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mathematics
college algebra
Intermediate Algebra 13th Edition Margaret Lial, John Hornsby, Terry McGinnis - Solutions
Solve each inequality. Graph the solution set, and write it using interval notation. 2x 8 = -2x - IV
Solve each inequality. Graph the solution set, and write it using interval notation. x - 2(x - 4) = 3x
Solve each inequality. Graph the solution set, and write it using interval notation. 6x-4 ≥ −2x
Find the measure of each angle in the triangles shown. - (x + 11)° (3x - 36)° to
Find the measure of each angle in the triangles shown. (x + 61)° -(2x + 7)°
Find the measure of each angle in the triangles shown. (x - 30)° (2x - 120)° (1/x+15) ⁰
Find the measure of each angle in the triangles shown. -(3x + 7)º -(9x - 4)º (4x + 1).
Solve each inequality. Graph the solution set, and write it using interval notation. 5z +6 > -29
Find the measure of each angle in the triangles shown. (10x-20) -(x + 15)° (x + 5)°
Solve each inequality. Graph the solution set, and write it using interval notation. 3k + 1
Solve each inequality. Graph the solution set, and write it using interval notation. 3x - 2 -5 < 6
Solve each inequality. Graph the solution set, and write it using interval notation. 5x - 6 8 V 8
Sharon commutes to her office by train. When she walks to the train station, it takes her 40 min. When she rides her bike, it takes her 12 min. Her average walking rate is 7 mph less than her average biking rate. Find the distance from her house to the train station.
Mulder and Scully are driving to Georgia to investigate “Big Blue,” a giant reptile reported in one of the local lakes. Mulder leaves the office at 8:30 a.m. averaging 65 mph. Scully leaves at 9:00 a.m., following the same path and averaging 68 mph. At what time will Scully catch up with
It took Charmaine 3.6 hr to drive to her mother’s house on Saturday morning for a weekend visit. On her return trip on Sunday night, traffic was heavier, so the trip took her 4 hr. Her average rate on Sunday was 5 mph slower than on Saturday. What was her average rate on Sunday?
Lois and Clark are covering separate stories and have to travel in opposite directions. Lois leaves the Daily Planet building at 8:00 a.m. and travels at 35 mph. Clark leaves at 8:15 a.m. and travels at 40 mph. At what time will they be 140 mi apart? Lois Clark Rate Time Distance
Solve each inequality. Graph the solution set, and write it using interval notation. 4x + 1 ≤ -31
On an automobile trip, Laura maintained a steady rate for the first two hours. Rush-hour traffic slowed her rate by 25 mph for the last part of the trip. The entire trip, a distance of 125 mi, took 2,1/2 hr. What was her rate during the first part of the trip?
Johnny leaves Memphis to visit his cousin Anne, who lives in the town of Hornsby, Tennessee, 80 mi away. He travels at an average rate of 50 mph. One-half hour later, Anne leaves to visit Johnny, traveling at an average rate of 60 mph. How long after Anne leaves will it be before they meet?
Two steamers leave a port on a river at the same time, traveling in opposite directions. Each is traveling 22 mph. How long will it take for them to be 110 mi apart? Rate Time Distance t First Steamer Second Steamer 22 XXXXXXXXXX 110
Solve each inequality. Graph the solution set, and write it using interval notation. -1.3x = -5.2
For each event, find the rate on the basis of the information provided. Use a calculator and round answers to the nearest hundredth. All events were at the 2016 Summer Olympics in Rio de Janeiro, Brazil. Event 400-m run, men Winner Wayde van Niekerk, South Africa Time 43.03 sec
Solve each inequality. Graph the solution set, and write it using interval notation. 2 3 -x ≤ 12
For each event, find the rate on the basis of the information provided. Use a calculator and round answers to the nearest hundredth. All events were at the 2016 Summer Olympics in Rio de Janeiro, Brazil. Event 200-m run, men Winner Usain Bolt, Jamaica Time 19.78 sec
Solve each inequality. Graph the solution set, and write it using interval notation. 3 4 x ≥ 30
The perimeter of a rectangle is 43 in. more than the length. The width is 10 in. Find the length of the rectangle.
For each event, find the rate on the basis of the information provided. Use a calculator and round answers to the nearest hundredth. All events were at the 2016 Summer Olympics in Rio de Janeiro, Brazil. Event Winner 400-m hurdles, women Dalilah Muhammad, United States Time 53.13 sec
Solve each inequality. Graph the solution set, and write it using interval notation. −5x> 25
The perimeter of a triangle is 34 in. The middle side is twice as long as the shortest side. The longest side is 2 in. less than three times the shortest side. Find the lengths of the three sides.
For each event, find the rate on the basis of the information provided. Use a calculator and round answers to the nearest hundredth. All events were at the 2016 Summer Olympics in Rio de Janeiro, Brazil. Event Winner 100-m hurdles, women Brianna Rollins, United States Time 12.48 sec
Solve each inequality. Graph the solution set, and write it using interval notation. -4x < 16
If the lesser of two consecutive odd integers is doubled, the result is 7 more than the greater of the two integers. Find the two integers.
Solve each inequality. Graph the solution set, and write it using interval notation. 2x > -10
Solve each inequality. Graph the solution set, and write it using interval notation. 4x < -16
Find the measure of each marked angle. (10r + 7)° - +7)° (7x + 3)º
The sum of the least and greatest of three consecutive integers is 32 more than the middle integer. What are the three integers?
For a high school production of Hello, Dolly!, student tickets cost $5 each and nonstudent tickets cost $8 each. If 480 tickets were sold and a total of $2895 was collected, how many tickets of each type were sold?
In 2018, general admission to the Art Institute of Chicago cost $25 for adults and $19 for children and seniors. If $32,972 was collected from the sale of 1460 general admission tickets, how many adult tickets were sold?
In the 19th century, the United States minted two-cent and three cent pieces. Frances has three times as many three-cent pieces as two-cent pieces, and the face value of these coins is $2.42. How many of each denomination does she have?
Solve each inequality. Graph the solution set, and write it using interval notation. 5x+6
Hussein collects U.S. gold coins. He has a collection of 41 coins. Some are $10 coins, and the rest are $20 coins. If the face value of the coins is $540, how many of each denomination does he have? 36있다.
Solve each inequality. Graph the solution set, and write it using interval notation. x-3≥7
Solve each inequality. Graph the solution set, and write it using interval notation. 3k + 1 > 22
Nana found some coins under her sofa pillows. There were equal numbers of nickels and quarters and twice as many half-dollars as quarters. If she found $2.60 in all, how many of each denomination of coin did she find? Number of Coins X X 2x Denomination (in dollars) 0.05 0.50 XXXXXXXXXX Value (in
A certain metal is 20% tin. How many kilograms of this metal must be mixed with 80 kg of a metal that is 70% tin to obtain a metal that is 50% tin? Kilograms of Metal Percent (as a decimal) 0.20 0.50 Kilograms of Tin
In Canada, $1 coins are called “loonies” because they have a picture of a loon on the reverse, and $2 coins are called “toonies.” When Marissa returned home to San Francisco from a trip to Vancouver, she found that she had acquired 37 of these coins, with a total value of 51 Canadian
A student solved the following inequality incorrectly as shown.Give the correct solution set. -2x < -18 - 2x - 18 풍을 -2 -2 x < 9 Solution set: (-∞, 9)
Solve each inequality. Graph the solution set, and write it using interval notation. x 4 ≥ 12
A student solved the following inequality incorrectly as shown.Give the correct solution set. 4x = -64 4x 4 -64 4 x < -16 Solution set: (-∞, -16]
The top-grossing domestic movie in 2016 was Finding Dory. On opening weekend, one theater showing this movie took in $20,520 by selling a total of 2460 tickets, some at $9 and the rest at $7. How many tickets were sold at each price?
Joshua has a sheet of tin 12 cm by 16 cm. He plans to make a box by cutting equal squares out of each of the four corners and folding up the remaining edges. How large a square should he cut so that the finished box will have a length that is 5 cm less than twice the width? | ㅏ 12 -16-
A student was asked to find the number of nickels and dimes that have a value of $1.45. The total number of coins is 21. Letting x represent the number of nickels, the student wrote the following equation.Write the correct equation and solve the problem. 0.05x + 0.10(x - 21) = 1.45
Otis has a box of coins that he uses when he plays poker with his friends. The box contains 44 coins, consisting of pennies, dimes, and quarters. The number of pennies is equal to the number of dimes. The total value is $4.37. How many of each denomination of coin does he have in the box? Number of
A cashier has a total of 126 bills in fives and tens. The total value of the money is $840. How many of each denomination of bill does he have?
Ahmad works at an ice cream shop. At the end of his shift, he counted the bills in his cash drawer and found 119 bills with a total value of $347. If all of the bills are $5 bills and $1 bills, how many of each denomination were in his cash drawer?
In 2016, the number of films released in U.S. and Canadian movie theaters was 161 more than the number of films released in 2009. A total of 1275 films were released in both years. How many films were released each year? 0
Atlanta and Cincinnati are 440 mi apart. John leaves Cincinnati, driving toward Atlanta at an average rate of 60 mph. Pat leaves Atlanta at the same time, driving toward Cincinnati in her antique auto, averaging 28 mph. How long will it take them to meet? Cincinnati John 440 mi Pat Atlanta
A high level of triglycerides in the blood also increases a person’s risk of heart disease. The table shows how triglyceride levels affect risk. If x represents the triglycerides number, write a linear inequality or three-part inequality for each category. Use x as the variable.(a) Normal (b)
A high level of LDL cholesterol (“bad cholesterol”) in the blood increases a person’s risk of heart disease. The table shows how LDL levels affect risk.If x represents the LDL cholesterol number, write a linear inequality or three-part inequality for each category. Use x as the variable.(a)
A pharmacist has 20 L of a 10% drug solution. How many liters of 5% solution must be added to obtain a mixture that is 8%?
A student was asked to find the measures of the angles of a triangle with degree measures that are consecutive integers. Letting x represent the measure of the smallest angle, the student wrote the following equation.Write the correct equation and solve the problem. x + (x + 1) + (x + 2) = 90
Match each inequality in Column I with the correct graph or interval in Column II.-3 < x < 3 A. B. C. (3, 0) E. (-3,3) 0 0 II 3 D. (-, 3] F. [-3,3]
Russell Westbrook of the Oklahoma City Thunder and James Harden of the Houston Rockets were the leading scorers in the NBA for the 2016–2017 regular season. Together they scored 4914 points, with Harden scoring 202 fewer points than Westbrook. How many points did each player score?
A circle has area 25π ft2. What would be the perimeter of a square whose sides each measure the same length as the radius of the circle?
An amount of money is invested at 3% annual simple interest, and $2000 more than that amount is invested at 4%. The total annual interest is $920. How much is invested at each rate?
An equilateral triangle has perimeter 27 in. What would be the area of a square whose sides each measure the same length as the side of the equilateral triangle?
Match each inequality in Column I with the correct graph or interval in Column II.x ≥ 3 A. B. C. (3, 0) E. (-3,3) 0 0 II 3 D. (-∞, 3] F. [-3,3]
Match each inequality in Column I with the correct graph or interval in Column II.-3 ≤ x ≤ 3 A. B. C. (3, 0) E. (-3,3) 0 0 II 3 D. (-∞, 3] F. [-3,3]
Match each inequality in Column I with the correct graph or interval in Column II.x > 3 A. B. C. (3, 0) E. (-3,3) 0 0 II 3 D. (-∞, 3] F. [-3,3]
Match each inequality in Column I with the correct graph or interval in Column II.x < 3 A. B. C. (3, 0) E. (-3,3) 0 0 II 3 D. (-∞, 3] F. [-3,3]
A farmer wishes to enclose a rectangular region with 210 m of fencing in such a way that the length is twice the width and the region is divided into two equal parts, as shown in the figure. What length and width should be used? Width Length
An amount of money is invested at 4% annual simple interest, and twice that amount is invested at 5%. The total annual interest is $112. How much is invested at each rate?
Match each inequality in Column I with the correct graph or interval in Column II.x ≤ 3 A. B. C. (3, 0) E. (-3,3) 0 0 II 3 D. (-∞, 3] F. [-3,3]
A square has perimeter 160 in. What would be the perimeter of an equilateral triangle whose sides each measure the same length as the side of the square?
An electronics store offered a new HD television for $255, which was the sale price after the regular price was discounted 40%. What was the regular price?
Tri traveled from Chicago to Des Moines, a distance of 300 mi, in 10 hr. What was his rate in miles per hour?
After a discount of 28.57%, the sale price for a Samsung Galaxy tablet computer was $199.99. What was the regular price of the tablet computer to the nearest cent?
The distance between Cape Town, South Africa, and Miami is 7700 mi. If a jet averages 550 mph between the two cities, what is its travel time in hours?
What amount of money is found in a coin hoard containing 12 dimes and 18 quarters?
The length of a rectangle is 3 in. more than its width. If the length were decreased by 2 in. and the width were increased by 1 in., the perimeter of the resulting rectangle would be 24 in. Find the dimensions of the original rectangle.
In 2015, the corporations securing the most U.S. patents were IBM and Samsung. Together, the two corporations secured a total of 12,368 patents, with Samsung receiving 2250 fewer patents than IBM. How many patents did each corporation secure? Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Read the
Determine whether each is an expression or an equation. Simplify any expressions, and solve any equations. 1 -x + 3 1 5x 1 2 +7
As of 2017, the lowest temperature ever recorded in South Dakota was -41 °F. Find the corresponding Celsius temperature to the nearest degree.
Translate each verbal phrase into a mathematical expression using x as the variable.The product of 8 and 16 less than a number
A student translated the phrase “the quotient of a number n and 12” incorrectly as 12/n. Give the correct mathematical expression.
A student translated the phrase “the difference of a number x and 7” incorrectly as 7 - x. Give the correct mathematical expression.
In each of the following, translate part (a) As an expression and translate part (b) As an equation or inequality Use x to represent the number.(a) 6 less than a number(b) 6 is less than a number.
In each of the following, translate part (a) As an expression and translate part (b) As an equation or inequality Use x to represent the number.(a) 8 less than a number(b) 8 is less than a number.
Determine whether each is an expression or an equation. Simplify any expressions, and solve any equations. 5(x + 3) - 8 (2x - 6) = 12
Determine whether each is an expression or an equation. Simplify any expressions, and solve any equations. −7(x + 4) + 13(x - 6)
Translate each verbal sentence into an equation, using x as the variable. Then solve the equation.When 75% of a number is added to 6, the result is 3 more than the number. Find the number.
Translate each verbal sentence into an equation, using x as the variable. Then solve the equation.When 2/3 of a number is subtracted from 12, the result is 10. Find the number.
Translate each verbal sentence into an equation, using x as the variable. Then solve the equation.If the quotient of a number and 6 is added to twice the number, the result is 8 less than the number. Find the number.
Translate each verbal sentence into an equation, using x as the variable. Then solve the equation.If the product of a number and -4 is subtracted from the number, the result is 9 more than the number. Find the number.
Translate each verbal sentence into an equation, using x as the variable. Then solve the equation.The sum of a number and -4 is 18. Find the number.
Translate each verbal sentence into an equation, using x as the variable. Then solve the equation.The sum of a number and 6 is -31. Find the number.
The perimeter of a certain rectangle is 16 times the width. The length is 12 cm more than the width. Find the length and width of the rectangle. W W + 12
Translate each verbal phrase into a mathematical expression using x as the variable.The quotient of 9 and five times a nonzero number
The John Hancock Center tapers as it rises. The top floor is rectangular and has perimeter 520 ft. The width of the top floor measures 20-ft more than one-half its length. What are the dimensions of the top floor? The perimeter of the top floor is 520 ft. L L+20 2W-65 W The perimeter of the base is
Translate each verbal phrase into a mathematical expression using x as the variable.The quotient of three times a number and 10
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