# 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 386831: I need to find the slope of the line containing (-9, 1/2) and (-5, 1/2). Click here to see answer by rfer(12666)

 Question 386835: I need to find the slope of 2x-5y+19=0. Thank you Click here to see answer by rfer(12666)

 Question 386996: I am trying to solve this one for homework. y=2+log x y=3/4x+5 Can someone help? I would really appreciate it!! Denise Click here to see answer by stanbon(57379)

 Question 387021: etermine the equation of the line described. Put answer in the slope-intercept form, if possible. Through (-7, -5), perpendicular to 2x + 7y = -49 Click here to see answer by ewatrrr(10682)

 Question 387023: If the point (-3,1/2) lies on the graph of the equation 2x+ky=-11, find the value of k. a. -5/2 b. -34 c. -17/2 d. -10 e. none of the above i came across this and i dont remember?? Click here to see answer by ewatrrr(10682)

 Question 387061: one type of cattle feed is 4% protein while a second type is 13% protein. how many pounds of each type must be mixed to make 45 pounds of mixture that is 10% protein? Click here to see answer by nerdybill(6962)

 Question 387149: use substitution to solve the liner system y=2x-2 and 5x-2y=18 Click here to see answer by rfer(12666)

 Question 387179: Good Evening! I am trying to solve the following by elimination: {9/2x+1/2y=17/2 {x-5/2y=9/2 Thanks! Jim Click here to see answer by stanbon(57379)

 Question 387180: Please help me solve this equation: If 2x + 2y = 10 and y = x + 1, what is the value of x? Thanks! Click here to see answer by stanbon(57379)
 Question 387180: Please help me solve this equation: If 2x + 2y = 10 and y = x + 1, what is the value of x? Thanks! Click here to see answer by gwendolyn(128)

 Question 387261: Is the relationship below linear? Tell how you decided. Write an equation for the linear relationship. x 5 10 15 20 25 30 y 20 30 40 50 50 50 I am completely lost. I tried understanding what my chapter was saying but it is only confusing me more. Am I even on the right track? x/y 5/20 10/30 15/40 20/50 25/50 30/50 x/y .25 .333 .375 .4 .5 .6 Click here to see answer by robertb(4012)

 Question 387678: I need to complete a table for this equation and I am not sure how to do so. y= -1/2x-4 x y (x,y) -1 -2 Thank you! Click here to see answer by stanbon(57379)
 Question 387678: I need to complete a table for this equation and I am not sure how to do so. y= -1/2x-4 x y (x,y) -1 -2 Thank you! Click here to see answer by Alan3354(30993)

 Question 387695: is X=22 linear or non-linear or not a function? Click here to see answer by jim_thompson5910(28598)

 Question 387708: Solve the formula for T k = c + Tm Click here to see answer by user_dude2008(1861)

 Question 387698: Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions. 2x2 + 6x – 7 = 0 Click here to see answer by robertb(4012)

 Question 387754: A labourer is engaged for 20 days on the condition that he will receive Rs 60 for each day he works and will be fined Rs 5 for each day he is absent. If receives Rs 745 in all, for how many days did he remain absent? Click here to see answer by Earlsdon(6287)

 Question 387815: solve the lnear equatin by using elimnation x+5y=28 -x-2y=-13 Click here to see answer by Alan3354(30993)

 Question 387981: solve by the substitution method. 2x - 7y=15 5x + 45=y Click here to see answer by jsmallt9(3296)

 Question 388139: What are the solutions for x,y, and z in the following equations: x-y+9z=-27 2x-4y-z=-1 3x=6y-3z=27 Click here to see answer by Fombitz(13828)

 Question 388226: TO SOLVE FOR THE TRHEE UNKNOWNS X,Y,Z FROM Z=4*(X+Y) Z=2*X*Y Click here to see answer by Fombitz(13828)

 Question 388335: Solve by the elimination method 2r-5s=-33 5r+2s=48 I think the answer is that there is no solution but I am not sure. Please someone help me to solve this Click here to see answer by jim_thompson5910(28598)

 Question 388475: Find the value of |1 2 -1||3 -2 1||0 1 -3| A. 26 B. 22 C. -16 D. 20 Thank you so much!!! Click here to see answer by Alan3354(30993)

 Question 388478: Find the inverse of [3 1][-4 1], if it exists. A. does not exist B. 1/7[1 3][4 -1] C. 1/7[1 -1][4 3] D. 1/7[-3 -4][1 -1] Thank you so much!!! God Bless and Happy Holidays!!!! Click here to see answer by Jk22(389)

 Question 388489: Which is the graph of the system: y<=0, x<=0, x>=y, x+y>=-4 Click here to see answer by Fombitz(13828)

 Question 388492: Find the maximum and minimum values of f(x,y)=2y+x for the polygonal convex set determined by this system of inequalities. x>=1, y>=0, x<=4-y A. minimum: 1; maximum: 4 B. minimum: 0; maximum: 5 C. minimum: 1; maximum: 7 D. minimum: 4; maximum: 8 Click here to see answer by Fombitz(13828)

 Question 388474: Find DE if D=[-2 4 6][5 -7 1]and E=[1 -2][0 4][-3 4] A. [-20 44][8 -42] B. [-2 -10][0 -28][-18 -4] C. [-20 8][44 -42] D. [-2 0 -18][-10 -28 -4] Thank you for your help!!! God Bless and Happy Holidays!!! Click here to see answer by Jk22(389)

 Question 388129: 3 squares with the first square's side length is 4 units, the next one to the right has side length of x units and the next square to the right has side length of 9 units. there is a straight line which's coordinates lies on the topleft vertices of each 3 squares. => what is the side length of the middle square? Click here to see answer by CharlesG2(828)

 Question 388539: I need help with the equation 3c +4m = 12.5 Please show how you found the answer. Thank you Click here to see answer by Alan3354(30993)

 Question 388577: Ques. 20 Referring to the graph, write the equation of the horizontal line through the point (3,0). Figure located at this link: http://ppstest2.com/images2/AL5005.jpg I need these answers to be as straightforward as possible. No shown work is needed. *Thank you for all simply put answers* Click here to see answer by solver91311(16897)

 Question 388575: Ques.19 Referring to the figure, write the equation of the horizontal line through the point (0,3). Figure located at this link: http://ppstest2.com/images2/AL5005.jpg I need these answers to be as straightforward as possible. No shown work is needed. *Thank you for all simply put answers* Click here to see answer by solver91311(16897)

 Question 388571: Ques 16. Write an equation in point-slope form of the line that passes through the points (-5,-4) and (7,-5). I need these answers to be as straightforward as possible. No shown work is needed. *Thank you for all simply put answers* Click here to see answer by solver91311(16897)

 Question 388570: Ques.14 Write an equation of a line that is perpendicular to y = 2x + 3 and passes through (3,4). I need these answers to be as straightforward as possible. No shown work is needed. *Thank you for all simply put answers* Click here to see answer by solver91311(16897)

 Question 388567: Ques. 13 Write an equation in slope-intercept form of the line that passes through the points (-2,-1) and (3,5). I need these answers to be as straightforward as possible. No shown work is needed. *Thank you for all simply put answers* Click here to see answer by solver91311(16897)

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