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Tutors Answer Your Questions about Linear-systems (FREE)
Question 54435: Please help. I don't understand this.
Solve the following system by substitution. If a unique solution does not exist, state whether the system is inconsistent or dependent. 4x – 12y = 5 and -x + 3y = -1
Click here to see answer by funmath(2873)   |
Question 54432: I do not understand how to solve this, please help.
Solve the following system by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
x + 5y = 10 and -2x – 10y = -20
Click here to see answer by funmath(2873) |
Question 54593: can you please help i forgot how to do this
Solve each equation by the subtraction method. Determine whether the equation are independent, dependant, or inconsistent.
28. x =y + 4
3y – 2y = 4
thank you in advance
Click here to see answer by funmath(2873) |
Question 54707: A crate of grapefruit has a total mass of 4 kg. When 12 grapfruit are removed, the total mass is 3kg. Determine the mass of the crate and of the grapefruit.
I have an answer but i'm just making sure. Thx
Click here to see answer by Nate(3495) |
Question 55055: Hi, the question i have is that a computer is purchased at end of 1999 for $3000. Scrap value of the computer in 2001 is expected to be $500. Find a linear function that describes the value of the computer, if t is the age of the computer in years.
I wouldn't know where to start!! thanks.
Click here to see answer by Hook(36) |
Question 51328: Solve each of the following systems by addition. If a unique solution does not exist, state whether the system is inconsistant or dependent.
2x + 3y = 1
5x + 3y = 1=
and this one too please!
x + 5y = 10
-2x - 10y = -20
Thank you so much for your help.
littletornado52
Click here to see answer by rchill(405) |
Question 49042: I have a graph plotted (7,5) and (8,3) , horizontal axis is D and vertical axis is P. i need to get the equation of the line joining these points, i.e) P= 1d - 2 but it isnt that and i cant work it out, any help would be appreciated.
Click here to see answer by rchill(405) |
Question 55056: Hi, the question I have is
a manufacturer of tv dinners has monthly revenue of R= -q^2+25q
R is revenue in hundreds of dollars when q dinners are produced.
Cost function is C=4q+40 where C is also in hundreds of dollars.
Manufacturer is limited to producing 2500 dinners per month.
Solve the equations and use a graph to show how manufacturer can operate a profit.
To solve the equations would I have 2500= (-q^2+25q) - (4q+40) since profit is cost-revenue.
So then I have 2500= -q^2 + 25q -4q -40
2500 = -q^2 + 21q -40
2500+40 = -q^2 +21q
2540 = -q^2 +21q
equation to make profit would be -q^2 + 21q - 2540
Then do i find points from this equation to graph it??
I really have no idea and am working with a guess.
Tahnks for any help you could possibly give me!!
Click here to see answer by stanbon(26297) |
Question 55054: Hi, I have the following question and I don't know what to do.
It is the demand for goods is p^2 + q^2 = 169 where p is price and q is quantity. The supply equation is p = q + 7.
What are the equilibrium price and quantity?
I'm unsure but i'm assuming that equilibrium is where supply equals demand
but the demand equation has roots, so would it be p+q= square root of 169
then that equals p-q-7.
But i still from that cannot get a price for p and a price for q.
I'm extremely stuck and any help would be greatly appreciated.
Click here to see answer by Hook(36) |
Question 55257: write the slope-y-intercept equation form of the line which has slope 2/3 and passes through the point: (-3,3)
write the point-slope equation form of the line which passes through 2 points: (-9,0), (-5,3)
write the general equation form of the line which passes through the 2 points:(1,2), (6,7)
Click here to see answer by venugopalramana(3286)  |
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