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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 207663: I need help with this question.
Solve the equations using the substitution method.
5x+6y=14, -3y+x=7
Click here to see answer by jim_thompson5910(28504)

Question 207859: Find the solution to each systm by the addition (elimination) method.
26. 4s - 5t = 18
6s +10t = -8
I thought i understood this last semester think i an just confusing myself. my answers were t = -2 and s = 7 to me it just doesn't seem right.
Click here to see answer by Alan3354(30983)

Question 207882: Find the constant value of k so that the line having equation
y =-3/4 x+k is tangent to the circle whose equation is (x-3)^2+(y+4)^2 = 25.
Click here to see answer by Theo(3458)

Question 207946: if possible, solve each system of equations. use any method. if there is not a unique solution to a system state a reason.
3x-11y=9
-9x+33y=18
I want to make sure my reason is right i put no solution equation is dependent.
Click here to see answer by jim_thompson5910(28504)

Question 207939: solve system using addition method
-6x+y=6
-24x-4y=24
solution
(?,?)
Click here to see answer by checkley77(12569)

Question 207938: solve system using addition method
x+2y=20
5x-2y+16
solution
(?,?)
Click here to see answer by checkley77(12569)

Question 207937: solve system using substution method
5x+y=2
5y=x+9
solution ?/26,47/?
Click here to see answer by rfer(12647)

Question 207937: solve system using substution method
5x+y=2
5y=x+9
solution ?/26,47/?
Click here to see answer by MathTherapy(1421)

Question 208021: which expression can be substituted for x in the top equation of the system below to solve the system by substitution?
2x+10y=1
x-4y=-4

Click here to see answer by stanbon(57246)

Question 207947: Twice one number minus a second number is five. Twice the second number plus the first number is eight. Find the numbers.
Click here to see answer by Theo(3458)

Question 207711: Solve for X, Y, and Z in the following systems of three equations using either substition or elimination methods:
a. X + 2Y + Z = 6
X + Y = 4
3X + Y + Z = 8
b. 10X + Y + Z = 12
8X + 2Y +Z = 11
20X - 10Y - 2Z = 8
c. 22X + 5Y + 7Z = 12
10X + 3Y + 2Z = 5
9X + 2Y + 12Z = 14

Click here to see answer by pjalgeb(9)

Question 208092: if the first three digits of someones phone number (do not include area code) are 555, how many different phone numbers could they have?
Click here to see answer by Alan3354(30983)

Question 208094: x + y = 16
x-y=-2
What is the solution of this system?
Click here to see answer by jim_thompson5910(28504)

Question 208091: a hockey team has red sweater, white swearter, and blue sweater. the team uses red or blue pants and red or white socks. find the number of possible uniforms
Click here to see answer by checkley77(12569)

Question 208209: SYSTEM OF 3 EQUATIONS WITH 3 UNKNOWNS

FIND SOLUTION SET FOR THE FOLLOWING SYSTEM OF EQUATIONS:
X -Y +5Z = 2
4X -3Y +5Z = 3
3X -2Y +4Z = 1

Click here to see answer by pjalgeb(9)

Question 208239: Find the slope and intercept of the line 3x – 2y = -8.

Click here to see answer by Alan3354(30983)

Question 208242: Write a system of two equations in two unknowns. Solve the system by using the addition method. « Mike paid $2.98 for three doughnuts and two coffees. The next day, he paid $1.64 for two doughnuts and one coffee. How much does it cost for one doughnut and one coffee? »

Click here to see answer by checkley77(12569)

Question 208241: Write a system of two equations in two unknowns. Solve the system by using the substitution method. « Bill and Sue together earn $76,433 per year. If Bill earns $15,000 less than twice Sue’s salary, then how much does each person earn per year? »

Click here to see answer by checkley77(12569)

Question 208238: Find the equation of the line through the points (4, -1) and (2, -7). Write the equation in standard form with only integers
Click here to see answer by checkley77(12569)

Question 208401: 8x-6y=17
y=4/3x+2

Click here to see answer by HyperBrain(694)

Question 208373: Rewrite each expression without parentheses.
a.3(x+7)
Click here to see answer by rfer(12647)

Question 208504: I am really having trouble transferiing this question from words to the actual problem please help,
Find 2 consecutive odd integers such that twice the greater is 17 more than the lesser.
Click here to see answer by stanbon(57246)

Question 208493: how do i solve for 3x+5=8
Click here to see answer by stanbon(57246)

Question 208491: how many solutions will this linear system have y=3x+8 and y=3x+2
I have no idea how to solve this so coule you please go step by step in sloving that way i can understand it and be able to solve more problems like this one.
Thanks
Click here to see answer by Alan3354(30983)

Question 208501: Solve the linear system: 2x + 7y = 41, 2y = 3x + 1
Click here to see answer by checkley77(12569)

Question 208564: what is the slope intercept form?
3x+7=0
Click here to see answer by stanbon(57246)

Question 208616: -12xz/(3y)+12z (squared)/x
x=-4 y=-2 z=1\2
my answer came out to negative one but my teacher marked that problem as wrong too!i solved the top part which is everything before /x in my TI calculator and then divided it by x which equals -4
and still got the answer wrong can you help me???
Click here to see answer by Alan3354(30983)

Question 208611: -3xyz(squared)
x=-4 y=-2 z=1\2
okay when i put this equation in my TI calculator i got 144 but when my teacher checked it he said it was wrong can you show me how to solve this problem? and what the correct answer would be PLEASE??????
Click here to see answer by nerdybill(6950)

Question 208615: 3. Translate the problem into a pair of linear equations in two vaiables. Solve the equations using either elimination or substitution. State your answer for both variables.
The perimeter of a rectangle is 48 cm. The length is 12 cm longer than the width. Find the dimensions.
Click here to see answer by algebrapro18(206)

Question 208729: How do I factor 2x^2+4x+3=0? Your help is greatly appreciated!
Click here to see answer by scott8148(6628)

Question 208702: S = 5NT - TS + NS
Solve for T
Click here to see answer by scott8148(6628)

Question 208771: Each equation in a system of linear equations has infinitely many ordered pair solutions does this make sense.
Click here to see answer by DRichardson(63)

Question 208711: 30,000 people attended a ballgame at a stadium that offers two kinds of seats: general admission and reserved. The day's receipts were $201,000. How many people paid $13.00 for reserved seats, and how many paid $4.00 for general admission?
Click here to see answer by checkley77(12569)

Question 208860: 4.) 5x+a=y how solve for a
5.) m=6(p+q) how to solve for q
8.) w=3(x+y+z) how to solve for y
9.) 2w-8y=z how to solve for y
Click here to see answer by stanbon(57246)

Question 208863: Please demonstrate how to solve the following equations by the substitution method:
y=x+3
2x+y=15
Click here to see answer by Alan3354(30983)

Question 208973: Find the ratio a:c if a:b= 1:2, b:d = 4:5, d:c = 3:1
Click here to see answer by Theo(3458)

Question 209179: A coin bank has $37 dollars consisting of quarters and dimes. There are 10 times as many dimes more than 2 times as many quarters. how many quarters and dimes are there
Click here to see answer by rapaljer(4667)

Question 208974: When I am as old as my father is now, I will five times as old as my son is now. By then, my son will be eight years older than I am now. The sum of my father's age and my age is 100 years. How much older am I than my son?
Click here to see answer by ankor@dixie-net.com(15638)

Question 209247: 1)Two varieties of animal feed contain essential nutrients A and B. Feed I contains 2 units of A and 3 units of B per pound. Feed II contains 2 units of A and 5 units of B per pound. A farmer needs a feed mix that will give his animals a minimum of 16 units of A and 30 units of B. If Feed I costs $3 per pound and Feed II costs $4 per pound, how much of each should be bought to supply the proper nutrition while minimizing cost? Write the objective function and system of linear inequalities and solve it graphically using the method of corners.

Click here to see answer by stanbon(57246)

Question 209313: Is y=-5x linear or nonlinear

Click here to see answer by Alan3354(30983)

Question 209333: if possible, find the solution of y=x+2z,z=-1-2x and x=y-14
Click here to see answer by stanbon(57246)

Question 209246: 1)K.L. Manufacturing wants to maximize its profit on products A and B. The profit on one unit of Product A is $40, while the profit on Product B is $20. Each unit of Product A requires 10 hours of assembly time and 2 hours of finishing time, while each unit of Product B requires 2 hours of assembly time and 4 hours of finishing time. The departmental capacity (in total hours) is 20,000 for assembly and 31,000 for finishing. What is the maximum profit, and how many of each product should be produced to achieve that profit? Write the objective function and system of linear inequalities and solve it graphically using the method of corners.
Click here to see answer by Theo(3458)

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