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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 352290: If a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state it.
a-2b=3
3a=6b+9
I have tried working these three seperate times, I cannot figure it out. I am beginning to think there is no solution. Thank you for you're time and assisstance.
Click here to see answer by scott8148(6628)

Question 352272: A page of a school yearbook is 8 1/2 inches by 11 inches. The left and right margins are 1 inch and 2 1/2 inches, respectively. The space between pitures is 1/4 inch. How wide can each picture be to fit 3 across the width of the page?
Click here to see answer by checkley77(12569)

Question 352468: 6y+5x=-6 ?
Click here to see answer by nyc_function(2733)

Question 352572: Solve the system of equations
3x+6y-z=7
3x-3y+5z=-12
9x+9y-2z=12

Click here to see answer by Fombitz(13828)

Question 352577: Each of two brothers can wash a car in 1 hour; however their sister can wash the car in 45 minutes.If all three work together, how long will it take to wash the car?
Click here to see answer by nerdybill(6962)

Question 352010: 100 patients expect a 30% increase in weekly increments, determine the amount of patients per week - father of a sophmore!!! Looking for a formula....
Click here to see answer by sofiyac(695)

Question 352689: Find three solutions of the equations and graph it.
y=-3/2x+2
Click here to see answer by sofiyac(695)

Question 352710: How do I solve this equation...
5x + y = 12
3x + y = 10
Do I add 5x and 3x together to get 8x? And the same with y to get 2y? I am not sure how to work these problems
Click here to see answer by Fombitz(13828)

Question 352717: graph each equation using the intercept method.
15y+5x=-15
Click here to see answer by Fombitz(13828)

Question 352717: graph each equation using the intercept method.
15y+5x=-15
Click here to see answer by sofiyac(695)

Question 352741: graph the line that passes through the given point and has the given slope.
(5.-3) m=3/4
Click here to see answer by Fombitz(13828)

Question 352817: Write the slope intercept form of the equation: x-y=6
Click here to see answer by jim_thompson5910(28595)

Question 351905: Question:Solve the equation find the value of y for each valueof x??
y+3x=8;x=-2,0,2
Click here to see answer by nyc_function(2733)

Question 352895: How do you determine to use subsitution or elimination?
Click here to see answer by nyc_function(2733)

Question 352238: Find the domain and range of the function.
y=x2
Click here to see answer by nyc_function(2733)

Question 353149: Not sure how to solve this problem...
-3x + 2y = -14
5x + 6y = -42

Can anyone help me understand this.. Thank you
Click here to see answer by Fombitz(13828)

Question 353152: -5x = -5y + 75
x = -4y + 25
I am so confused on how to work this problem
Click here to see answer by Alan3354(30993)

Question 353267: Write equation in slope-intercept form.
3x + 2y = 10
Click here to see answer by Fombitz(13828)

Question 353267: Write equation in slope-intercept form.
3x + 2y = 10
Click here to see answer by ewatrrr(10682)

Question 353260: how can i figure this math problem out classroom on one side of the drama building are all numbered with consecutive odd integers. If the first room on this side of the building is numbered d, write an expression in d for the sum of the first seven classroom numbered in a row. then simpilfy this expression.
i dont understand how to do it may u PLEASE explain to me
Click here to see answer by sudhanshu_kmr(1152)

Question 353410: Write the system of linear equations in trian-
gular form
x + y + z = 7
3x + 4y + z = 13
2x − 2y + 9z = 7
What is triangular form and how would I solve this problem using it?
Click here to see answer by stanbon(57377)

Question 353415: "How do you graph this line, using the slope-intercept form
what I have tried:
2y/2=2
1/2/2=?
-10/2=-5
y=?x-5
Click here to see answer by Alan3354(30993)

Question 353415: "How do you graph this line, using the slope-intercept form
what I have tried:
2y/2=2
1/2/2=?
-10/2=-5
y=?x-5
Click here to see answer by edjones(7569)

Question 353471: The sum of the denominator and numerator of a fraction is 14. When 7 is added to each, the resulting fraction has a value of 3/4. What is the original fraction?
Click here to see answer by edjones(7569)

Question 353542: X + Y = 10 , 3X + Y = 12
I need some help trying to figure these problems out can some one please help me
Click here to see answer by mananth(12270)

Question 352702: solve each equation for y, find three solutions of the equation, and then graph it.
2y+x=-2
Click here to see answer by sofiyac(695)

Question 353720: A chemist has one solution that is 80% acid and another that is 30% acid. He needs 200 liters of a solution that is 62% acid. How much of each should be used?
Let x=number of liters of 80% solution
Y= number of liters of 30% solution
Click here to see answer by stanbon(57377)

Question 353734: Please help me solve this. Find the value of k such that the system of linear equations is inconsistent.
4x + 2y = 6
−6x + ky = −8

Click here to see answer by robertb(4012)

Question 353780: two athletes race around a 400-m track oval at a speed of 6 and 8 meters per second, respectively. How long will it take before the faster athlete gains one lap on the slower ones?
Click here to see answer by solver91311(16897)

Question 353817: two groups of tourists traveled by automobiles. One party averaged 45 kilometers per hour and the other 35 kilometers per hour. The faster party traveled 30 km farther than the slower party and made the trip in two hours less time. How long did each party travel?
Click here to see answer by mananth(12270)

Question 353820: an airplane traveling 280 miles per hour was reported over an airfield. Another plane took off from the airfield 6 minutes later and followed the first plane. The second plane's average speed was 320 miles per hour. Assuming the planes did not change speed and direction, how far from the airfield did the second plane overtake the first plane?
Click here to see answer by mananth(12270)

Question 353805: A repair technician charges $80 for the first thirty minutes of each house call plus $2 for each additional minute. The repair technician charged a total of $170 for a job . how many minutes did the repair technician work ?
A 45 min B 55 min C 75 min D 85 min
Click here to see answer by nerdybill(6962)

Question 353867: Use a t-table and find at least three points
y=-2/5x+2
Click here to see answer by ewatrrr(10682)

Question 353990: how would you solve a problem such as:
A rectangular piece of cardboard is made into an open box (that is, it has no top) by cutting a 2-inch square from each corner and turning up the sides. If the original piece of cardboard (before the corners are cut out) has an area of 216 square inches and the completed box has a volume of 224 cubic inches,
determine the dimensions of the piece of cardboard.
Click here to see answer by scott8148(6628)

Question 354067: Two athletes race around a 400-m track oval at a speed of 6 and 8 meters per second, respectively. How long will it take before the faster athlete gains one lap on the slower one?
Click here to see answer by mananth(12270)

Question 354066: i need help solving the Matrix system using lines equation
1 -9/2 3/2
9 8 2
using -9r1+r2 (neg9 times row1 plus row 2)
HOW IN GODS NAME DID THEY GET
1 -9/2 3/2
0 97/2 -23/2

Click here to see answer by Alan3354(30993)

Question 354409: I am trying to explain this to my son, but he is not getting how I am explaining it. Here is the question: The equation y=1.95x + 18 is used to model the relationship between the number of people fed by each farm worker and the time elapsed since 1950. What question is being asked in the equation y=1.95(10) + 18? What is the answer?
Click here to see answer by scott8148(6628)

Question 354418: How many kilograms of nuts must be added to 1.8 kg of plain banana bread batter to produce a batter that is 10 % nuts?
Click here to see answer by Alan3354(30993)

Question 354471: How do you clear a fraction?
Click here to see answer by robertb(4012)

Question 354562: 1. I need help with the following questions. Determine whether the point(1,4) is a solution of the system. Using the subsituting method.
6x + 9y = 42, 5x + 0y = 5
2. The point 1, 9 lines on the line 2x +10y =92. Determine if this a solution.

2x +10y = 92, -6x -2y = -24
3. Use the elimination method. If the system has no solution or an infinite number of solution state this.
-6x -6y = -12, -6x - 7y = 14
4. Use elimination method. If the system has no solution or infinite number of solution state this.
22x + 10y =147, 0x + 2y = -14
Click here to see answer by Alan3354(30993)

Question 354850: solve the system using any algebraic method..
x+y=2
3x-2y=6
Click here to see answer by Fombitz(13828)

Question 354949: what is the x-intercept for the equation: 3x - 7y = 11
Click here to see answer by mananth(12270)

Question 355026: the ten's digit of a two digit number is 3 greater than the unit's digit. if the number is divided by the sum of the digits, the quotient is 6 and the remainder is 8. find the number.
Click here to see answer by stanbon(57377)

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