Questions on Algebra: Systems of equations that are not linear answered by real tutors!

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Question 775421: solve this equation using the substitution method
x+y=20
x-y=4
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Question 775816: How would I graph equations x+y=5 and 2y=x-2 together?
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Question 775967: What is the correct system of equation for cost and revenue?
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Question 775936: y=4x-2
y=5x
TRIED:
4x-2=5x
+4 +4
--------
-2=9x
- -
9 9 x=-0.22
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Question 774921: 4m-5n=8
2m+3n=10
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Question 776308: How to solve by Elimination
2y=5x-10
3x+18=6y
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Question 776655: x-y < 2 what would the cross of the y axis and the slope in which the line will follow?
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Question 778280: What is the solution to the fraction. 2/3-2/5+3/4+5/12
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Question 778967: A 55-foot board is to be cut into two pieces whose lengths are in the ratio of 4 to 7. Find the lengths of the two pieces.
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Question 780199: f(x)=2x^2+x
What is f(x+3)?
Is it 2x^2+x+21?
Thank you!
Click here to see answer by MathTherapy(10552) About Me 
Question 780962: please help me do this question. 4 more than 6 times a number x is -8
Click here to see answer by solver91311(24713) About Me 
Question 780963: 3/2a+4b=9. please help me with this equation
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Question 780966: 4 more than 6 times a number x is -8. how do you translate from a verbal phrase to solve it?
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Question 780958: 13 less than the product of 6 and a number y is -19
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Question 781559: the sum of 5 times a number and -2, added to 9 times a number
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Question 781717: please solve with steps
(3x+4)-(2x+5)
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Question 781772: Find the solution to the system of equations
3x+2y=22
9x-8y=-4
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Question 781254: -2(3x+2y+4x-5y)
Click here to see answer by tommyt3rd(5050) About Me 
Question 782139: Tara is 7th grader student at Swat Middle School in Bugsville, USA. She decides to start a rumor that the town of Bugsville is going to declare March 12 as National Bug Day and all schools will be closed for the day. On the first day Tara tells two students the rumor with the instructions that each of these students repeats the rumor to two more students the second day. Each of these new students is to repeat the rumor to two more students on the third day, and so on. For example, on the first day two students know the rumor; on the second day four more students will know the rumor; on the third day eight more students will know the rumor, and so on. How many new students will be told the rumor on day 12? If Tara starts her rumor on May 15th and there are 8000 students in the school district, will all of the town's students hear the rumor before May 30th?
Click here to see answer by stanbon(75887) About Me 
Question 782753: this question aint about math but i still need help with it.
what are long narrow fibers called that form cells of wood?
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Question 783081: help me to simplify completely 4y - y + 8y
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Question 783087: help me to do this word problem.
The sum of a number and 18 is - 23
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Question 783280: Determine if the point (0, 2) is a solution to the system: x + 3y = 6 -x + y = 8
A. No, it is not a solution
B. Yes, it is a solution
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Question 783281: Select the ordered pair from the choices below that is a solution to the following system of equations:
8x - 2 = y
5y - 12x = -3
A. (1, 6)
B. (1/4, 0)
C. (-2, -18)
D. (1/2, 2)
Please help !
Click here to see answer by Cromlix(4381) About Me 
Question 783554: 12-2(X-4)=38-5X
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Question 783604: (-2*10^-3) (3*10^2)
Evaluate the expression. Write the answer in standard form.
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Question 783607: Evaluate the expression. Write the answer in standard form.
(-2*10^3) (3*10^2)
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Question 783815: Which equation gives you a solution of (2,0) ?
A. 3x - y = 6; y + 2 = x
B. 3x + y = 6; y + 2 = x
C. 3x - y = 6; y + 2 = -x
D. 3x + y = 6; y + 2 = -x
Click here to see answer by xinxin(76) About Me 
Question 784011: 3. Which of the following systems of equations has no solution?
A. y = 2x - 5; y = -2x + 8
B. y = 12x + 3; y = -2x - 6
C. y = 3x + 8; y = 3x - 2
D. y = -5x - 4; y = 3x - 4
Click here to see answer by xinxin(76) About Me 
Question 784830: suppose you sell a total of 292 tickets for a football game. an adult ticket cost $3.00 and a student ticket cost $1.00. The sponsors collect $470 in ticket sales. Write and solve a system to find the # of each ticket. I got this so far:
3a + 1s =470
help
Click here to see answer by stanbon(75887) About Me 
Question 784830: suppose you sell a total of 292 tickets for a football game. an adult ticket cost $3.00 and a student ticket cost $1.00. The sponsors collect $470 in ticket sales. Write and solve a system to find the # of each ticket. I got this so far:
3a + 1s =470
help
Click here to see answer by xinxin(76) About Me 
Question 785517: have tried many times to solve this problem. a system of 3 equations
2x+y=17
y+z=6
x-z=7
I have several problems of this type I just need help getting started with the first problem
Click here to see answer by Alan3354(69443) About Me 
Question 785932: 10. Select the choice below that could be the first step in solving the following system of equations using substitution: y = 4x - 10 5 - x = y
A. Multiply the second equation by 4
B. Multiply the first equation by 2
C. Replace the left side of the first equation with the second equation
D. Write the first equation in terms of x
PLEASE HELP
Click here to see answer by xinxin(76) About Me 
Question 785929: Which equation has a solution of (2,0)
A. 3x - y = 6; y + 2 = x
B. 3x + y = 6; y + 2 = x
Click here to see answer by Edwin McCravy(20055) About Me 
Question 786454: Which equation has no solution?
A. y = `1/2`x - 2; y = `1/2`x + 1
B. y = 4x - 2; y = -2x + 1
C. y = x + 1; y = x - 2
D. y = 2x + 1; y = 2x - 2
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Question 788023: x+y=4
-x+y=4
determine if the lines collinear, parallel, and intersecting
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Question 788167: Find the solution to this equation: 3x + y = 6; y + 2 = x
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Question 788166: 8. Select the choice below that could be the first step in solving the following system of equations using elimination: -x + 4y = 9 3x - 5y = 10
A. Multiply the second equation by 4
B. Write the first equation in terms of x.
C. Replace the right side of the first equation with the second equation
D. Multiply the first equation by 3
Click here to see answer by mananth(16946) About Me 
Question 789676: Tennis court length is 3ft less than three times its width, area is 2106 ft squared
What is length
What is width
I started with quadratic equation
ax (squared) + bx + c = 0
A= lxw
L= 3w -3
L-3 x 3w= 2106ft squared
But got lost with the area squared
Thanks in advance for your help
Dianne
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Question 790244: 3(x+1)+2(x+2)
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Question 791865: 6-4x=18
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Question 794352: celeste wants to have her hair cut and permed and also go to lunch.The perm costs twice as much as the haircut and she needs $5 for lunch. How much does the perm cost?
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Question 794435: 4+3[2²-3(7-9)] I already know the answer is 34, but every time I try to solve it I get a different answer. Thankyou for taking the time to help me. Please show the step by step process so that I can figure out where I went wrong.
Click here to see answer by stanbon(75887) About Me 
Question 795658: These are solutions of three equations in three variables. i don't understand this at all. can someone please help?
Solve the system:
2x+y+4z=16
x+2y+2z=11
3x-3y-2z= -9
PLEASE HELP AND SHOW WORK!!!!
Click here to see answer by Alan3354(69443) About Me 
Question 795658: These are solutions of three equations in three variables. i don't understand this at all. can someone please help?
Solve the system:
2x+y+4z=16
x+2y+2z=11
3x-3y-2z= -9
PLEASE HELP AND SHOW WORK!!!!
Click here to see answer by josmiceli(19441) About Me