# 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 378876: Solve the system by linear combination. 3x + 4y = 19 3x + 6y = 33 Click here to see answer by Alan3354(30962)

 Question 379405: if a caterer charges a fixed cost for preparing a dinner plus an additional cost for each person served and you know that the cos will be for 100 students will be \$750 and the cost for 150 students will be \$1050,what would the caterer's fixed cost and the cost per student be?(using linear equations) Click here to see answer by stanbon(57222)

 Question 379446: b) A family of 2 adults and 3 kids go and watch a movie. The price of an adult ticket is m and the price of a child ticket is n such that: 2m + 3n = 28 and n = 12 - m I thought I would solve it by simply doing 2m+3(0)=28 and then solve for n the same but this is not working out. 2m=28 m=14 Click here to see answer by rapaljer(4667)

 Question 379503: An algebra teacher drove by a farmyard full of chickens and pigs. The teacher happened to notice that there were a total of 100 heads and 270 legs. How many chickens were there? How many pigs were there? Click here to see answer by ptaylor(2048)

 Question 379760: The Everton college store paid \$1644 for an order of 44 calculators. The store paid \$9 for each scientific calculator. The other, all graphic calculators, cost the store \$57 each. How many types of each calculator was ordered? Click here to see answer by Edwin McCravy(8880)

 Question 380048: determine whether each of the following ordered pairs are solutions to the linear equations given (-3,-8):y=5x+7? (3,4):5x-2y=6 Click here to see answer by rfer(12644)

 Question 380592: determine whether or not the following given ordered pairs, labeled a,b and c are solutions to the given equations. y=3x-1 A.(1,2) B.(-1,-4) C.(2,3) how do I do this? Click here to see answer by stanbon(57222)

 Question 380598: Find the missing component in each ordered pair using the given equation. y=2x+1 A.(1,_) B.(2,_) C.(_,-3) D.(_,-5 Click here to see answer by rfer(12644)

 Question 380797: How do you work out the problem 15t-4>11t-16? Click here to see answer by nerdybill(6948)

 Question 380842: I am so confused. I don't understand how to do the following problem: 4x-2y=12 directions say Plot the graphs of the following given equations.Use the "X" and "Y" intercept method, and a check point. Use the given "X" value when solving for the check point. Really confused please help me understand. Click here to see answer by rfer(12644)

 Question 380853: uggh.. still don't get this its says plot the graphs of the following given equations. zuse the"X" and "Y" intersept method, and a check point. zuse the "x" value when solving for the checkpoint. 3x+2y=6 x-intercept (_,0) y_intercept (0,_) Checkpoint (1,_) Click here to see answer by stanbon(57222)

 Question 380875: how to solve this equation using substitution method? with checking. 1/x + 1/y=0 2/x + 5/y=-6 Click here to see answer by Fombitz(13828)

 Question 381040: write an equation for each of the following statements and plot the graph of each equation. use the "X" and "Y" intercept method to plot the graph. a checkpoint is not reuired for this section. I really need someone to explain how I do this step by step. This is the statement: The value of y is 3 less than two times the value of x. Equation=___________________________________ x-intercept=(_,_) y-intercept=(_,_) Click here to see answer by stanbon(57222)

 Question 381089: I need help to solve by substitution method for 6m+n=46, m-9n=81. Thanks! Click here to see answer by stanbon(57222)

 Question 381350: how can i graph the system of 2x-2y=-4 and 4x-4y=2 and describe its solution? Click here to see answer by stanbon(57222)

 Question 381352: Could someone please help? I need to graph a system of linear inequalities, then test to see what satisfies both. Here is the system: x+y>4 x+y<-1 Here's what I have done so far: For Line 1, the first inequality: x-intercept is (4,0) and y-intercept is (0,4) For Line 2, the second inequality: x-intercept is (-1,0) and y-intercept is (0,-1). Ok, both these lines are dashed lines, since neither are equal, and therefore included, so I end up with two parallel dashed lines. My problem: I can't find an answer to satisfy BOTH inequalities, so I don't know what to shade in as "true". Can someone please set me straight and tell me what I am doing wrong? Thank you!!! Click here to see answer by jim_thompson5910(28476)
 Question 381352: Could someone please help? I need to graph a system of linear inequalities, then test to see what satisfies both. Here is the system: x+y>4 x+y<-1 Here's what I have done so far: For Line 1, the first inequality: x-intercept is (4,0) and y-intercept is (0,4) For Line 2, the second inequality: x-intercept is (-1,0) and y-intercept is (0,-1). Ok, both these lines are dashed lines, since neither are equal, and therefore included, so I end up with two parallel dashed lines. My problem: I can't find an answer to satisfy BOTH inequalities, so I don't know what to shade in as "true". Can someone please set me straight and tell me what I am doing wrong? Thank you!!! Click here to see answer by stanbon(57222)

 Question 381756: hello. can you please help me with this problem? Each price covers th ost of the dinner dce under certain conditions. Pan for between 200 and 300 people, th is, x>200 and x<300. Click here to see answer by stanbon(57222)

 Question 381829: How can i graph on a coordinate plane 3x+2y=-6 Click here to see answer by Alan3354(30962)

 Question 381954: Okay well i have to make a word problem for this equation. 2x+y=5 7x+4y=15 I solved both by subsutution and elmination My answers were x=5 y=-5 But i don't know how i can make a word problem with a negative number I really need help. Please and Thank you for you time(: Click here to see answer by mananth(12270)

 Question 382113: write the equation y= x-4 in standard form (Ax+By=C) Click here to see answer by user_dude2008(1861)

 Question 382112: Does the set of ordered pairs satisfy a linear function? set: {(1,8) , (2,6), (3,4) (4,2), (5,0)} Why is it a linear function? Click here to see answer by user_dude2008(1861)

 Question 382185: 2x-3=y Plot the graph of the equation. Use the "X' and "Y" intercept method to plot the graph. show all work. a checkpoint is not required. Please help me understand this I have tried subtracting 3 from each side to get answer but I must be doing something wrong. Click here to see answer by stanbon(57222)

 Question 382470: i need to know how to do somethings such as i have an 85% alcohol solution and a 50%alcohol solution and i need a 65% solution. and i need 55 liters all together. how many liters of each do i need? i have the eqautions x=how many liters of 85% y=how many liters of 50% i have x+y=55 (liters) and i have .85x+.50y= .65 please reply as soon as possible, thank you Click here to see answer by stanbon(57222)

 Question 382807: Write an equation of the line containing the given point and parallel of the given line. Express your answer in the form y=mx+b (5,-7); 7x+2y=3 Click here to see answer by mananth(12270)

 Question 383235: how do i graph the equation -x + 2y =4 Click here to see answer by Alan3354(30962)
 Question 383235: how do i graph the equation -x + 2y =4 Click here to see answer by stanbon(57222)

 Question 382714: Dr. W jogs east at 5.5mph. Thirty minutes later (1/2 hr), Mrs. Dr.W jogs west at 7.25mph. When will they be 25 miles apart? Click here to see answer by ankor@dixie-net.com(15624)