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

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Question 124899: x punds of candy valued at $3.50 per pound is mixed with y pounds of candy valued at $4.30 per pound to produce 10 pounds of a mixture selling for $4 per pound. Find x and y, the number of pounds of each type.
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Question 124898: A total of $10,000 is invested in two funds paying 5% and 7% annual interest. The combined annual interest is $644. How much of the $10,000 is invested in each fund?
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Question 125067: Calvin paid his $1.35 skate rental with dimes and nickels only. There were 19 coins in all. How many of each coin were there?
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Question 125089: There were 166 paid admissions to a game. The price was $2.00 for aduls and $0.75 for children. The amount taken in was $293.25. How many adults and how many children attended?
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Question 125188: Find the x-intercept. y=x^2+x-6
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Question 125278: A jar contains 5-gram bolts and 10-gram bolts. The contents of the jar weigh 2.35kg. If there are 300 bolts altogether, how many are there of each kind?
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Question 125463: Three times the larger numbers is equal to four times the smaller. The sum of the numbers is 21. Find the numbers.
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Question 125690: One number is 12 more than another.The sum of the smaller number and twice the larger number is 39. Find the larger number.
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Question 126227: solve the system by addition method. if a unique solution doesn't exist, state whether the system is inconsistent or dependent.
2x-3y+z=5
x+4y-2z=-3
4x-2y+3z=6
I could really use some. I am pulling out my hair. Please.

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Question 126223: divide (45x^3+20x^2)/5x
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Question 126269: Solve each of the following systems by graphing.
2x - y = 4
2x - y = 6

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Question 126350: x-5y=9
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Question 126352:
Solve each of the following systems by substitution.
5x - 2y=-5 y - 5x = 3

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Question 126352:
Solve each of the following systems by substitution.
5x - 2y=-5 y - 5x = 3

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Question 126422: Factor completely. 3x^2 + 4x – 15
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Question 126419: Factor. 3x(x + 2y) + 7(x + 2y) im not sure how far I can take this.
I have 3x^2+6xy+7x+14y am i right or do I need to go more?

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Question 126439: Identify the axis of symmetry, create a suitable table of values, then sketch the graph (including the axis of symmetry).
y = –x² + 3x – 3

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Question 126602: Find values for m and b in the following system so that the solution to the system
is (-3, 4).
5x + 7y = b
mx + y = 22

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Question 126599: Solve each of the following systems by substitution.
8x - 4y = 16
y = 2x - 4

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Question 126884: Could you please help me solve this? find the center (h,k) and radius r of the circle. I have no idea how to work out.
x^2+y^2-12x+6y+35=0

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Question 126885: Factor by grouping. 48x^3 + 42x^2 – 8x – 7 im kinda at a loss right now with this one, please help.
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Question 126955: solve this system of equation by graphing
1. 3x-6y=-9
2x-4y=-6
2. x+y=-6
-x+2y=6

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Question 126964: solve by substitution
1. 4x + 5y= 6
y=2x - 10
2. 4x-3y=0
y=x+1

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Question 126980: solve by substitution
1. 2x - y= -4
x+y = -5

2. 5x - 6y=21
x -2y=5

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Question 126978: solve by addition If a unique solution does not exist, state whether the system is incosistent or dependent
1. 5x + 4y=7
5x - 2y =19

2. 3x -4y=2
4x -4y = 20

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Question 126979: the length of a rectangle is 3in. less than twice its width. If the perimeter of the rectangle is 145 in. find the dimension of the rectangle.
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Question 126958: felix has 35 coins consisting of dimes and nickles. If the value of his coins is $3.30, then how many of each type does he have?
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Question 127287: 6x-y=-2
-18x+3y=4

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Question 127286: -5x+2y=-10
3x-6y=-18

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Question 127285: 4x+6y=15
-x+2y=5

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Question 127283: 3x+y=1
-6x+6y=-18

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Question 127282:

x=-3y+2 -x+2y=3

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Question 127298: 3x-y=4
-9x+3y=-12

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Question 127332: slove linear equation
-5x+8y=-22

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Question 127357: Please help, I'm stuck!
(Modeling)
In electronics, circuit gain is modeled by
G = Bt/R + R(base)t
Where R is the value of the resistor, t is temperture, R(base)t is the value of R at room temperture t and B is constant. The sensitivity of the circuit to temperture is modeled by
S = BR/(R + R (base)t)^2
If B = 3.7 and t is 90 K, find the values of R and R (base)t that will make G = .4 and S = .001.
I huge thank you to anyone who can get me goingon the right track.

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Question 127387: Solve by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
1. 5x + 4y = 7
5x – 2y = 19

2. 3x – 4y = 2
4x – y = 20

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Question 127378: Find values for m and b in the following system so that the solution to the system is (-6, 8).
5x + 7y = b
mx + y = 22
m = , b =

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Question 127483: Brazil nuts sell for $5 per pound and walnuts are sell for 3.50 per pound. How much of each type of nut would be needed to create 30 pounds of a mixture that would sell for $4 per pound?
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Question 127483: Brazil nuts sell for $5 per pound and walnuts are sell for 3.50 per pound. How much of each type of nut would be needed to create 30 pounds of a mixture that would sell for $4 per pound?
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Question 127482: Solve by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
4x – 3y = 22
4x + 5y = 6

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Question 127480: Solve this system of equations by graphing:
x – 2y = -2
x + 2y = 6

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Question 127480: Solve this system of equations by graphing:
x – 2y = -2
x + 2y = 6

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Question 127484: Solve the system of inequalities by graphing:
2x + y < 6
y > 1

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Question 127377:
x – 2y = -2 x + 2y = 6
Solve this system of equations by graphing

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Question 127777: Solve this system of equations by graphing:
x – 2y = 8
3x – 2y = 12

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