# Questions on Algebra: Average answered by real tutors!

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 Algebra: Average Solvers Lessons Answers archive Quiz In Depth

 Question 482394: Adam tried to compute the average of his 7 test scores. He mistakenly divided the correct sum of all of his test scores by 6, which yielded 84. What is Adams correct average test score? Click here to see answer by Earlsdon(6294)

 Question 482580: 7. Translate the following situation into an equation. Do not solve. The length of the second side of a triangle is four less than three times the length of the first side. The length of the third side is one more than the length of the first side. If the perimeter of the triangle is 37 feet, what is the length of the first side? Click here to see answer by mathstutor494(95)

 Question 482606: fred scored an average of 32 points in the first 3 games of the series.However his average increased after the fourth game to 35. What was his score in game 4 Click here to see answer by ankor@dixie-net.com(15746)

 Question 483029: Kevin's scores on the first four science test are 88, 92, 82, and 94. What score must he earn on the fifth test so that the mean would be 90 Click here to see answer by jorel1380(2518)

 Question 483208: Please help me the average of the highest six paid salaries:(The salary that is stated twice do you add it twice?) \$21,754 \$31,584 \$24,231 \$19,265 \$33,147 \$32,362 \$20,025 \$24,231 \$25,698 \$22,112 Click here to see answer by edjones(7569)

 Question 483398: A man drives x miles the first day, y miles the second day, and z miles the third day. The average mileage covered per day is Click here to see answer by Tatiana_Stebko(1326)

 Question 483551: the average of 5 students is 83. The average of first 2 student is 86. What is the avergae of other 3 students? Click here to see answer by Tatiana_Stebko(1326)

 Question 484149: The area of a rectangle is 45 square cm. If the length is 4 cm greater than the width, what are the dimension of the rectangle? Click here to see answer by chessace(471)

 Question 466124: Rosa is on the school track team and ran the following distances during the past six days 5.6, 4.4, 3.6, 4.2, 5.3, 3.7 If she wantes to run at least a daily average of 4.7 miles over a 7-day period, what is the minimum number of miles she has to run on the seventh day? My answer was 1.4 but the book has a different answer. Click here to see answer by AlgeGirl(1)

 Question 484523: solving the equation of -9(5+r)=18 check the solution. then simplify Click here to see answer by rfer(12730)

 Question 484733: If the average of nine numbers is 7 and the average of seven numbers is 9, then what is the average of all 16 numbers? Click here to see answer by Tatiana_Stebko(1326)

 Question 485229: Joan can weed the garden in 40 min and her mother can weed it in 60 min. How long would it take them working together? Click here to see answer by jorel1380(2518)

 Question 485359: 2 cars start from the same point, but are traveling in opposite directions. Car A has 2 passengers and is traveling at 35 miles per hour and car B has 4 passengers and is traveling at 65 miles per hour. How many hours will it take for them to be exactly 500 miles apart? Click here to see answer by Alan3354(31518)

 Question 485357: Suppose your grades on your first four exams were 78%, 87%, 68%, and 83%. What would be the lowest possible average that your last two exams could have so that your grade in the class, based on the average of the six exams, is at least 77%? Click here to see answer by Alan3354(31518)

 Question 485561: vicky has misplaced one of her algebra quizzes. the scores on the quizzes are 82, 71, 83, 91, and 78. she knows that the mean of all six quiz scores is 79.5. what is the score on the missing quiz? Click here to see answer by John10(267)
 Question 485561: vicky has misplaced one of her algebra quizzes. the scores on the quizzes are 82, 71, 83, 91, and 78. she knows that the mean of all six quiz scores is 79.5. what is the score on the missing quiz? Click here to see answer by Edwin McCravy(8999)

 Question 485575: Please help me figure this out! A person biking uphill travels 15 miles in 1hour. The same person biking downhill travels 15 miles in hour. Find this person's average speed Click here to see answer by Alan3354(31518)

 Question 485885: A total of 50 juniors and seniors were given a mathematics test. the 35 juniors attained an average score of 80 while the 15 seniors attained as average of 70. What was the average score for all 50 students who took the test? Click here to see answer by Theo(3504)

 Question 486160: I have a 200 question test, how many can I miss to get a 90%? Click here to see answer by rfer(12730)

 Question 486077: how do you find the missing number to get a certain average with 5 numbers. Click here to see answer by ankor@dixie-net.com(15746)

 Question 486600: 1. Use the Pythagorean Theorem and the square root property to solve the following problem. Express your answer in simplified radical form. Then find a decimal approximation to the nearest tenth. A rectangular park is 12 miles long and 4 miles wide. How long is a pedestrian route that runs diagonally across the park? Answer in simplified radical form. 2. Each side of a square is lengthened by 1 in. The area of the new square is 121 square inched. Find the length of a side in the original square. Click here to see answer by chessace(471)

 Question 486797: My answer to the following doesn't make sense. Please help. Fixed cost for making specialty coffee drinks is 250.00 plus 0.25 for each drink. I am trying to find the equation and answer for average cost per drink if 100 drinks are sold. Following is what I came up with: c=250.00 + 0.25x (#drinks) c=250 + (0.25 x 100) = 275.00 total cost = 275.00 x 100 drinks = 27,500.00 average cost is total cost divided by number of drinks sold avg cost = 27500.00 divided by 100 = 275.00 This doesn't make sense. Please tell me where I'm erroring. Thank you. Click here to see answer by chessace(471)

 Question 486930: I need help finding all the numbers for which the rational expression id defined 1/v-2. Click here to see answer by richard1234(5390)

 Question 487197: Suppose your grades on your first four exams were 76%, 94%, 66%, and 87%. What would be the lowest possible average that your last two exams could have so that your grade in the class, based on the average of the six exams, is at least 79% Click here to see answer by josmiceli(9817)

 Question 487448: 91 more than the square of a number Click here to see answer by Edwin McCravy(8999)

 Question 487753: Respected Sir , Please help me to solve this question, I will be very grateful for your help If there are two groups with 75 and 65 as harmonic means and containing 15 and 13 observations then the combined HM is given by As the answer given is : 70.36 Please help me to simplify this !!! Click here to see answer by Theo(3504)

 Question 487749: Respected Sir , Please help me to solve this question, I will be very grateful for your help An aeroplane flies from A to B at the rate of 500 km / hour and comes back from B to A at the rate of 700 km / hour. The average speed of the aeroplane is As the answer given is : 583.33km per hour Please help me to simplify this !!! Click here to see answer by stanbon(57967)

 Question 487833: If i have a 88 average and make a 62 on my final which is worth 30% of my grade what is my final grade Click here to see answer by ankor@dixie-net.com(15746)

 Question 488628: During the 1995-6 season, Michael Jordan scored 2491 points in 82 games. Find the average number of points scored per games. Give your answer to 3 significant digits. Click here to see answer by josmiceli(9817)

 Question 489208: Using complete sentences, describe how you would find all possible rational zeros of the polynomial function f(x) = 4x3  5x2 + 9x  6. Be sure to provide the answer in your explanation. Click here to see answer by lwsshak3(6761)

 Question 489659: Select the set of equations that represents the following situation: Mike invested \$604 for one year. He invested part of it at 6% and the rest at 3%. At the end of the year he earned \$29.91 in interest. How much did Mike invest at each rate of interest? (Points : 3) 0.06x + 0.03y = 604; x + y = 29.91 x + y = 604; 6x + 3y = 29.91 x + y = 604; 0.06x + 0.03y = 29.91 0.06 · 604 + 0.03 · 604 = 29.91 Click here to see answer by mananth(12270)

 Question 489658: elect the set of equations that represents the following situation: The sum of two numbers is 73, and their difference is thirty-two less than the smaller number. What are the two numbers? (Points : 3) x + y = 73; y  x = x  32 2y = 73; 73 = x  32 x + y = 73; x  y = 32  x 2x = 73; 73 = x + 32 Click here to see answer by mananth(12270)

 Question 489657: Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 6x + y = 46 6x  y = 38 Click here to see answer by mananth(12270)

 Question 489757: After taking 7 quizzes, your average is 78 out of 100. What must your average be on the next 5 quizzes to increase your average to 83? I know the answer is 90 but I have no idea how to get to that conclusion! HELP A.S.A.P. PLEASE. Click here to see answer by chessace(471)

 Question 490014: The yearly changes in the population of a city for three consecutive years are respectively, 20% increase, 30% increase, and 20% decrease. What is the total percent change from the beginning to the end of the third year? Click here to see answer by stanbon(57967)
 Question 490014: The yearly changes in the population of a city for three consecutive years are respectively, 20% increase, 30% increase, and 20% decrease. What is the total percent change from the beginning to the end of the third year? Click here to see answer by deborabr(181)

 Question 490076: what is the average of these numbers: 85 60 95 78 70 85 69 100 88 60 70 Click here to see answer by stanbon(57967)

 Question 490163: I need help with this problem please.. Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -3x + 4y = 1, -6x + 6y = -3 Click here to see answer by mananth(12270)

 Question 490167: In a science course, you must average 89 for an A. Your first three tests were 75, 95, and 91. After the first three tests, you find that you must average 90 or better on your remaining tests for an A. How many tests do you hae left? Click here to see answer by josmiceli(9817)

 Question 490155: 12 students sit for an exam which has a maximum score of 100. the average of the 12 scores achieved by the students in the sxam was 95. what is the minimum mark a student could haved scored? Click here to see answer by josmiceli(9817)

 Question 490646: On the first 3 tests of his Spanish class, Kevin got an average score of 83. What does he need on the next test to have an overall average of 86? Click here to see answer by josmiceli(9817)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420