# Questions on Algebra: Average answered by real tutors!

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 Algebra: Average Solvers Lessons Answers archive Quiz In Depth

 Question 181904: (2a^6 b^3)(3^2 a^-2 b^5)/36a^4 how do you handle the two sections of the brackets? how do you calculate them? Click here to see answer by ankor@dixie-net.com(15746)

 Question 181928: Average Rate= -3 Find the average rate in terms of a, over the given x-values. f(x)=1/x x=1, x=a My attempt: f(x2) - f(x1)/x2-x1 Click here to see answer by stanbon(57962)

 Question 182255: the average of x,y, and z is 80. IF two of the numbers are 74 and 78, then what is the other number? Click here to see answer by solver91311(17077)
 Question 182255: the average of x,y, and z is 80. IF two of the numbers are 74 and 78, then what is the other number? Click here to see answer by stanbon(57962)

 Question 182868: what is the hourly wage for 34k/year? saxon algebra 2--pg.122 Click here to see answer by nerdybill(7003)

 Question 182883: what would be the ballpark weekly pay for one who earns 34k/year? saxon algebra 2---p.120 Click here to see answer by Alan3354(31518)

 Question 182927: 8. A student averages 84 on five tests. If the student received grades of 84, 82, 81, and 79 on the first four exams, what grade did the student receive on the fifth exam? Click here to see answer by Mathtut(3670)

 Question 183041: Please help. Question from text. On three examinations, you have grades of 88,78, and 86. There is still a final examination, which counts as one grade. In order to get an A, your average must be at least 90. If you get 100 on the final, compute your average and dertermine if an A int he course is possible. Thank you.... Click here to see answer by jim_thompson5910(28715)

 Question 183117: this one has me stumped. I don't know why, I usually can get averages, but my mind is stuck here: 8. The final grade for a particular course is calculated by dividing total points earned by total points available. There are 120 points available in the first half of the course, and 140 points in the second half of the course. If a student earns 81% in the first half of the course, how many points must the student earn in the second half in order to earn an 80% B final grade? thanks for the help. Click here to see answer by Edwin McCravy(8999)

 Question 182881: what would be the ballpark weekly pay for one who earns 34k/year? saxon algebra 2---p.120 Click here to see answer by lizard(7)

 Question 183340: I totally don't understand how to start with this exercise. I am supposed to find the center and radius of a circle that is represented in this equation... (x-9)^2 + (y+1)^2 = 49 Click here to see answer by vleith(2825)

 Question 183343: I have to determine g(6). i have piecewise functions: g(x) = 7+x for x<5 = 7-x for x>=5 all I have to do is replace 6 for x? So i would have g(6) - 7+6 = 13 and g(6) = 7-6=1 How do I continue? Click here to see answer by vleith(2825)

 Question 183341: I would like to know if it is correct that the domain of x-4/2x-3 would be (-infinity, 4) U (4, infinity) Click here to see answer by vleith(2825)

 Question 183337: x(x-6) = 7 If I solve it: x^2-6x = 7 how do i continue from here? It is solving an equation but how do i reach x= ? Click here to see answer by vleith(2825)

 Question 183536: If Sam can do a job in 4 days that Lisa can do in 6 days and Tom can do in 2 days, how long would the job take if Sam, Lisa, and Tom worked together to complete it? Click here to see answer by stanbon(57962)

 Question 183638: A sailboat travels 20 miles downstream in three hours. It returns in four hours. Find the speed of the sailboat in still water AND the rate of the current. Click here to see answer by halbren(10)

 Question 183993: The average of 8, 6, 9, 12 and 4x is x. What is the value of x? Leonardo earns \$100 for each oil painting. His expenses are \$75 for start-up plus \$35 per painting. How many paintings does he have to paint to break even? Click here to see answer by solver91311(17077)

 Question 184301: i dont understand algebra at all. can u help me. Click here to see answer by stanbon(57962)

 Question 184527: Sue's average for 9 games of bowling is 108. What is the lowest score she can receive for the tenth game to have an average of 110? Click here to see answer by checkley77(12569)

 Question 184655: Solve x2 + 16x + 69 = 6 Click here to see answer by solver91311(17077)

 Question 186964: Solve. 2x2 – 7x – 2 = 0 Click here to see answer by uday1435(57)

 Question 187036: A rectangular garden is to be surrounded by a walkway of constant width. The garden's dimensions are 30 ft by 40 ft. The total area, garden plus walkway, is to be 1800 ft2. What must be the width of the walkway to the nearest thousandth? Click here to see answer by feliz1965(151)

 Question 187319: Colin invested \$13,000, part at 15% and part at 10%. If the total interest at the end of the year is \$1,900, how much did he invest at each rate? Place your answers in the two blanks. Enter the amounts in whole dollars only. Do not use dollar signs, commas, or decimals when entering your values. Amount invested at 15% = _______, Amount invested at 10% = _______ Click here to see answer by stanbon(57962)

 Question 187468: What values for x must be excluded in the fraction: x+2/x^-9x+14 Click here to see answer by Earlsdon(6294)

 Question 187471: solve the system of equations: x+5y= -7 -2x-3y=7 Click here to see answer by jojo14344(1512)

 Question 188178: Hey! i have a question what is the average of: 4.55431234 , 189.984 , and 128592.0904 Click here to see answer by Alan3354(31518)

 Question 189016: quiz scores are 73,75,89 and 91. What scores on a 5th quiz will make the average85? Click here to see answer by solver91311(17077)

 Question 189059: Hey Solving this and find the interval notation, I have one question. I5-8xI>11 (5-8x is written as an absolute value) ALSO I2x-7I<=9 (The 2x-7 is also absolute value) When solving it and leaving absolute value out, does 2x-7 and 5-8x change to 2x+7 since everything coming from absolute value is positive? Click here to see answer by stanbon(57962)

 Question 189058: I have to find the vertex but I don't really understand the steps to it. f(x)=x^2+10x+14 do I have to do x^2 +10x+14-14? the other one is f(x)=-x^2 +6x+20 to find the vertex and to determine if there is a maximum or minimum value and what that value is... the max.value would be k which would be 20 right? and minimum? Anna Click here to see answer by Tutor44(1)
 Question 189058: I have to find the vertex but I don't really understand the steps to it. f(x)=x^2+10x+14 do I have to do x^2 +10x+14-14? the other one is f(x)=-x^2 +6x+20 to find the vertex and to determine if there is a maximum or minimum value and what that value is... the max.value would be k which would be 20 right? and minimum? Anna Click here to see answer by solver91311(17077)

 Question 189149: ROOT:5-x = x-3 do I first set both sides squared to get rid of the root? this again says check all proposed solutions which I don't understand. Click here to see answer by edjones(7569)

 Question 188969: In an experiment to determine which of three different missile systems is preferable, the propellant burning rates were measured. The data after coding is given below. System I 24.0 16.7 22.8 19.8 18.9 System II 23.2 19.8 18.1 17.6 20.2 17.8 System III 18.4 19.1 17.3 17.3 19.7 18.9 18.8 19.3 Use the Kruskal-Wallis test and a significance level of a = 0.05 to test the hypothesis that propellant burning rates are the same for the three missiles. Click here to see answer by manishavbirla(1)

 Question 189148: I should solve this equation 9/(x+1) - 2/(x-2) = 5/(x+1) I can solve it but it says check all proposed solutions! What does it mean? Click here to see answer by vleith(2825)

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