Questions on Algebra: Systems of Linear Equations answered by real tutors!

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 Linear Solvers Practice Answers archive Word Problems Lessons In depth

 Question 393058: I'm struggling to help my 8th grade daughter with her algebra........ this is one.......the solution to which system of equations has a positive y value? 4 choices are listed but this is the one that's supposed to be correct--- y=3x+3 and 2x+3y=0. I keep coming up with a negative value. Can you help? Thank you! Click here to see answer by mananth(12270)

 Question 393082: Please help me solve this problem. Find all solutions (if possible): -4x -y + 2z = -6 -x +2y + 3z = -5 2x -4y - 3z = -5 Click here to see answer by Edwin McCravy(8909)

 Question 393112: write the equation in standard from of the horizontal and vertical lines that pass through the point (2,4) Click here to see answer by ewatrrr(10682)

 Question 393422: Need help with solving this equation 0.3x + 9 ≤ 0.7x - 8 Click here to see answer by mananth(12270)
 Question 393422: Need help with solving this equation 0.3x + 9 ≤ 0.7x - 8 Click here to see answer by MathLover1(6638)

 Question 393431: how do i write an equation of a line when i am given the point and the slope? Click here to see answer by stanbon(57387)

 Question 393435: Bayside insurance offers two health plans. Under plan A, Giselle would pay the first \$50 of her medical bills, plus 25% of the rest. Under plan B, Giselle would pay the first \$70, but only 20% of the rest. For whatamount of medical bills will plan B save Giselle money? Assume she has over \$70 in bills. Click here to see answer by mananth(12270)

 Question 393556: If 100-2xy-y^2=x^2, which of the following must be true? a. x-y=10 b. x^2+y^2=100 c. (x+y)(x-y)=100 d. (x+y)^2=100 e. (x-y)^2=100 please explain how to solve this for me, its been awhile. Click here to see answer by richard1234(5390)
 Question 393556: If 100-2xy-y^2=x^2, which of the following must be true? a. x-y=10 b. x^2+y^2=100 c. (x+y)(x-y)=100 d. (x+y)^2=100 e. (x-y)^2=100 please explain how to solve this for me, its been awhile. Click here to see answer by mananth(12270)

 Question 393565: I need to determine the slope and y-intercept of the following equation 2x+3y=5 I believe the slope is 2x and that the y intercept is 3y but I am not sure. Thank you Click here to see answer by rfer(12670)

 Question 393589: The cost of a membership to a health club has an initiation fee and monthly dues. If the club charges \$100 for 2 months and \$200 for 6 months, then find the initiation cost and the monthly dues fees. Click here to see answer by robertb(4012)

 Question 393909: I am having a very hard time solving these types of questions and have spent the last two hours on one question and each time I get it wrong it gives me a new one to solve and I keep getting them wrong. Please help me understand what it is I am not doing correctly. Thank you. I need to find the equation of the line containing the given point and parallel to the given line. Use y=mx+b form Here is one of the questions (7,9) x+6y=7 I know I then have to put it into y-y=m(x-x) form but when the x or y is by itself I do not know what to do. Click here to see answer by solver91311(16897)

 Question 393904: Solve the system of linear equation using inverse matrices. 2x-3y=-2 3x-4y=9 Click here to see answer by pie90010(44)

 Question 394072: The surface area S of a right prism is given by S = 2B + Ph, where B is the area of the base, P is the perimeter base, and h is the height of the prism Solve for B. Click here to see answer by pie90010(44)

 Question 394046: I am to solve the linear system by graphing for the equation 2x-2y=2 and 2x-y=6. I know I have to get y by it self to have it in y intercept form. This is where I am having problems. can you help. Click here to see answer by solver91311(16897)

 Question 394067: Simplify the following expression. -4(-6v + u) + 3 (-6u - 2v) Click here to see answer by rfer(12670)

 Question 394066: Evaluate. 2 * 3 - ((-1)^2 - 4)^2 Click here to see answer by rfer(12670)

 Question 394327: If y= 4x - 5 and 5y = kx - 25 are equivalent linear equations, what is the value of k? Click here to see answer by ewatrrr(10682)

 Question 394381: Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 8x + 10y = 92 24x + 11y = 162 Click here to see answer by jim_thompson5910(28598)

 Question 394425: Subtract the lower expression from the upper one. dy+az ey-bz _____________ Click here to see answer by jim_thompson5910(28598)

 Question 394455: The point (17, 0) lies on the line 8x + 11y = 136. Determine if this point is a solution of the system 8x + 11y = 136 0x – y = -8 Click here to see answer by robertb(4012)

 Question 395130: what do the equations 3x - 2y = 3 and -3x + 2y = 2 have in common Click here to see answer by stanbon(57387)

 Question 395189: Amy paid \$89.65 for a pair of running shoes during a 15%-off sale. What was the regular price? Click here to see answer by mananth(12270)

 Question 395268: 7[3m - (m + 2)] > -6(m - 3) Click here to see answer by stanbon(57387)

 Question 395302: solve by addition, indicate whether each system is independent, dependent or inconsistent. -3x + 3y= -20 2x - 3y = 7 Click here to see answer by jim_thompson5910(28598)