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

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Question 1058261: Please help me solve this 3 variable system:
x+y+z=8
x-y/3+(4/3)z=7
3z-3y-2x=7

Click here to see answer by MathTherapy(10549) About Me 
Question 1057618: The accompanying table shows the percent of the adult population that married before age 25 in several different years. Write a linear equation in y=mx+b form to represent this situation. If you could use the first and third data, it would be really helpful.
1971 42.4
1976 37.4
1980 37.1
1984 34.1
1989 32.1
1993 28.8
1997 25.7
2000 25.5


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Question 1058733: The sum of the digits of a 2-digit number is 15. The digits
are reversed when 27 is subtracted from given number.
What is the the two-digit number?
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Question 1058733: The sum of the digits of a 2-digit number is 15. The digits
are reversed when 27 is subtracted from given number.
What is the the two-digit number?
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Question 1058733: The sum of the digits of a 2-digit number is 15. The digits
are reversed when 27 is subtracted from given number.
What is the the two-digit number?
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Question 1058796: The sum of two integers is 32. Four less than twice the smaller number is equal to the larger number x. Find the larger number.
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Question 1058904: Solve the following system of nonlinear equations. Choose all answers that apply. x^2+y^2=3 x^2+y=0
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Question 1059005: Minda invested her 5,000 earnings from working abroad in two banks, part at 8% annual interest and the rest at 9%. If the total annual interset for both dollar deposits is $435, how much was invested at each rate?
Click here to see answer by stanbon(75887) About Me 
Question 1058899: Simplify. write the answer using positive exponents only. (9x^2+2x+3)-(4x^2+3x7)Please show me how to do this step by step. Thank you.
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Question 1059309: solve the system of equations
x+y-z=2
-x+2y-3z=-7
x+5y-3z=21
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Question 1059379: The perimeter of a rectangle is 46 M. The width of the rectangle is two more than half the length. Find a length and width. show your solution
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Question 1059518: Hello,
I need to know what the meaning of life is urgently. Please help
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Question 1059377: The sum of the length and width of a rectangle is 20 inches. the length is one less than twice the width. find the length and width of the rectangle. show your solution
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Question 1059651: 6x-9=y
Y=-3x
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Question 1059742: which line is perpendicular to the line passing through the points (-4,2) and (4,-2) A:4x+3y=15 or B:4x-3y=9
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Question 1060175: Two lines have the equations 2x – y = 1 At what point do they intersect?
3x = y – 6
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Question 1060310: melissa has a pickle jar that contains 65 coins worth $8.65. The pickle jar only has nickles and quarters.let q represent quarters, and let n represent nickles.what is the system that models this equation
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Question 1060660: Can you please help me. I'm want to solve this system of equation using the substitution method.
-3x+3y=4
-x+y=3
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Question 1060660: Can you please help me. I'm want to solve this system of equation using the substitution method.
-3x+3y=4
-x+y=3
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Question 1060716: A coffee shop expects to make at least $300 each day from the sale of two types of coffee, the standard latte, which costs $2, and the tea latte, which costs $5. The coffee shop expects a maximum of 100 customers who will order one of these drinks. If the coffee shop also wants to sell more standard lattes than tea lattes, which of the following scenarios will satisfy these conditions?
Click here to see answer by ikleyn(52754) About Me 
Question 1060727: Can you please help me. I'm want to solve this system of equation using the substitution method.
-5x-8y=17
2x-7y=-17
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Question 1060739: Can you please help me. I'm want to solve this system of equation using the substitution method.
-3x+3y=4
-x+y=3
NO SOLUTION
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Question 1061132: 3x=-12;2x-y+3z=-1;3x+4-z=-7
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Question 1061193: A hot water faucet fills a sink in 5 minutes, while a cold water faucet fills it in 4 minutes, and a drain empties it in 2 minutes, Ifthe sink is full, and both faucets and the drain are open, how long does it take to empty the sink?
Click here to see answer by ikleyn(52754) About Me 
Question 1061541: Please help me solve this by using the substitution method. Thank you!
+x%5E2%2By%5E2=90+
+y=sqrt%28x%29+
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Question 1061541: Please help me solve this by using the substitution method. Thank you!
+x%5E2%2By%5E2=90+
+y=sqrt%28x%29+
Click here to see answer by ikleyn(52754) About Me 
Question 1061540: Hi, please help me solve this by substitution method. Thank you!
+2x%2By=5+
+x%5E2%2By%5E2=50+
Click here to see answer by josgarithmetic(39613) About Me 
Question 1061540: Hi, please help me solve this by substitution method. Thank you!
+2x%2By=5+
+x%5E2%2By%5E2=50+
Click here to see answer by MathTherapy(10549) About Me 
Question 1061574: Hi, please help me solve this by using the addition method. Thank you so much!
+x%5E2%2By%5E2=16+
+4x%5E2%2B9y%5E2=36+
Click here to see answer by Edwin McCravy(20054) About Me 
Question 1061575: Please help me solve this using the addition method. Thank you!
+x%5E2%2By%5E2=17+
+x%5E2-2y%5E2=-31+
Click here to see answer by Fombitz(32388) About Me 
Question 1061554: A box with an open top has a square base and four sides of equal height. The volume of the box is 360 cm3 and the surface area is 276 cm2. What are the dimensions of the box, if we know that the height is greater than both the width and the length?
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Question 1061639: -4x-2y=12
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Question 1061639: -4x-2y=12
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Question 1061800: Every boy had 5 hot dogs and 7 sodas. Every girl had 3 hot dogs and 4 sodas. Together, the children ate 51 hot dogs and 70 sodas. How many children were there?
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Question 1061798: I bought an expensive first-edition book and a fancy stand to display it. The book cost $50 more than the stand. Together they cost $56. How much was the stand?
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Question 1061799: Peaches are $2 per pound and mangos are $4 per pound. Joel bought a total of 10 pounds of fruit for $33. How many pounds of each did he get?
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Question 1061874: If 3x-4=2(y-2), find x/y, where y is not equal to 0
THANK YOU
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Question 1061902: Write the equation of the line that is parallel to the line y = -x + 3 and contains the point (4,1).
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Question 1062024: If you add Linda and Roger's bank balances, they total $35. Linda's balance is $45 more than Roger's. What are their balances?
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Question 1062020: I bought some dogs and octopi. Each dog costs $100 and each octopus costs $200. I paid a total of $2000 and got a total of 80 legs. How many of each did I get?

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Question 1062017: Children’s tickets are $3, adult tickets are $5. We sold a total of 35 tickets for $129. How many of each type did we sell?
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Question 1062022: I am planning a quilt. The package of calico fabric has 12 yards for $36, and the package of gingham has 16 yards for $48. I have $210 to spend for 90 yards. How many packages of each should I buy?
Click here to see answer by Theo(13342) About Me 
Question 1062178: Please help me find the solution to the system of equations. Thank you very much.
1.) y = x^2 - 6x + 1
y + 2x = 6

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Question 1062179: 1.) 2x^2 - 4x = y + 1
x + y = 1
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Question 1062295: Please help me find the equation of a parabola using a matrix equation, the parabola goes through (2,3) (4,2) (6,1).
in traditional polynomial form
y = ax^2 + bx + c. please show some work.
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