# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 181238: Hi. May I have some help solving each system graphically if possible? {2x=5y-11 3x=2y thanks H.C. Click here to see answer by Alan3354(30993)

 Question 181720: Use Substitution to solve each system of equations. If the system does not have exactly one solution, state whether it has no solution or infinitely many solutions. 1/2x+2y=12 and x-2y=6 Click here to see answer by ankor@dixie-net.com(15652)

 Question 181721: Use Substitution to solve each system of equations. If the system does not have exactly one solution, state if it has no solution or infinitely many solutions. x-5y=36 and 2x+y=-16 Click here to see answer by eperette(173)

 Question 181985: I am trying to help my duahgter with her pre-algebra. Her paper only states the following: y = 2x-5 x-y = 2 She does not know the formula to figure this out. I have forgotten...can you please help us? Click here to see answer by nerdybill(6958)

 Question 182077: Matrices Hello I'm needing some help with my homework that asks me to use the matrices to solve each system of equations. If a system has no solution, so indicate. {x-y+z=2 x+2y-z=6 2x-y-z=3 thanks Haley Click here to see answer by Alan3354(30993)

 Question 182076: Matrices Hello I'm needing some help with my homework that asks me to use the matrices to solve each system of equations. If a system has no solution, so indicate. {2x-3y=16 -4x+y=-22 thanks Haley Click here to see answer by Alan3354(30993)

 Question 182145: f = p - k ln t; solve for t Click here to see answer by vleith(2825)

 Question 182158: Hello, I'm having some difficulty with the following problem: Use matrices to help find a general solution of each system of equations. { x+z=1 x+y=2 2x+y+z=3 thanks, H.C. Click here to see answer by Fombitz(13828)

 Question 182230: Find two real numbers that have a sum of 8 and a product of 2. Click here to see answer by Earlsdon(6287)

 Question 182155: Hello, I'm needing some help on the following problem: Use matrices to solve each system of equations. If a system has no solution, so indicate. { 2x-3y=16 -4x+y=-22 thanks H.C. Click here to see answer by Fombitz(13828)

 Question 182219: 1/2x^2 + x -1=0 ax^2 + bx + c=0 Click here to see answer by jojo14344(1512)

 Question 182330: Ok, I am having problems trying to figure out what the other 2 solutions are within this problem, I have tried using the quadratic equation formula and I get (3+sqrt71)/10 and its not correct, so could someone please help me figure this out, I would greatly appreciate it. Here is the problem : The equation 5x^4-3x^3-4^2 has three real solutions they are : ____ , 0 ,____ Hint: factor out common factor (yielding one solution), then maybe use quadratic equation to find the others. Click here to see answer by stanbon(57347)

 Question 182369: How do I figure out this question? If sally paints a house in 4 hours and sam does the same house in 6 hours, how long will it take them both to do the same house? Click here to see answer by ankor@dixie-net.com(15652)

 Question 182475: Is the following equation a function? y=x^2-9 Thank you in advance for any help you could give me! I am not grasping the concept of functions AT ALL and it is very frustrating!! thanks again! Click here to see answer by Alan3354(30993)

 Question 182479: Well we are leanring about scientific notation and we have were we have a table and the squares are going up by one and the rubas are going up by times 2 and I need an equation Click here to see answer by Alan3354(30993)

 Question 182495: a homeowner estimates that it will take her 9 days to roof her house. A professional roofer estimates that he could roof the house in 4 days. how long will it take if the homeowner helps the roofer? Click here to see answer by HyperBrain(694)
 Question 182495: a homeowner estimates that it will take her 9 days to roof her house. A professional roofer estimates that he could roof the house in 4 days. how long will it take if the homeowner helps the roofer? Click here to see answer by Alan3354(30993)

 Question 182543: Write the equation of a line in slope-intercept form with the slope of 4/5 and y-intercept (0, -5). Click here to see answer by J2R2R(94)

 Question 182540: Find the slope and the y-intercept of the line represented by the equation: 5x + y = 13 Click here to see answer by Alan3354(30993)

 Question 182537: For the following equation: 3x – y = 4: Find x if y = 2 Find y if x = 1/3 Present the solutions as ordered pairs. Click here to see answer by Mathtut(3670)

 Question 182536: Verify that the ordered pair (3, -3) is a solution to the equation 3x + 4y = -3 Click here to see answer by Mathtut(3670)

 Question 182541: Write the equation of a line in slope-intercept form with the slope of 4/5 and y-intercept (0, -5). Click here to see answer by stanbon(57347)

 Question 182535: Given the following equation, solve for y 4x – 2y = 12 Click here to see answer by Mathtut(3670)

 Question 182562: given: stamps of 0.5, 3, 10 dollar Question: how many stamps from each do i need to have 100 stamps for a total of 100\$ Click here to see answer by ptaylor(2048)

 Question 182824: Write an equation that represents the number of faces in a prism in terms of the number of sides in the base of the prism Click here to see answer by jim_thompson5910(28595)

 Question 182850: a rectangular piece of cardboard is 4times as long as it is wide. you make a box by cutting squares with side length x from the corners of the cardboard and turning up the resulting flaps. write an expression involving x and the original width of the cardboard w that represents the perimeter of the base of the box. then simplify the expression. explain what the possible values of x can be. Click here to see answer by asim(1)

 Question 182893: This is a quesion of two step equations. The perimeter of a triangle is 51cm.The lenghts of its sides are sonsecutive odd integers.find the lenghts of all three sides. Click here to see answer by Earlsdon(6287)

 Question 182891: Find the slope and the y-intercept of the equation y = 9 + 3/7x Click here to see answer by nerdybill(6958)

 Question 182916: Please help me solve this exercise; The directions are, write an equation for each. Passes through (4,10) and is perpendicular to the line 6x-3y=5. I have tried midpoint and point slope formula and I am still stuck. Look forward to hearing from you. Click here to see answer by nerdybill(6958)
 Question 182916: Please help me solve this exercise; The directions are, write an equation for each. Passes through (4,10) and is perpendicular to the line 6x-3y=5. I have tried midpoint and point slope formula and I am still stuck. Look forward to hearing from you. Click here to see answer by solver91311(16885)

 Question 181724: Use Substitution to solve each system of equations. If the system does not have exactly one solution, state if it has no solution or infinitely many solutions. .3x-.2y=.5 and x-2y=-5 thank you Click here to see answer by stanbon(57347)

 Question 182981: 3. I have literally hundreds of questions. I am submitting only a few for help because I want to do the others on my own. My course does not show proper examples of HOW I can do these, that is why I am here. Translate the following problems into algebraic equations. It is not required that you solve the equations; simply translate them. Identify the variables, constants, and coefficients in each equation 42 is 40% of what number? thank you! Click here to see answer by nerdybill(6958)

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