# Questions on Algebra: Systems of equations that are not linear answered by real tutors!

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 Algebra: Systems of equations that are not linear Solvers Lessons Answers archive Quiz In Depth

 Question 202359: One car travels 13miles per hour faster than another. in the time it takes the slower car to travel 352 miles, the faster travels 456 mile. Find the sped of both cars? Click here to see answer by jim_thompson5910(28595)

 Question 202802: Solve for X,Y and Z X+10Y+Z=52 5X+Y+4Z=15 X+2y-3Z=12 Click here to see answer by PRMath(123)

 Question 203394: the ratio of the tens digit to the units digit of a two-digit number is 1 to 4. the number formed by reversing the digits is 2 less than 3 times the original number. find the original number. Click here to see answer by ankor@dixie-net.com(15652)

 Question 203476: 1. Solve by substitution or elimination method: 3x – 2y = 26 -7x + 3y = -49 2. Solve by substitution or elimination method: 4x – 5y = 14 -12x + 15y = -42 3. Solve by substitution or elimination method: -2x + 6y = 19 10x – 30y = -15 Second set of problems: 1. Plot the graph of the equations 2x - 3y = 5 and 4x - 6y = 21 and interpret the result. 2. Plot the graph of the equations 4x - 6y = 12 and x - 5y = 10 and interpret the result. 3. Plot the graph of the equations 8x - 4y = 12 and -4x + 2y = -6 and interpret the result. Click here to see answer by RAY100(1637)

 Question 203475: 1. Solve by substitution or elimination method: 3x – 2y = 26 -7x + 3y = -49 2. Solve by substitution or elimination method: 4x – 5y = 14 -12x + 15y = -42 3. Solve by substitution or elimination method: -2x + 6y = 19 10x – 30y = -15 Second set of problems: 1. Plot the graph of the equations 2x - 3y = 5 and 4x - 6y = 21 and interpret the result. 2. Plot the graph of the equations 4x - 6y = 12 and x - 5y = 10 and interpret the result. 3. Plot the graph of the equations 8x - 4y = 12 and -4x + 2y = -6 and interpret the result. Click here to see answer by RAY100(1637)

 Question 203493: the tens digit of a 3 digit number is 3. the sum of its digits is 18. if the 10s and 100s digits are reversed, the sum of the new number and the original number is 1008. find the original number. Click here to see answer by stanbon(57347)

 Question 203506: the units digit of a 3 digit number is 5. the sum of its digits is 11. if the units and 100s digits are reversed, the sum of the new number and the original number is 787. find the original number. Click here to see answer by ankor@dixie-net.com(15652)

 Question 203528: A plane can fly at a 1720 miles in 5 hours against the wind at max speed. The same plane can fly 1720 miles in 4 hours with the wind at max speed. What is the speed of the plane with no wind? Let x = max speed, and y = wind speed. Click here to see answer by rfer(12660)

 Question 203494: Solve for x, y,z x +yz = 13 y + zx = 17 z + xy = 19 Click here to see answer by Alan3354(30993)

 Question 205429: What similarities and differences do you see between functions and linear equations? Are all linear equations functions? Is there an instance in which a linear equation is not a function? Create an equation of a nonlinear functions. Click here to see answer by solver91311(16885)
 Question 205429: What similarities and differences do you see between functions and linear equations? Are all linear equations functions? Is there an instance in which a linear equation is not a function? Create an equation of a nonlinear functions. Click here to see answer by stanbon(57347)

 Question 205430: What is the difference between domain and range? Describe a real life situation that could be modeled by a function. Click here to see answer by rfer(12660)

 Question 206368: Find the slope of the line, if it is defined. Through (-7,-2) and (-8,-4) a. Undefined b. -2 c. -1 d. 2 Click here to see answer by Alan3354(30993)

 Question 206584: Rick and Maura work together ans sew a quilt in 4 hrs. Working alone maura wiould need 6 hrs more than rick to sew the quilt. How long would it take each if they worked alone? Click here to see answer by ankor@dixie-net.com(15652)

 Question 209323: Please help me with this problem? I am so confused on word problems.. Thank you so much. Tom and Cathy decide to run a race. Tom can run at 10 meters per second and Cathy can run at 6 meters per second. Tom gives Cathy a 50 meter head start. How long is it before Tom catches Cathy? Type in your numerical answer only (in seconds); Click here to see answer by Alan3354(30993)

 Question 209326: Please help me with the following word problem, I can not do percentages at all and I can not figure out the answer. Thank you so much! A chemist wants to mix a 5% alcohol solution with a 25% alcohol solution to obtain 8 liters of a 20% alcohol solution. How much (in liters) of the 25% solution should she use? Click here to see answer by josmiceli(9680)

 Question 209322: Please help me with this problem, i do not understand it at all, and can not figure out if they made 205.50 total or just from plain...A lady sold two types of pastries at the town's bake sale. Plain pastries were 35 cents each and fruit-filled pastries were 45 cents each. She sold 500 pastries total. How many plain pastries did she sell if she earned \$205.50? Type in your numerical answer only Click here to see answer by stanbon(57347)

 Question 209325: Please help me with the following word problem, I do not know how to do the percentages.. and I can not figure out the answer. thank you so much Nancy had \$18,000 in savings. She invested part of it at 7.5% interest and the rest at 9%. If the total income from the two investments was \$1560, how much did she invest at 9%? Type in your numerical answer only (in dollars) Click here to see answer by checkley77(12569)

 Question 209454: Hi. I am having a hard time solving this problem algebraically and I would appreciate if you could assist me. The problem reads: Click here to see answer by jim_thompson5910(28595)

 Question 211053: I am very confused with the simplex method. Can someone provide details as to how to work out the below? Solve the following standard minimum problem by finding the dual maximum problem and using the simplex method. Minimize: C=29y1+10y2 subject to: 3y1+2y2>=2 5y1+y2>=3 y1>=0, y2>=0 Click here to see answer by stanbon(57347)

 Question 211428: hot to solve this system of linear/non linear equation {x^2+y=8, x-2y=-6 pls Click here to see answer by Theo(3464)

 Question 213267: solve and check system of equations 5) r+s=-6 r-s=-10 10) x+2y=8 x-2y=4 7)c-2d=14 c+3d=9 11)8a+5b=9 2a-5b=-4 Click here to see answer by checkley77(12569)

 Question 213460: I have a question that I have been working on and I am wondering if I am on the right path. The question is as follows: Is the graph f(x) = x^1171 - 5^109 + 3 y-axis symmetric, origin symmetric, or neither one. Explain your answer. When working out the problem and replacing x with -x the reworked problem does not come out the same as the original so it is not y-axis symmetric. Then when I multiple (-1) to both sides it does not come out to be the same as the original problem either. So, I am saying that f(x)=x^11171 - 5^109 +3 is neither y-axis or origin symmetric. Am I right with my analysis? Lori Click here to see answer by stanbon(57347)
 Question 213460: I have a question that I have been working on and I am wondering if I am on the right path. The question is as follows: Is the graph f(x) = x^1171 - 5^109 + 3 y-axis symmetric, origin symmetric, or neither one. Explain your answer. When working out the problem and replacing x with -x the reworked problem does not come out the same as the original so it is not y-axis symmetric. Then when I multiple (-1) to both sides it does not come out to be the same as the original problem either. So, I am saying that f(x)=x^11171 - 5^109 +3 is neither y-axis or origin symmetric. Am I right with my analysis? Lori Click here to see answer by Theo(3464)

 Question 212082: Solve. Round decimal answers to the nearest tenth. 6x+y-5z=65 3x-y-5z=40 2x-5y-4z=9 Please show work and break down so I can understand how to get the proper answer. Click here to see answer by Edwin McCravy(8909)

 Question 214357: Hi again, can anyone show me how to use Gaussian Elimination? I have to use it to solve some of the following eqaution. Help with the whole equation would be most apreciated. Solve the following system of equations by hand. Use the Gaussian Elimination, on the augmeted matrix, and write the row operation you used next to each row. Help with steps and added notes would be really appreciated. -Nick. Click here to see answer by Edwin McCravy(8909)

 Question 215002: In 1992, the life expectancy of males in a certain country was 71.6 years. In 1998, it was 75.1 years. Let E represent the life expectancy in year t and let t represent the number of years since 1992. The linear function E(t) that fits the data is? use the function to predict the life expectancy of males in 2005. Click here to see answer by jim_thompson5910(28595)

 Question 215073: solve this system of equations 4x^2-5xy-y^2=10 2y=1-5x full solution with working would be grateful thank you Click here to see answer by checkley77(12569)

 Question 215878: for a recent job, a plumber earned 28 dollars per hour, and the plumber's apprentice earned 15 dollars per hour. The plumber worked 3 hours more than the apprentice. If together they were paid 213 dollars, how much did they earn? Click here to see answer by checkley77(12569)

 Question 215208: Determine algebraically the point(s) if intersection of the graphs. 2x-y=-1 y=(x^2)+1|x+2| Click here to see answer by jsmallt9(3296)