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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 104825: A new parking lot has spaces for 450 cars. The ratio of spaces for fullsizes cars to compact cars is 11 to 4. hhow many spaces are for full-sized cars? How many spaces are for compact cars?
k what you are suppose to do is write a linear equation and solve it. I am smart lol i just cant do word problems well! lol please help me!
Click here to see answer by edjones(8007)

Question 104783: Your teacher is giveing you a test worth 100 points conataining 40 questions. Therere are two-point and four-point questions on the test. how many of each are on the test?
K what we have to do is write two linear equations and solve them, I have no idea how to do it so i need help please!
Click here to see answer by elima(1433)

Question 104903: Using 7 coins to purchase an ice cream for $.85, what combination of quarters,nickles & dimes would you need equalling $.85 Use each coin at least once.
I know the answer is 2 quarters, 2 dimes & 3 nickles by breaking it down to
$.25 + $.10 + $.05= $.40, leaving 4 coins to equal $.45. What is the equation for a problems 3 unknowns? And how do I go about solving without just knowing?
Click here to see answer by Fombitz(32388)

Question 104818: The math club and science club had fundraisers to buy supplies for a hospice. the math club spent $135 buying six cases of juice and one case of bottled water. The science club spent $110 buying four cases of juice and two cases of bottled water. how much did a case of juice cost? how much did a case of bottled water cost?
K this one also needs to be written in a linear equation form and solved..i'm really bad at this stuff! please help me
Click here to see answer by ptaylor(2198)

Question 104979: At Gwen's garage sale, all books were one price, and all magazines were another price. Harriet bought four books and three magazines for $1.45, and June bought two books and five magazines for $1.25. What was the price of a book and what was the price of a magazine?
So first of all, I think all of the tutors are awesome!!! Thank you so much for offfering your services. My question on this is I need to write a system of 2 equations in 2 unknowns and then solve it. How would I set this up?
Click here to see answer by elima(1433)

Question 105124: I keep trying over and over again but cannot find the solution to this:
(3m-2)/5 = (4-m)/3

everytime I do it i keep getting m=6.5 .

Click here to see answer by ankor@dixie-net.com(22740)

Question 105119: if v = ir what does i =?
Click here to see answer by elima(1433)

Question 105117: if v=ir what does i=?
Click here to see answer by checkley75(3666)

Question 105334: when solving 5x-27=13, first____?____ to each side, then____?___ on both sides.
Click here to see answer by checkley75(3666)

Question 105345: sovle 5x-27=13 and check your result.
Click here to see answer by checkley75(3666)

Question 105783: How do I rewrite the equation -8x-5y=-45 as a function of x?
Click here to see answer by bucky(2189)

Question 105783: How do I rewrite the equation -8x-5y=-45 as a function of x?
Click here to see answer by Fombitz(32388)

Question 105220: 2x-4/4 is less than or equal to 1+x/3
Click here to see answer by Fombitz(32388)

Question 105806: 2x + 3y = 9
4x + 6y = 12
solve for x and y
2x = 9-3y
x = (9/2)-(3y/2)
4((9/2)-(3y/2)) + 6y = 12
18-6y+6y=12
18=12 ????
what am I doing wrong?
thanks

Click here to see answer by Fombitz(32388)

Question 105803: 3x-5y=7
-9x+15y=-21
solve for x and y
Click here to see answer by checkley75(3666)

Question 105907: what is 846+n=-536
Click here to see answer by HyperBrain(694)

Question 105869: In solving -3y+14=98, Paula instructed her CAS to divide both sides by -3.

a. What result did she get?
Click here to see answer by edjones(8007)

Question 105962: Graph the linear equation 4x-5y=40
Click here to see answer by alvinjohnburgos(11)

Question 105981: Factor each trinomial
7x^2+x-8
4m^2-17m+18
14m^2+17m-22

Click here to see answer by kmcruz09(38)

Question 106200: Solve for x. Specify restrictions, if any, on the value of x: 3x+8/x=-14.
I don't even understand about restrictions???? Please help me solve and find restrictions.
Click here to see answer by Fombitz(32388)

Question 106351: How to slove {y=-x+3}{y=3/2x-2}

Click here to see answer by solver91311(24713)

Question 106447: Please help me with solving this equation. I came up with the answer 5/6 but I am not sure that this is right. 6x + 4(3x � 2) = 6x + 2. Thank-you
Click here to see answer by stanbon(75887)

Question 106514: A system of linear equations has solutions (1, -1) and (-2,3).
a)Can you find another solution?
b)How many solutions must exist?
Click here to see answer by stanbon(75887)

Question 106545: Find the equation of the line through the points (4,-1) and (2,-7). Write the equation in standard form with only integers.
Is standard form ax+by=c? If so, how do I go about puting this in standard form?
Click here to see answer by jim_thompson5910(35256)

Question 106610: How would you solve this by using the elimination method?
2x+12y=7
3x+4y=1
Click here to see answer by jim_thompson5910(35256)

Question 106702: How would you solve this equation, by either using the substitution method or the elimination method?
3x/4-y/3=7/6
x/2+2y/3=5/3
Click here to see answer by jim_thompson5910(35256)

Question 106623: solve please and show steps 3x-6y=9

Click here to see answer by elima(1433)

Question 106701: find the value of x
2x + 6
Click here to see answer by MathLover1(20850)

Question 103651: this multiple choice is hard someone please help
x^2+8=57
a. +-quare root 65
b. +-square root 57-8
c. +- 7
d. +- square root 57+8
Click here to see answer by TP(29)

Question 106834: solve each systems by substitution:
4x-12y=5
-x+ 3y=-1
Click here to see answer by HyperBrain(694)

Question 106833: solve edach systems by substitution:
8x-4y=16
y=2x-4
Click here to see answer by HyperBrain(694)

Question 106832: solve each systems by substitution:
5x-2y= -5x
y-5x= 3
Click here to see answer by HyperBrain(694)

Question 106811: x+y+z=30000
.02x+.03y+.06z=1110
.02x+150=.03y : solve for x,y, and z.
The problem im having with this problem is the "z" variable. It is only on 2 of the 3 equations. Ive been trying to solve by using the method of elimination, but I cant seem to isolate the variables. thank you.

Click here to see answer by HyperBrain(694)

Question 106976: solve each system by elimination. check your answers.

-x-y-2z=4
-x+2y+z=1
-x+y-3z=11
Click here to see answer by checkley75(3666)

Question 106918: x+5y=10
-2x-10y= -20
Click here to see answer by elima(1433)

Question 106977: solve each system by elimination. check your answers.

-x-y-2z=4
-x+2y+z=1
-x+y-3z=11
Click here to see answer by scott8148(6628)

Question 107070: find the values for m and b in the following system so that the solution to the system is (-3,4)
mx+3y=8
-3x+4y=b
Click here to see answer by HyperBrain(694)

Question 106987: My question involves a word problem:
A certain car that is being tested by its manufacturer uses it entire fuel supply in about 38 hours when idling. The same car, when driven at 60 miles per hour on a test track, uses about three-and-a- half times as much fuel per hour as it does when idling. If the engine has been idling for 10 hours and the car is then run at 60 miles per hour, how much longer will the car run before it uses up all of its fuel?
I think it is 38 - 10 = 28 divided by 3.5 = 8 hours.
I just don't know the exact steps to follow to get the correct answer.
Could you please help....
Thank you...
Click here to see answer by josmiceli(19441)

Question 107089: Someone please help me solve this problem, I am going to have similar ones on a test. Find three consecutive even intergers such that three times the second minus the third is 12 more than the first.
Click here to see answer by Annabelle1(69)

Question 107088: I can't remember how to do this type of problem, someone please help me I will be so thankful. Find three consecutive intergers whose sum is 93.
Brina
Click here to see answer by Annabelle1(69)

Question 106911: solve each of the systme by using either addition or substitution. If a unique solution does not exist, state whethere the system is dependent or inconsistent:
10x+2y=7
y=-5x+3
Click here to see answer by elima(1433)

Question 106915: solve the following system by addition. if a unique solution does not exist, state whethere the system is consistent or dependent.
2x+3y=1
5x+3y=16
Click here to see answer by elima(1433)

Question 107136: Can someone please help me with this type of problem?(-3/7xyz)(x^2y^3)(7xyz^2).
Ty
Click here to see answer by edjones(8007)

Question 107138: Will someone please help me, the problem states to find the quotient:
-45x^3y^5/3xy^2
thank you
Click here to see answer by edjones(8007)

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