3 minutes. D divide each side of the equation by 3, subtract 60 from each side of the equation, and then multiply each side of the equation by 12 LPS Algebra 1 Benchmark #1 8 Go On MATHEMATICS 26 28 Consider this inequality. -4x ≤ Consider the following system of equations. 𝒙 + 𝟏𝟖 2x – 3y = -2 y = -4x + 24 𝟐 What is the solution to the inequality? What is the solution to the system? A x≤2 A (5, -4) B x≥2 B (5, 4) C x ≤ -2 C (-5, -4) D x ≥ -2 D (-5, 4) 29 27 Consider the graph of these linear equations. Alida’s exercise program includes x minutes of aerobic exercise and y minutes of weight training per week. She is supposed to have a minimum of 180 minutes of exercise per week, with more than twice as many minutes of aerobic exercise as minutes of weight training. -2y = -x 2x + 6y – 15 = 0 Which solution is reasonable with the given constraints? A (60, 120) B (80, 170) What is the solution to the system? 5 A (0, 2) C (115, 55) 3 B (3,2) C The system has no solution. D The system has many solutions. D (125, 60) LPS Algebra 1 Benchmark #1 9 Go On MATHEMATICS 30 31 System B in the table below is created by retaining the first equation from System A and replacing the second equation. The second equation is replaced with the sum of the first equation from System A and the product of 2 and the second equation in System A. Consider this set of inequalities. y–x<1 y+x≥3 Which graph represents the solutions to this set of inequalities? A B C D What can be said about the graphs and solutions for the two systems? A The graphs of System A and System B have the same lines, and the systems have the same solution. B The graph of System A has one line that differs from the graph of System B, so the systems have different solutions. C The graph of System A has one line that differs from the graph of System B, but the systems have the same solution. D The graph of System A has two lines that differ from the graph of System B, and the systems have different solutions. LPS Algebra 1 Benchmark #1 10 Go On MATHEMATICS 32 33 What are the x-and y-intercepts of the equation graphed below? Which equation could be the line of best fit for this scatter plot? A x-intercept = 1; y-intercept = -1 B x-intercept = 2; y-intercept = -2 A y= C x-intercept = -1; y-intercept = 1 1 19 B y=− D x-intercept = -2; y-intercept = 2 C y= 5 9 x + 74 1 19 x + 74 x+8 5 D y=− 9x+8 34 Consider the following system of equations. x – 2y = -9 x + 3y = 16 What is the solution to this system? A (1, 5) B (5, 1) C (-5, 7) D (7, -5) LPS Algebra 1 Benchmark #1 11 Go On MATHEMATICS 35 Mandee is testing the download speed on her computer. She downloads 10 different files of various sizes from different websites. She collects data on the size of the download in megabytes (MB) and the time the download takes in seconds. (s). For the first 5 downloads, the correlation coefficient is 0.78. 36 The Carters are deciding whether to install new insulation in their home and want to calculate how cost effective it would be and when they could expect a payback on their investment. The graph shows their expected costs (yearly fuel bills plus the cost of any new insulation) over a period of years. Which set of data would product a correlation for the remaining downloads that is most similar to the first 5 downloads? A B Which statement does not accurately represent the information in the graph? A The initial cost of installing the insulation will be b dollars. B The savings from their investment in insulation will show after a years. C C The slope of Line A represents the amount they are now paying in fuel bills each year. D The graph shows that if they do not install new insulation, the slope of their yearly fuel bills will rise. D LPS Algebra 1 Benchmark #1 12 Go On MATHEMATICS 37 38 What does the scatter plot imply about the relationship between coffee sales and the average daily temperature? An airplane can carry a maximum of 150 passengers. Each passenger receives a meal and can choose either vegetarian or beef. The airline’s policy states that each airplane must carry 1 vegetarian meal for every 5 beef meals. The airplane is supplied with x vegetarian meals and y beef meals. Given the system of inequalities and equations x + y ≤ 150 and y = 5x, what is the value of x, the number of vegetarian meals? A x ≤ 25 B x = 25 A There are fewer coffee sales when the temperature is higher. C x < 25 D x ≤ 30 B Higher temperatures will cause coffee sales to rise. C Coffee sales are going down. D Coffee sales will never be less than $150. LPS Algebra 1 Benchmark #1 13 Go On MATHEMATICS 39 40 The equation y = 0.002x + 4.75 models the total cost in dollars, y, of using a 20-watt compact fluorescent light bulb for x hours. The table models the cost of using a 60-watt incandescent light bulb. The scatter plot below displays the distance someone traveled as a function of time. Which value is the best estimate of the correlation coefficient? Which solution represents the number of hours of use when the costs of using the two light bulbs are the same? A -0.50 A 600 hours B 0.50 B 688 hours C -0.17 C 1000 hours D 0.17 D 1148 hours LPS Algebra 1 Benchmark #1 14 Go On MATHEMATICS 41 42 Which of the following equations is represented by this graph? What system of inequalities defines the shaded areas below? A y=-¼x-1 A y > x + 1 and x < 2.5y B y=¼x–1 B y ≥ x + 1 and x > 2.5 C y = - 4x – 1 C y ≤ x + 1 and x > 2.5 D y = 4x – 1 D y ≤ x + 1 and x < 2.5 LPS Algebra 1 Benchmark #1 15 Go On MATHEMATICS 43 44 Based on the data in the scatter plot below, what would be the value of a three-year-old car? George and Mario have been publishing a weekly newspaper. They sold copies at various prices: $0.25, $0.75, and $1.00, as shown in the graph below. They have made a business deal with a printing company for 600 copies per week. At what price per copy are they likely to sell 600 copies? . A $12,000 B $9,000 C $5,000 A $0.30 D cannot be determined B $0.40 C $0.50 D $0.60 LPS Algebra 1 Benchmark #1 16 Go On MATHEMATICS 45 46 Mary loves to drink espresso drinks in the morning. She makes a table of how many espresso drinks she is willing to buy at each price. This table is displayed below. Which ordered pair is a solution to the system of inequalities graphed below? . Which best describes the linear correlation between the price of espresso drinks and the number of espresso drinks she is willing to buy? A (-2, 0) B (0, 2) C (-3, -3) D (2, 0) A Strong negative correlation B Strong positive correlation C Weak negative correlation D Weak positive correlation LPS Algebra 1 Benchmark #1 17 Go On MATHEMATICS 47 49 During the renovation of a house, a contractor has a budget of $4500 for installing new energy efficient windows. Each window costs $225 and there is a flat delivery rate of $60. The installation cost per window is $80. The total cost, c, of replacing x windows is represented by this equation. Ohm’s law states that the current (in amps I) through a resistor is directly proportional to the voltage (in volts V) and inversely proportional to the 𝑽 resistance (in ohms R): I = 𝑹 The graph shows the current through a resistor as the voltage increases. 80x + 60 + 225x = c Which solution shows the number of windows that can be installed? A 12 windows B 14 windows C 16 windows D 15 windows 48 After ordering the maximum number of windows, the contractor discovers that an additional 8 windows are required to complete the installation. Explain how to find the revised budget for completing the installation? What does the slope of the graph represent? The slope represents amps per volt or There are now 22 windows needed. amps/volts. 22 @ $225 each is $4,950 to purchase the windows. What is the resistance of the resistor in ohms? 22 @ $80 each is $1,760 to install the windows. The cost for the windows is $4,950 + $1,760 = 10 ohms $6,710. Adding the $60 for delivery gives a The resistance is I = V/R. Substituting I for amps and V for volts, if we use 12 amps = 120 volts/R ohms, then R is 10 ohms. total cost of $6,770. What is the total cost for completing the job? ___$6,770_______________ LPS Algebra 1 Benchmark #1 18 END Go On