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

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Question 460646: What is the solution of the system?
5x - y = 27
5x +6y = 13
Is the system consistent or inconsistent?
Are the equations dependent or independent?
Click here to see answer by solver91311(16868)

Question 460867: Find the value of k so that the line has slope m:
6x + ky = 10 and m = -2

Click here to see answer by nerdybill(6948)

Question 461052: solve for x and y.
ax+by=m
{
bx-ay=c
Click here to see answer by MathLover1(6611)

Question 461227: a temp agency offers two payment options for administrative help,option 1-$25 daily plus $10 an hour,option 2-no daily cost but $15 an hour.let x=total hours worked. write a mathematical model reprenting the total temp cost(c),for a four-day temp job in terms of x
Click here to see answer by greek-eng(2)

Question 461204: 0.7(6 − 0.3n) = −2.1
whats the answer
Click here to see answer by rfer(12644)

Question 461454: g(x)= -4x+5, find g(-4)
Click here to see answer by MathLover1(6611)

Question 461793: -5m+6n=-8
-m+3n=-7
how would you solve this using elimatiob by addition?
Click here to see answer by MathLover1(6611)

Question 461811: i need help with the following questions PLEASE!!!!
Solve using the multiplication principle,
1) -2x> 1/9....the solution set x/x ___
2) graph the equation and identify the y-intercept X+Y=-9
4) solve by elimination 4x+5y=5...8x+10y=10
5) solve by substitution 4x+5y=-3...x=4-6y
6)solve 8x-(3x+5)=5 X=__
7) simplify -3[-69-(52-70)]
8) solve the compound inequalities 6>-3x+5 or 9<= -5x+3
9) graph the system of inequalities y>= -3 x>= 5
Click here to see answer by solver91311(16868)

Question 461823: solve by elimination
4x+5y=5
8x+10y=10
Am i suppose to put this into y=mx+b form ?
Click here to see answer by rwm(914)

Question 461825: simplify

what are the steps for this?
Click here to see answer by math-vortex(472)

Question 461824: solve the compound inequalities
6>-3x+5 or 9<= -5x+3
I dont understand this system
Click here to see answer by bucky(2189)

Question 461951: simplify 9t- (3-2t)
Click here to see answer by robertb(4012)

Question 462114: How to solve systems of linear equations such as this one.
4x - y = -4
12 - 3y = 24
Click here to see answer by math-vortex(472)

Question 462094: 6+(-3n+5)=5(7n-3)-9

Click here to see answer by rfer(12644)

Question 462344: Can someone help me solve by the elimination method.
5r – 4s =2
4r +5s = 18
What is the solution?
Click here to see answer by MathLover1(6611)

Question 462679: find the y and x intercepts for -4x+y=11

Click here to see answer by mananth(12269)

Question 462695: solve the systems equations by the substitution method
1. x-5y=14
3x-15y=15
2. 9x+9y=-54
5x-9y=72
3. x-8=y
3x-3y=24
4.x-5y=14
3x-3y=24

Click here to see answer by rwm(914)

Question 462859:
Click here to see answer by pratibha(5)

Question 462853: { 4x-5y=-18
3x+2y=-2
Click here to see answer by Edwin McCravy(8879)

Question 462921: Solve for x and y:
8x+5y=5
7x+10y=-1
Click here to see answer by stanbon(57203)

Question 462921: Solve for x and y:
8x+5y=5
7x+10y=-1
Click here to see answer by MathLover1(6611)

Question 462988: 5x+y=-17
7x-3y=-37
Use the elimination method to solve the system of equations
Click here to see answer by algebrahouse.com(1079)

Question 463111: Given two points on the line, input the equation of the line in standard Ax + By = C. Reduce all fractional answers to lowest terms. (6,1), (5, 4)
Click here to see answer by amoresroy(333)

Question 463113: solve the system of equation
x+y+7z=-7
x+y+2z=-10
x-8y-3z=50
Click here to see answer by juliane1(5)

Question 463364: Solve a system of two equations by using the substitution property of equality
5x-6y=0
y=x
Click here to see answer by algebrahouse.com(1079)

Question 463370: Write each equation in the general linear form: y=-3x+9
Click here to see answer by algebrahouse.com(1079)

Question 463611: 1/x+1/y=8/15
1/x-1/y=2/15
solve the system
I keep getting x=1/3 and y=1/30
Click here to see answer by graphmatics(170)

Question 463611: 1/x+1/y=8/15
1/x-1/y=2/15
solve the system
I keep getting x=1/3 and y=1/30
Click here to see answer by Gogonati(809)

Question 463615: -3x+y=-2
y=-x-6
3x+7y=6
2x+9y+4
radicals and inequalities
quadratic functions
literal equations
exponential functions
Click here to see answer by Alan3354(30924)

Question 463586: determin the equasion of a line tha passes through (6,18) and (-12,3)
Click here to see answer by rfer(12644)

Question 463778: What is y= 2x + 3
Click here to see answer by Alan3354(30924)

Question 464194: Hello,
I think I know how to do problems like these, but I always seem to get problems like this one wrong. Can you help me solve this one? Then maybe I can figure out what I'm doing wrong.
Here's the problem:
3/y+2 + 4/y-3 = 7/y+6
Thanks.
Sarah
Click here to see answer by lwsshak3(6456)

Question 464227: Solve:
x+b/2y=-b^2/4
x-y=-1 where b does not equal to -2
I changed x-y=-1 to y=1+x
then; x+b/2(1+x)=-b^2/4
x+b/2+b/2X=b^2/4
x+b/2x=b^2/4-b/2
thats all I can do...

Click here to see answer by Alan3354(30924)

Question 464478: The difference of two numbers is 14 . The larger number is 3 more than twice the smaller number.Find the numbers.

Click here to see answer by amoresroy(333)

Question 464626: Solve the following systems of equations:
7x-6y= -11
9x-2y= 3
Also, can you please explain how to do a problem like this? That'd be great if you did! Thanks, in advance.
Click here to see answer by nerdybill(6948)

Question 464620: If the difference of two numbers is 49. The larger number is 3 less than 5 times the smaller number. Choose the answer with the correct system of equations used to solve this problem.
a. 5x - 3 = 49 and y - x = 5
b. x - y = 49 and x = 5y - 3
c. y - x = 3 and 5x + y = 49
d. x + y = 49 and 5x + 3 = y

Click here to see answer by Edwin McCravy(8879)

Question 464623: If the sum of two numbers is 42. The second is 10 more than 3 times the first. Find the numbers.
a. 12,30
b. 8,34
c. 12,22
d. 10,32

Click here to see answer by rfer(12644)

Question 464995: on saturday night, the manager of a shoe store evaluates the receipts of the previous week's sales. Two hundred fifty pairs of two different styles of running shoes were sold. One style sold for $75.50 and the other sold for $89.95. The receipts totaled $23,031. The cash register that was supposed to record the number of each type of shoe sold malfunctioned. Can you recover the information? If so, how many shoes of each type were sold?
Click here to see answer by jorel1380(2518)

Question 465060: y=-3x I am supposed to find the ordered pairs for this equation then graph them please explain the steps I am using course compass and it is telling me to substitute "-1" then "2" then "-2" into the equation for x. Is this true for all equations like this? I am confused because just last week he was saying that in order to find the pairs to substitute use zero confused...
Click here to see answer by edjones(7569)

Question 465113: Solve the system:
x-2y=1
2x+3y=23
I get it, but the answer is not coming out for me :( please help me :)
Click here to see answer by algebrahouse.com(1079)

Question 465170: Sir / Ma'am .. i don't know how to check this using substitution method .. it only needs to be checked.. here the problem :
4x+y+1 over 2 =14

Click here to see answer by MathLover1(6611)

Question 465149: Evaluate Dx
-4x+7y=1
25=2x+5y
Click here to see answer by ewatrrr(10682)

Question 465218: 1)A trapezoid has a based of x and height of 3 units. If there is also a square with sides measuring x,what formula would be used to calculate the total area of both figures? ^ this sign means to the power of or exponet
A) 9x
B) x^2
C) 4x+x^3
D) 1x^2+3
2)Evaluate x3y*x2y2
A) 5x3y
B) x to the fifth,y cubed
C) x to the sixth,y squared
D) xy
3)It takes Katrina 3.5 hours to drive from Davenport to Hogsdale and thaen 2 hours and 10 min to drive from Hogsdale to Paqua. On the route that she took,it is 720 miles from Davenport to Paqua. What was her average driving speed for the trip?
A) 100 mph
B) 60 mph
C) 105.5 mph
D) 127.05 mph
4)If a 30-foot flagpole casts a 12 foot shadow,how tall is a mailbox casting an 18-inch shadow?
A) 1 in.
B) 15 in.
C) 164 in.
D) 45 in.
5) In Coordinate system points A (-2,3) and B (6,-1) have a midpoint of X. What is the midpoint between A and X
A) (4,2)
B) (0,0)
C) (-1,1.5)
D) (0,2)
Click here to see answer by ewatrrr(10682)

Question 465297: how to slove x+4y=10 and x+5y=10
Click here to see answer by ewatrrr(10682)

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