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

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Question 388872: A girl has a number of ducks costing $10 each and three times as many chickens costing $6 each. If the total cost of ducks and chickens is $420, find the number of chickens the girl has.
Click here to see answer by haileytucki(390)

Question 388876: Ushna has enough money to buy 24 apples. If the price of each apple is reduced by 5 cents, she will be able to buy an extra 6 apples with the same sum of money. Find the original cost of the apple.
*Prove your answer is 25 cents*
Click here to see answer by mananth(16946)

Question 388893: Ahmad and Ushna start off simultaneously from two towns to meet one another. If Ahmad travels 2 km/h faster than Ushna; they would meet in 3 hours. If Ushna travels 1 km/h slower and Ahmad's speed is two-thirds of his previous speed, they would meet in 4 hours. How far apart are the two towns?
Click here to see answer by mananth(16946)

Question 388892: A tank can be fully filled with water using a pipe that fills 20 litres in a minute. A bigger pipe that can fill 25 litres in a minute will take one minute less to fill the same tank. How many minutes does the smaller pipe take to fill the tank?
Click here to see answer by mananth(16946)

Question 386720: 4x+2y=2
-3x-y=-3
Click here to see answer by gwendolyn(128)

Question 388866: perform the indicated operations:

[1 1 -3] [-2 -1 8]
3 [3 2 3]+4[4 2 2]
[7 -1 6] [3 6 3]

solve the minimization problem:
minimize C= -2+y
subject to 3x+4y < 6
-
3x+2y < 12
-
x>0, y > 0
- -
Click here to see answer by haileytucki(390)

Question 389006: 2x+8/9x+2 restriction of x
Click here to see answer by Jk22(389)

Question 389011: With a fixed amount of money $M, Mrs. Ushna Tehseen can use it to pay the wages of a local worker for 40 days or to pay the wages of an unskilled foreign worker for 60 days. If she employs one local worker and one unskilled worker foreign worker for a top secret project, how many days will the $M be enough to pay for these two workers?
Click here to see answer by mananth(16946)

Question 389089: I need to find the slope and y-intercept
f(x) = -6x-5
Thank you
Click here to see answer by Alan3354(69443)

Question 389089: I need to find the slope and y-intercept
f(x) = -6x-5
Thank you
Click here to see answer by Fombitz(32388)

Question 389093: Find an equation of the line containing the given pair of points.
(4,1) and (12,3) y=
Thank you
Click here to see answer by haileytucki(390)

Question 389091: I need to find the equation of the line having the given slope and containing the given point. Express your answer in the form of y=b or y=mx+b.
m=0 (0,-1)
Thank you
Click here to see answer by Fombitz(32388)

Question 389095: Find the slope and the y-intercept of the line
10x=3y+6
Thank you
Click here to see answer by haileytucki(390)

Question 389092: I need to graph the equation using the slope and the y-intercept
y= -10/7x-4
Thank you
Click here to see answer by Alan3354(69443)

Question 389167: how do you slove for x :
x-3=4+x
Click here to see answer by jim_thompson5910(35256)

Question 389168: I have a word problem...I'm not sure what type of problem it is but...it's a word problem but I believe it is also a linear equation. Here is the question...
Mr.Collins and his son own a cattle farm. They have been losing cattle in the swamp, the forest and the river that border their land. They want to build a fence to enclose their farm. They know that the fence will form a semicirlce, two sides of a rectangle and the hypotenuse of a triangle. How many feet of fencing will they have to buy? If the fencing costs $2.16/ foot, how much will the fence cost? Use pi=3.14. I have the width of the rectangle as 400 ft the length of the rectangle as 600 ft and the heigth of the triangle as 300 ft. The triangle is on top of the rectangle and the semi circle lays against the height of the rectangle and the height of the triangle with a total length of the diameter of the circle would be 900 feet. I know that the radius of circle would then be 450 ft...help! I don't even know where to start with the information.

Click here to see answer by jerryguo41(197)

Question 389219: Solve if possible 3x+y+2= 0 2 x-y+2=0 2x+y+2=0
Click here to see answer by ewatrrr(24785)

Question 389226: Determine whether the graphs of each pair of lines are parallel.
3x+8=y
2y=6x-3
Are the graphs of the given equation parallel?
Thank you!
Click here to see answer by ewatrrr(24785)

Question 389228: Find the slope and the y-intercept of the line.
10x=3y+6
My answer was the slope was 3 and the y- intercept was (0,-6) but I am not sure if that is correct? Thank you!
Click here to see answer by ewatrrr(24785)

Question 389227: Given the function h(v)= 7v+3 find the following.
h (3) h (-4) h (6.2)
Click here to see answer by Alan3354(69443)

Question 389225: I need to find the indicated outputs for
f(x)= 3x^2-2x
f (0) f (-1) f (2)
Thank you
Click here to see answer by Alan3354(69443)

Question 389513: Find the intercepts and then use them to graph the equation. (I always have a hard time figuring out how to find the intercepts.)
y= -2-2x
Thank you
Click here to see answer by nerdybill(7384)

Question 389510: I need to determine whether the graphs of the equation are perpendicular. I believe that they are but I want to make sure. Thank you
8x-5y=7
8y-5x=5
Click here to see answer by robertb(5830)

Question 389518: how to solve (-10,-5) and (-8,-2) with the equation y-y1=m(x-x1)
Click here to see answer by haileytucki(390)

Question 389518: how to solve (-10,-5) and (-8,-2) with the equation y-y1=m(x-x1)
Click here to see answer by MathTherapy(10552)

Question 389511: I need to write an equation of the line containing the given points and parallel to the given line. Express answer in y=mx+b forn
(-9,6); 2x=3y+8 The equation of the line is y=

Thank you
Click here to see answer by mananth(16946)

Question 389507: I need to find the slope if it exists of the line containing the pair of points
(-14.3,15.7) and (-11.8,2.5)
Thank you
Click here to see answer by haileytucki(390)

Question 389542: how do you convert y=-4x+5 into general linear form
Click here to see answer by ankor@dixie-net.com(22740)

Question 389628: Determine the distance between x-intercept and z-intercept of the plane whose equation is 2x+9y-3z=18?
Click here to see answer by lawat(1)

Question 389637: what is the answer to this 5n+34=-2(1-7n)
Click here to see answer by checkley79(3341)

Question 389509: I need to find the domain of the function and I have no idea how to do so.
g(x)= 9/(2-3x)
A. x/x is a real number and x#9
B. x/x is a real number and x#2/3
C. x/x is a real number and x#0
D. x/x is a real numner and x is greater than or equal to 2/3
Thank you
Click here to see answer by robertb(5830)

Question 389869: What is the x- coordinate of the solution to the system of linear equations 3X+6Y=4 AND X-3Y=1,
?
Click here to see answer by ewatrrr(24785)

Question 389956: I need to find the slope-intercept equation of the line that has the given characteristics.
slope 4.3 and y- intercept (0,-4)
the slope-intercept equation is y=
Thank you
Click here to see answer by stanbon(75887)

Question 389959: Graph the equation by plotting points.
y=0
This looks simple but I really am not sure, I believe I just plot the 0 going horizontally but I am not sure.
Thank you
Click here to see answer by stanbon(75887)

Question 390155: 3x+y=2
4x+y=20
Click here to see answer by Fombitz(32388)

Question 390143: x-5y=-6
10y=2x+1
Click here to see answer by mananth(16946)

Question 390244: write and equation for the line going through the points (2,3) and (4,-2)
Click here to see answer by ewatrrr(24785)

Question 390482: x+2y-z=-7
2x-2y-z=6
x+y-2z=-6
Click here to see answer by stanbon(75887)

Question 390483: x+1/3y=-11
3/4x-1/2y=-15
Click here to see answer by emargo19(101)

Question 390591: Solving systems by graphing and substitution
y = 2x - 1
x + y = 2
Please show me if this problem is independent, dependent or inconsistent. More importantly I'd like to know the best way to solve future problems like this
Click here to see answer by Alan3354(69443)

Question 390612: Solve by substitution
x = y + 5
2x - 2y = 12
Please show me if this problem is independent, dependent or inconsistent. More importantly I'd like to know the best way to solve future problems like this''.
Click here to see answer by ewatrrr(24785)

Question 390608: Solving systems by graphing and substitution
3x - y = 4
3x - y = 0
Please show me if this problem is independent, dependent or inconsistent. More importantly I'd like to know the best way to solve future problems like this''.
Click here to see answer by josmiceli(19441)

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