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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 336264: I am looking for the process of converting m/s to mi/h, as in the speed of sound.
Click here to see answer by ankor@dixie-net.com(15649)

Question 336334: After robbing a bank in Dodge City, a robber gallops off at 12 mi/h. 10 minutes later, the marshall leaves to pursue the robber at 15 mi/h. How long (in hours) does it take the marshall to catch up to the robber?

Click here to see answer by checkley77(12569)

Question 336390: Please help me graph each inequality in two variables. Thank you.

y< 2x + 2

2x < 3y + 6
Click here to see answer by stanbon(57307)

Question 336507: True or False?
If the intersection of two closed intervals is nonempty, then their intersection is a closed interval.
Click here to see answer by user_dude2008(1861)

Question 336671: Solve each system of linear equation by an method.
3x + 4y = 1
2x + 3y = 1
Please help !
Click here to see answer by jim_thompson5910(28593)

Question 335899: 1/2x -2 = 1/3(x-2)
Click here to see answer by Fombitz(13828)

Question 336771: 5x-y+z=4=x+2y-z=5=2x+3y-3z=5
Click here to see answer by checkley77(12569)

Question 336770: Solve each system by substitution.
x-y+2z=7=2x+y+z=8=x-z=5
Click here to see answer by checkley77(12569)

Question 336929: whats 41-2n=2+n
Click here to see answer by rfer(12657)

Question 336920: (4w-28)+(11w+13)=180 and may you please show the work
Click here to see answer by rfer(12657)

Question 337178: I've been trying to simplify the following expression and keep missing a step while doing so. Can you please assist me? Thank you!

1/2(3x + 2)- 1/4(3x - 2)=
[{{(1/2)*3x} + {(1/2)*(2/1)}} + {-1{{(1/4)*3x}-{(1/4)*2}}}]=
[{(3x/2)+(2/2)} + {-1{(3x/4)-(2/4)}}]=
[{(3x/2+1)} + {-1*(3x/4)}-{(-1)*(1/2)}}]=
[(3x/2+1)} + {{(-1)*(3x/4)}-{(-1)*(1/2)}]=
[{3x/2 + 1} + {-3x/4 + 1/2}]=
[{3x/2 + 1} + {-3x/4 +1/2}]=
[3x/2 +1 -3x/4 +1/2]=
3x/2 -3x/4 + 1+ (1/2)=
2/2*3x/2 - 3x/4 +1 1/2 =
(6x/4-3x/4) + 1.5 =
3x/4 +1.5
or 3/4x + 1.5

Click here to see answer by stanbon(57307)

Question 337180: Please help me with trying to solve this equation. I'm missing a solution step in solving for x. Thank you!

x + 0.06x = 742
Click here to see answer by Fombitz(13828)

Question 337180: Please help me with trying to solve this equation. I'm missing a solution step in solving for x. Thank you!

x + 0.06x = 742
Click here to see answer by stanbon(57307)

Question 337183: if the linear equation is 2b=18 do i just need to solve for b?
Click here to see answer by Fombitz(13828)

Question 337457: Your astute algebra knowledge and assistance is needed to help me solve this problem. Please help. Thank you.

2a(4a-5)- 3a(-2a-5)
8A^2 – 10A +6A^2+15A
14A^2+5A

2a(4a-5)- 3a(-2a-5)
Click here to see answer by chiexpert(48)

Question 337561: After robbing a bank in Dodge City, a robber gallops off at 13 mi/h. 30 minutes later, the marshall leaves to pursue the robber at 15 mi/h. How long (in hours) does it take the marshall to catch up to the robber?
Click here to see answer by Fombitz(13828)

Question 337519: How do you solve this question. 1/8-3/4x=1/16
Click here to see answer by benazir.sj@gmail.com(109)

Question 337566: Simplify the algebraic expression
2(4y-2)-(3y+4)
2(4y-2)-(3y+4)
8Y-4-3Y-4
5Y-8

Click here to see answer by chiexpert(48)

Question 337624: Solve by elimination 8x + 7y = -16 6x - 3y = -12
Click here to see answer by Fombitz(13828)

Question 337813: 1. points A, B, and C are collinear and A is between B and C.
AB= 4x -3 BC =7x + 5, and AC = 5x -16
Find each value.
a. BC
b. AB
c. AC
Please e3xplain how to solve this problem
Click here to see answer by solver91311(16877)

Question 337889: (2g-15)+g=9
+15 +15
2g + g = 24
3g = 24
g = 8
Click here to see answer by alexcar310(1)

Question 337992: 2K+AR = R-3Y Must solve for R
Click here to see answer by nyc_function(2733)

Question 337931: t-2(3-2t)=2t+9
3t-6-2t^2+4t=2t+9
7t-6-2t^2=2t+9
5t-6-2t^2=9
5t-2t^2=15
-2t^2+5t-15=0
I believe I have it right to this point, but I can not remember how to simplify when it is squared.
Click here to see answer by edjones(7569)

Question 338337: what do all memebers of the family of linear functions f(x)=1+m(x+3)? sketch several memebers of the family.
Click here to see answer by solver91311(16877)

Question 338448: "Two dump trucks have capacities of 10 tons and 12 tons. They make a total of 20 round trips to haul 226 tons of topsoil for a landscaping project. How many round trips does each truck make?"
I just need help with setting up the system, I can do the rest.
Thanks!
Click here to see answer by jim_thompson5910(28593)

Question 338878: I have been out of schol for too long. I have the word problem: The greater of two numbers is five less than twice the lesser number. The sum of two numbers is 28.
this is as far as I got
x+y=28

2x-5=y

Click here to see answer by jim_thompson5910(28593)

Question 339187: Forty decreased by the number m is 24.5?
The sumof one third of the number s and 12 is 32?
Four less than twice a number is nine?
Three times two dcreased by x is eight?
Three diminished by twice a number is eight?

Click here to see answer by rfer(12657)

Question 339141: How many possible solution are there for:-
2x+3y+12z=180 ,where x,y, z are all positive integers????
Click here to see answer by Edwin McCravy(8908)

Question 339281: 1/8(5Y+64)=1/4(20+2Y) Solve the equation...If possible
Click here to see answer by rfer(12657)

Question 339333: The function W(d)=0.112d approximatesthe amounts, in centimeters, of waterthat results from d centimeters of snow melting. Find the amount of water that results in snow melting from depths of 12 cm, 49cm, and 87cm
Click here to see answer by nyc_function(2733)

Question 339424: Solve the following equation...If possible...
5/8m-3/8=1/2m+7/8
Click here to see answer by rfer(12657)

Question 339533: i worked this problem: (2x + 1)/3 - (3-x)/4 = (x)/6
and i got 1.67 = x which is wrong
this is how i did it:
(2x+1)/3 - (3-x)/4 = (x)/6
multiply by the LCD,12. to get rid of the fractions
24x+12/3 - 36-12x/4 = 12x/6
8x + 4 - 9 - 3x = 2x
simplify
5x - 5 = 2x
subtract 2x to get the variables on the same side
5x - 5 - 5x = 2x - 5x
-5 = -3x
multiply by 1/-3
-5(1/-3) = -3x(1/-3)
-5/-3 = -3x/-3
simplify
1.67 = x
can you tell me what am i doing wrong??? thanks!

Click here to see answer by jrfrunner(365)

Question 339851: Find three consecutive integers whose sum is -33.
Click here to see answer by Alan3354(30993)

Question 339851: Find three consecutive integers whose sum is -33.
Click here to see answer by nerdybill(6958)

Question 339513: solve A= 2(pi)rh + 2(pi)r^2 for (pi)
i worked this problem and my answer was (A)/2rh + 2r^2 = (pi)
i was not sure how to do the problem so i'm a liitle uncertain about my answer, but have no way of checking it.... is it right?
Click here to see answer by Fombitz(13828)

Question 340508: X+5(x-1)=19
2x=10(x-4)
6x-11=-2x+5
18x-15=-21+12x
1/2(10x-6)=x-15
7(1-x)=-4x-11
3(2x+12)=-2(x-4)+x
8(x-1)=3x+7
2x+4(2x-1)=6(x+4)
i need help with these problem cant figure them out can someone please help me i really need thx to who ever can help me.
Click here to see answer by rfer(12657)

Question 340669: 2d + 1/5 = 3/5 How would you work these kinds of problems?
Click here to see answer by rfer(12657)

Question 340767: z/2 + 1 = 3/2
Click here to see answer by rfer(12657)

Question 341038: What is r? I am having a hard time putting it in the simplest term
7r/12=-14
the 7r and 12 is a fraction. 7r is the numerator and 12 is the denominator. I am sorry but I didn't know how to type the fraction in this message.
Click here to see answer by rfer(12657)

Question 341041: Solve the system of equations by graphing. Then classify the system.
5u+v=2
y=-x-13
9x-8y=-32
Click here to see answer by Fombitz(13828)

Question 341059: I am very confused with this question.I really can't see what the letters would represent.

Click here to see answer by stanbon(57307)

Question 341061: I am not sure if I am supposed to subtract on the right side. I am having a hard time seeing it.
9-2m/7=19
2m/7 is a fraction.
Click here to see answer by Alan3354(30993)

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