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

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Question 439384: Please show me step by step how to figure this 3 variable system question out:
Then maybe I can understand it and do the rest of the questions. THANKS!
2m-4=6
m+2p=4
3p-n=5
Click here to see answer by Alan3354(30993)

Question 439406: f(6) = 3,f(9) = 15
Click here to see answer by stanbon(57342)

Question 439467: Could someone please show me how to solve this? A cellular phone company offers a contract for which the C, in dollars, of the t minutes of telephoning is given by C=0.25(+-300)+42.95. Where it is assumed that t is less than or equal to 300 minutes. What time will keep the costs between $84.95 and $114.45 the telephoning time must be between _ and _ minutes
Click here to see answer by stanbon(57342)

Question 439471: Could someone please show me how to solve this? A cellular phone company offers a contract for which the C, in dollars, of the t minutes of telephoning is given by C=0.25(t-300)+42.95. Where it is assumed that t is less than or equal to 300 minutes. What time will keep the costs between $84.95 and $114.45 the telephoning time must be between _ and _ minutes
Click here to see answer by stanbon(57342)

Question 439430: Solve the inequality and represent your answer in set builder notation.
7z + 3 < 6z – 5
Click here to see answer by nerdybill(6958)

Question 439524: hi my math problem says.
the drama club sells 200 lb of fruit to raise money. the fruit is sold in 5-lb bags and 10-ib bags.
a. write an equation to find the number of each type of bag that the club should sell.
b. graph your equation
c. use your graph to find two different combinations of types of bags.
Thank you sooo much and please show your work!!!
Click here to see answer by stanbon(57342)

Question 439528: My math problem says
Jessica goes to a store to buy $70 worth of flour and sugar for her bakery. A bag of flour costs $5, and a bag of sugar costs $7.
a. Write an equation to find the number of bags of each type Jessica can buy.
b. Graph your equation.
Thank you so much. Can you please show your work thank you!
Click here to see answer by rwm(914)

Question 439525: My math problem says
The student council is sponsoring a carnival to raise money. Tickets cost $5 for adults and $3 for students.The student council wants to raise $450.
a. write an equation to find the number of each type of ticket they should sell.
b. graph your equation
c. use your graph to find two different combinations of tickets sold.
thank you so much and please show your work.
Click here to see answer by rwm(914)

Question 439507: in a parallelogram one angle is 4/5th of the adjacent angle. Determine the angles of the parallelogram
Click here to see answer by rwm(914)

Question 439696: How do you set up the following equation:
6z-5=z+5. I've tried
6z-5=z+5
5 5
6 -6
_______________
-5
However that is not correct. Then I tried:
6z-5=z+5
6z-5+5-z
6z-10-z
5
__________
2
but I can't figure out what to do with the 6z and z.
Thank you.
Click here to see answer by solver91311(16885)

Question 439843: if you algebraically solve a system of two equations and get 6=10, how many solutions do they have?
Click here to see answer by Gogonati(809)

Question 440021: What is the value of x in the solution to the system if equations.
x + 2y + 4z = 12
y + 2z = 8
5y = 10
Click here to see answer by josmiceli(9676)

Question 440105: Malome is presently half his brother's age. Five years ago his age and his brother's age added up to 26. What is Malome's present age.?
Click here to see answer by stanbon(57342)

Question 440317: i need help solving a chapter problem.
its a word problem that many students have trouble with.
So far i have gotten most of it until it said to find a number to make to solution exist.
this is what i have.
x+y=45
11x+10y= ?
i have tried 100, 80, & 81 but none of them worked , it was all no solution.
i know how to graph the problems & solve them alebraically . Its just finding a number to make it a solution is what i am having trouble with .
please help D:
if you need more info about the problem please email me.

Click here to see answer by rwm(914)

Question 440320: i sent the wrong email by accident
my problem was
x+y=45
11x+10y= ?
i've already tried 100, 80, & 81. all of them were no solution.
i already know how to graph it & solving it algebraically .
i just need help finding a number to make it a solution.
Click here to see answer by MathLover1(6632)

Question 440918: Please help me solve this question
Which of the following will be part of the solution to the system
x >= y+1
y >= -x+2
A.(4,2)
B.(2,4)
C.(0,2)
D.(-3,1)
The answer I came up with was A but was told it was C
Click here to see answer by scott8148(6628)

Question 440885: Solve by elimination
5x + 5y = -7
7x - 2y = 19
If all work could be shown (even the simplest) it would be very appreciated.
I am having trouble figuring out how to simplify 80/10 down to 16/5.
Thank you!
Click here to see answer by jorel1380(2518)

Question 441063: 4x −4 > −2x +8
Click here to see answer by stanbon(57342)

Question 441459: I need to understand the formula to get the right answer.
example,
if 8y + 11 = 2y + 29, what does y =?
Click here to see answer by nerdybill(6958)

Question 441548: Again, I know there is not a section, but can anyone help with the following problem please?
Find the equation of the tangent line to the curve when x has the given value.
f(x) = x2 + 5x ; x = 4
Click here to see answer by josmiceli(9676)

Question 442111: .lmmjmjghhvhhjhjhhhjhjhj

Click here to see answer by rwm(914)

Question 442236: how many ordered pair solutions exist for the equation y=x+273
Click here to see answer by stanbon(57342)

Question 442408: x+y=3
2x-3y=16
Click here to see answer by swincher4391(726)

Question 442407: -5x+3y=6
x-y=4
Click here to see answer by ewatrrr(10682)

Question 442406: y=3x+2
y=4x-1
Click here to see answer by ewatrrr(10682)

Question 442405: x-y=2
5x+3y=18
Click here to see answer by rwm(914)

Question 442562: Y=3x+2
y=4x-1
Click here to see answer by rwm(914)

Question 442725: solve the system by the substitution method.
15x-y=51
y=x^2+5
Click here to see answer by stanbon(57342)

Question 442865: I hate to ask, but is there anyone that can proofread my algebra work? I'm not looking for the answers, but for someone to point out which ones I need to look at again. I'm pretty sure of my work but I'm nervous to turn it in because it counts for so much of my grade. Thank you!
Click here to see answer by scott8148(6628)

Question 442756: A labourer is engaged for 20 days on the condition that he will receive for Rs. 60 for each day he
works and will be fined Rs. 5 for each day he is absent. If he receives Rs. 745 in all, for how many
days did he remain absent
Click here to see answer by ankor@dixie-net.com(15651)

Question 442979: solve by the substitution method,whats the solution of system 4x + 5y =13 and -6x +y =57
Click here to see answer by swincher4391(726)

Question 442979: solve by the substitution method,whats the solution of system 4x + 5y =13 and -6x +y =57
Click here to see answer by MathLover1(6632)

Question 443467: How do you solve this equation and put it into slope intercept form: 2=y

Click here to see answer by rwm(914)

Question 443509:

Solve by the elimination method. what is the solution?
Click here to see answer by MathLover1(6632)

Question 443833: What is the equation for the depth of 10 feet but water level dropping at a rate of 1/2 inch a week?
Click here to see answer by Alan3354(30993)

Question 444087: One type of candy sells for $2 per
pound, and another type sells for $3 per pound. An
order for 18 pounds of candy costs $47. How much of
each type of candy was bought?
Click here to see answer by edjones(7569)

Question 444048: -5xy+2z=2w for y
Click here to see answer by edjones(7569)

Question 444219: I am having trouble simplifying this {12+[6(9x+2y)]}-[8(4x+19y)]
Click here to see answer by stanbon(57342)

Question 444218: I am having trouble simplifying this. {12+[6(9x+2y)]}-[8(4x+19y)]

Click here to see answer by stanbon(57342)

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