# 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 37719: How do you do y= 2x + 3 using substitution? y= 3x + 1 Click here to see answer by checkley71(8403)

 Question 38088: Solve by the elimination method 0.11x+0.09y=-0.7 0.3x-0.6y=5.7 What is the solution of the system? Click here to see answer by checkley71(8403)

 Question 38085: Solve the system of equations by graphing. y-2x=0 y=4x-1 What is the solution of the system of equations? Click here to see answer by fractalier(2101)

 Question 38216: I can't seem to figure this one out. Any help is appreciated. Thank you! The volume of a cylinder (think about the volume of a can) is given by V = πr2h where r is the radius of the cylinder and h is the height of the cylinder. Suppose the volume of the can is 121 cubic centimeters. a)Write h as a function of r. b)What is the measurement of the height if the radius of the cylinder is 3 centimeters? c)Graph this function. Click here to see answer by fractalier(2101)

 Question 38206: Need Help badly. I don't understand at all. 2) The volume of a cylinder (think about the volume of a can) is given by V = πr2h where r is the radius of the cylinder and h is the height of the cylinder. Suppose the volume of the can is 121 cubic centimeters. a) Write h as a function of r. Answer: Show work in this space. b) What is the measurement of the height if the radius of the cylinder is 3 centimeters? Answer: Show work in this space. c) Graph this function. Show graph here. Click here to see answer by fractalier(2101)

 Question 38205: 1) An open-top box is to be constructed from a 4 by 6 foot rectangular cardboard by cutting out equal squares at each corner and the folding up the flaps. Let x denote the length of each side of the square to be cut out. a) Find the function V that represents the volume of the box in terms of x. Answer: b) Graph this function and show the graph over the valid range of the variable x.. Show Graph here. c) Using the graph, what is the value of x that will produce the maximum volume? Answer. Click here to see answer by fractalier(2101)

 Question 38309: We have threee adults who have collectively have math degress, MBA and a 12 year old with a problem that none of us came arrive at the equation. It reads as folows: The difference of a number from 8 is 3 more than the product of the same number and five. This is a bit of an embarassment as I am visiting my nephew and he is having fun watching us try to dome with this answer. Hope you can help. Thanks Deborah Linsley Click here to see answer by Nate(3500)
 Question 38309: We have threee adults who have collectively have math degress, MBA and a 12 year old with a problem that none of us came arrive at the equation. It reads as folows: The difference of a number from 8 is 3 more than the product of the same number and five. This is a bit of an embarassment as I am visiting my nephew and he is having fun watching us try to dome with this answer. Hope you can help. Thanks Deborah Linsley Click here to see answer by Paul(988)
 Question 38309: We have threee adults who have collectively have math degress, MBA and a 12 year old with a problem that none of us came arrive at the equation. It reads as folows: The difference of a number from 8 is 3 more than the product of the same number and five. This is a bit of an embarassment as I am visiting my nephew and he is having fun watching us try to dome with this answer. Hope you can help. Thanks Deborah Linsley Click here to see answer by askmemath(368)

 Question 38317: what is the answer to y=3x+3 3x+2y=-12 I tried to figure it out and got an answer can you tell me if its right Click here to see answer by Earlsdon(6294)

 Question 38363: What is the solution to x - 0.15x = 680? how do I do this? Click here to see answer by fractalier(2101)

 Question 36680: solve the system of equations 3y-2x=4 and 2y+4x=8 Click here to see answer by Evy(14)

 Question 38521: Sorry if the subject is wrong! My question is: 3x-y= -3/2 4x+y=5 My work: 4x+y=5 -4x -4x From there I get really confused! Thanks for the help! Click here to see answer by Evy(14)

 Question 39124: a^-7/a^-5 Divide and simplify write the equation with a negative exponent, write the equation with a positive exponent. Click here to see answer by fractalier(2101)

 Question 39331: Jill has \$3.50 in nickels and dimes. If she has 50 coins, how many of each type of coins does she have? I need to know an X and a Y. THANK YOU Click here to see answer by Earlsdon(6294)

 Question 39333: This is actually a word problem. A coffee merchant has coffee beans that sell for \$9 per pound and \$12 per pound. The two types are to be mixed to create a 100lb mixture that will sell for \$11.25 per pound. How much of each type of bean should be used in the mixture? Click here to see answer by checkley71(8403)

 Question 39536: solve the pairs of equations using the addition or subtraction method. 3w - 2z = 38 z = 2w - 18 This is as far as I got, but I don't know if it's right. 3w - 2z = 38 2w + z = 18 Click here to see answer by josmiceli(9817)

 Question 39843: `Combine like terms: 6x² + 3x - 2 + 2x² – x + 7` Click here to see answer by AnlytcPhil(1278)

 Question 39845: 32. Determine the coordinates for graphing the equation 3Y + 2X = 4Y – 2 Click here to see answer by fractalier(2101)

 Question 39949: The sum of the digits of a two digit number is 15. If the digits are reversed, the new number is 27 less than the original number. Find the orginal # Click here to see answer by Paul(988)

 Question 39947: A cyclist rode 3 hours with a tail wind of 6km/h. The return trip against the head wind took 5 hours. find the cyclist's speed in still air Click here to see answer by Paul(988)

 Question 39946: Molly is 4 years younger then Heidi. In 3 years, Heidi will be twice as old as Molly. How old are they now? Click here to see answer by Paul(988)

 Question 39948: A jar of nickels and dimes contains \$3.30. There are 27 more nickels than dimes. How many of each are there? Click here to see answer by Nate(3500)

 Question 40466: A roler has some \$4/lb coffee and some \$8/lb coffee that she will mix to make 50 lb of \$5.60/lb coffee. How many pounds of each should be used? Click here to see answer by stanbon(57967)

 Question 40987: Can you please tell me how to work the following problem: x2 - 2x - 24 = 0 Click here to see answer by tran3209(100)

 Question 41327: A ball is thrown vertically upward from the ground wth an initial speed of 80ft/sec. It's height is given by h=80t-16t^2. How high does the ball go? When does the ball hit the ground?---I would really appreciate some help with this question. Thanks!! Click here to see answer by Nate(3500)

 Question 41328: A parking lot is to be formed by fencing in a rectangular plot of land except for an entrance 12m wide along one of the sides. Find the dimensions of the lot with the greatest area. 300 m of fencing is used. Here's another word problem that I'm having some trouble with. Thanks! Click here to see answer by Paul(988)

 Question 41626: A variable z varies jointly with x and the square of y. If z = 6 when x = 4 and y = 3, write the equation of joint variation. Click here to see answer by psbhowmick(529)
 Question 41626: A variable z varies jointly with x and the square of y. If z = 6 when x = 4 and y = 3, write the equation of joint variation. Click here to see answer by venugopalramana(3286)

 Question 41625: Does the equation y/x^2 = 13.9 represent direct variation of one variable with the square of another variable? Write Yes or No. Click here to see answer by venugopalramana(3286)

 Question 42562: I need some help getting the answer on this one: At the beginning of a bicycle race for charity, Roberto and Juana are 30 mi. apart. If they leave at the same time and ride in the same direction, Roberto overtakes Juana in 6 hr. If they ride toward each other, they meet in 1 hr. What are their speeds. Note: The answer is in the back of the book, I just need help in getting to that answer. Click here to see answer by fractalier(2101)

 Question 42961: I GOT HOMEWORK FROM ALGEBRA BUT I DON'T GET IT AT ALL WE ARE LEARNING ON "SOLVING SYSTEMS BY GRAPHING AND SUBSTITUTION" BUT THAT'S THE PART I DON'T GET CAN YALL PLEASE HELP ME? HERE'S ONE OF THE PROBLEMS THEY GAVE ME 3x + 2y=-12 & x + 2y=-2 Click here to see answer by jmg(22)

 Question 43570: Good evening - Can someone help me with the following equation? Find the x-intercepts y = x^2-5x-10 Thank you so much! Click here to see answer by stanbon(57967)

 Question 43587: Using the information given, put each line in Slope-intercept form. Slope 2: 7-intercept; 5 Slope 1/2; x-intercept; 7 Click here to see answer by venugopalramana(3286)