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mathematics: algebra;equations

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mathematics: algebra;equations
wuts the answer for -12 + 5u= -48

Mathematics
Q 1 . Change the following polar equations into Cartesian equations: (a) r = a sin 2 A (b) A=π/4

math
1. Select any two integers between -12 and +12 which will become solutions to a system of two equations. 2. Write two equations that have your two integers as solutions. Show how you built the equations using your integers. Your solution and equations should not be the same as...

Mathematics
Among 500 freshmen pursuing a business degree at a university, 313 are enrolled in an economics course, 205 are enrolled in a mathematics course, and 153 are enrolled in both an economics and a mathematics course. What is the probability that a freshman selected at random from...

Mathematics
x-z=7 x+y=3 z-y=6 For the above system of three equations x= ?

Mathematics
1). Solve the following simultaneous equations. a) 3/x + 5/y = 4, 9/x + 4/y = 5 b) 3x +y - 1/2 = 2x -1/3 = 5x - 2y + 1/5

mathematics
If the line l has parametric equations x=5-3t, y=-2+t, z=1+9t, find the parametric equations for the line through p(5,4,-3) that is parallel to l.

Mathematics
3x - 21 = 2y 3y = 84 - 6x Using the two equations above, solve for y. A.11 B.35 C.-6 D.6

mathematics
how to solve exponatins equations by trial and error

Mathematics
Parametric Equations x = 9s^2 - 1 y = 1 - 8s^3 Find the cartesian equation?

Mathematics
How to use graphs to solve quadratic equations

Maths
what are the meanings of Mathematics of Buying and Mathematics of Selling, using language from the Business Mathematics aspect.

Algebra
Translate to a system of equations. DO NOT SOLVE. A nontoxic scouring powder is made up of 4 parts baking soda and 1 part vinegar. How much of each ingredient is needed for a 16-oz mixture? What are the two equations? For most problems, I can easily find the info for the two ...

Algebra 2
1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8 7x-4y=11

Algebra 2
1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8 7x-4y=11

Algebra 2
1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8 7x-4y=11

mathematics
use inverse method to solve the system of linear equations x+y+z-4 =0 2x-3y+4y-33=0 3x -2y -2z -2= 0

mathematics
Determine the equations of a straight line passing through (-6;-2) and pependicular to 3x+2y=6

mathematics
Determine the equations of a straight line passing through (-6;-2) and pependicular to 3x+2y=6

engineering mathematics
Write down 4 equations of horizontal linear motion and quantify them

probability
out of 250 students interviewed at a community college, 90 were taking mathematics but not computer science, 160 were taking mathematics, and 50 were taking neither mathematics nor computer science. Find the probability that a student chosen at random was a. taking just ...

Additional Mathematics
Showing your working clearly, solve the following simultaneous equations: y+5x=3 2x^2-1=3xy+y^2

mathematics
Solve the following differential equations: (I). Cos x dy/dx + ysin x= sec^2 x (II). Y"-10y' + 41y=0

algebra
solve the system of equations by graphing. Then classify the system as consistent or inconsistent and the equations as dependent or independent. x+y=14 x-y=2 What is the solution of the system of equations?

FOR MATHMATE
Media services charges $40 for a phone and 20/mth for its economy plan. It says to find a model that determines the total cost, C(t), of operationg a media Services phone for t months. I think the answer should be in this equation - y = mx+b. Not sure. Algebra/Equations,...

Mathematics
Of the 82 pupils in grade 9, 73 take mathematics 56 take science, all those who take science take mathematics. Show the information on the venn diagram. How many take neither mathematics nor science?

algebra 2
Solve system of equations.Describe each step if your solution. W+X+Y+Z=2 2W-X+2y-Z=1 -W+2x-y+2z=-2 3w+x+y-Z=5 Please help I only know how to do this with 3 equations.

Algebra Quadratic Equations
What are the pros and cons of completing the square as a way to solve quadradic equations?

algebra 2
How does writing equivalent equations help you solve a system of equations?

algebra 1
I'm stuck on this problem. Can you help? -4x-9y=1 -x + 2y =-4 WHat is x and y? Two equations in two unknowns. Here is a quick way to solve them -4x - 9y = 1 4x - 8y = 16 (I got that my multiplying both side so the secind equation that you provided by -4) Now add the two ...

Algebra
Find the number of solutions for this system of equations. 3x + 5y = 20 -2x +5y = 20 How can I do this (and for other systems of equations) without taking all day? Thanks!

algebra
_2__ = ____2___ x-9 x^2-6x-27 Solve the equations Check solutions to the equations (plug the answer back into the original equation.)

algebra
Given an equation of a line, find equations for lines parallel or perpendicular to it going through specified points. Find the appropriate equations and points from the table below. Simplify your equations into slope-intercept form. The equation is y=3x+3 (-1,_-1)

Mathematics
Parametric Equations x = 9s^2 - 1 y = 1 - 8s^3 find dy/dx in terms of s find the coordinates of stationary points

College Algebra
Solve the system of equations with ROWOPS program. I know how to do the first step but after that it gets difficult for me, this is the system of equations: 3x + y - z = 1 x + 2y - z = 0 2x - y + z = 4 I used to be able to do these but now I'm getting a little rusty. Thanks ...

algebra
How do I do substitution equations out of the equations in the system, pick the one that has the least amount of funky numbers. then make that equation equal to either x or y(or any other variable dependin on what kind of systems youre doing, usually just x and y in algebra 1...

Algebra
To solve the following system of equations by elimination, which step would best to perform first? 1/2a - 1/4b = 1 1/3a + b= 3 A. Add the two equations. B. Subtract the two equations. C. Multiply the first equation by 4. D. Divide the first equation by 3.

mathematical methods for economics
in a class of 300 students,they were given mathematics test in three subjects namely,economics,statistics and mathematics,90 students failed in economics,100 failed in statistics,96 failed in mathematics,60 failed in economics and statistics,64 failed in statistics and ...

Maths
Among the examinees in an examination 30%, 35% and 45% failed in Statistics, in Mathematics, and in at least one of the subjects respectively. An examinee is selected at random. Find the probabilities that a. He failed in Mathematics only b. He passed in Statistics, if it is ...

Chemistry
When solving Hess law problems,do we need to use all the equations given to get the Htotal or just choose the relevant equations that are related to the final equation required? Let's say there r 5 equations given,but the relevant equations are 3 only ,so we can neglect the ...

IGNOU probability
Among the examinees in an examination 30%, 35% and 45% failed in Statistics, in Mathematics, and in at least one of the subjects respectively. An examinee is selected at random. Find the probabilities that a. He failed in Mathematics only b. He passed in Statistics, if it is ...

Mathematics
Solve the following system of linear equations using the matrix inverse method. \begin{array}{ccc} 3x+2y&=&7 \\ 4x+3y&=&10\end{array}

Math 116
Consider the following system of equations. y=2x-2 y-2x=9 What can you conclude about the system of equations? a. The system of equations is inconsistent. b. The system of equations is dependent. c. The system of equations is independent. d. none of these.

Mathematics
How do i solve the pair of simultaneous equations y=x^2-3x-12 and y=2x-16 and epxress y=x^2-3x-12 in the form y=(x-h^2)+k, where h and k are constants Hence determine the minimum value of the function y=x^2-3x-12 I have a few of these to do, so if someone can just show me how ...

Math 1
Consider the following system of equations. y = 4x - 4 y - 4x = 3 What can you conclude about the system of equations? A) The system of equations is inconsistent. B) The system of equations is dependent. C) The system of equations is independent. D) none of these

math
Consider the following system of equations. y = 2x - 2 y - 2x = 7 What can you conclude about the system of equations? The system of equations is inconsistent. The system of equations is dependent. The system of equations is independent. none of these

Algebra 2 (Diophantine Equations)
Find all positive integer solutions for 13x + 9y = 190 using Diophantine equations.

algebra
Can someone please help. When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent? Thanks

pre-algebra help
Determine which two equations represent perpendicular lines. (a) y = 3/10x -3 (b) y= - 10/3x -3 (c) y = -1/5x + 3/10 (d) y = 1/5x – 3/10 Equations (a) and (b) are perpendicular t one another, because the product of the slopes is -1.

College Algebra
solve systems of equations by graphing... I get how to graph and solve equations but i just don't understand why its coming out wrong u=v 4u=3v-3

pre algebra
Check whether (-4, -12) is a solution of the system of equations. y = 6x + 12 2x - y = 4 When the graphs of two equations are parallel, there are infinitely many solutions. y = x + 4 y = 3x solution: ( , )

algebra ll
solve the system of equations 4x - 3y= 8 2x+ 5y= 9 mutiple choices are (1,1), (5,2) 1(-4,-10) or (2,-2)and choose the correct description of the system of equations. 2x+3y=10 and 4x+6y equals 20 thank you for the help

algebra
Try graphing the following two equations. Eq 1 y = 2x + 3 Eq 2 y = 2x + 1 How are these two lines related? What is the solution for this systems of equations?

math algebra 1
Who is the inventor of the FOIL method? some one answer me!! The history of mathematics in India is ancient. The Hindu Vedic tradition is an oral tradition of knowledge passed down in short verses, dating to before the invention of paper. The Vedas encompass a broad spectrum ...

algebra
Can someone help me figure this out please? when you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent? thank you anyone

Algebra
Given the equations y=16 and y=3. Determine the slope and y-intercept if any exist. I have determined that the slope is 0 for both equations because it is a horizontal line, but I don't know what the y-intercepts are?

Algebra
How do I put these two equations below into a Table with at least 5 point. 2x-y=2 4x-2y=8 Important question: Am I suppose to have 1 table for each equations.

Algebra
40 =15 x x - 20 This is a three part question>> first find the lcd method of solving this equations, and the second ones about cross-multiplying method to solve this equations ,The next question asked would the cross- multiplying method work for all rational equations?? ...

algebra
when you solve a system of equations by the substitution method, how do you determine whether the system of equations is dependent?

algebra
When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent?

Algebra
I can find no solution to this system of equations. Solve the system of equations using the substitution method 2x + 4y = -2 2x - y = 4

Algebra
Solving systems of linear equations in 3 variables... 1) 3x-2y+2z=1 2) 2x+5y-5z=7 3) 4x-3y+z=-3 I combined 1 and 3 to get -5x+4y=7 And then i combined 2 and 3 to get -13y+11z=-17. Can that be right? how would you combine those two equations?

mathematics-abstract equations
x+y+√z=148 x+√y+z=82 √x+y+z=98 find x,y,z given that x,y,z are all positive integers. Please i need the solution #thanks

Algebra
Solving Linear Equations - Elimination Write whether each of these systems of equations has a common solution or not. Explain y = -x + 2 Y = 2x + 1 If you show me one and explain it, then I can probably do the rest...Thanks

algebra 2
for the equations y=x and y=|x|....i need help on give one similarity and one difference for the equations and graphs

Algebra (Quadratic Equations)
Is the point (-3, -2) a solution of the intersection of the following set of quadratic equations: Y < - X ^ 2 X^2 + Y^2 < 16

College algebra
system of linear equation The sum of 3 numbers is 14 the largest is 4 times the smallest the sum of the smallest and twice the largest is 18 what are the 3 numbers? show work? A. how many unknowns you have? -how many equations need to be solve for that many unknown? B. what ...

Algebra
Please help me to solve these two equations step by step. They are quadratic equations 1).2x^2+9x+4=0 2).5x^2=-7x

Algebra
Solve the system of equations: First:x+3y=5 Second:3x-y=5 multiply the second equation by 3 then add both equations(I know I have it wrong somewhere I just guessed at the solution and it worked. I got (2,1)

Mathematics
write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

Mathematics
write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

Mathematics
write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

Mathematics
write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

Mathematics
write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

Algebra
Find the number of the solutions to each system. a. 4x-y+1=0 4x-y+3=0 b. 2x-y+4=0 4x-2y+8=0 Write a question that can be solved using a system of linear equations. Solve the following system of equations by graphing: y=x+3 and y=-2x-3

algebra 1
Got a test tomorrow... Say you have a system of equations (linear), that you can solve using substitution, graphing, or elimination. Without solving the equations, can you tell if there is one solution, many solutions, or no solution?

Algebra 2 (Diophantine Equations)
Solve 5x + 12y = 47 using Diophantine equations.

Algebra
Help Pleasee! Rational Exponet equations 1. 3x^5/2- 9 = 0 2. (2x+3)^1/2=4 Equations With rational expressions: 1. 3/x+3 - 1/x-2 = 5/2x+6

mathematics
how can you do the lcm to somethimg like 12000 without having to do all of that mathematics just to make it quicker?

algebra uno help + check?
So, I've got these other sets of problems, that are telling me to write equivilant equations for the equations given, heres what I think. 1) x+y=-10 -5+5=10 -5(2)+10 2) 5x+10y=15 5x(3)=15 5x+10=15 3)-x+2y=9 y=3(3)=9 3+6=9 Heres what I need YOU tutors to help me with: Could you...

Discrete Mathematics
The augmented matrix A represents a system of three real-valued equations in three unknowns. Which of the answer choices would result from the usual first step of applying Gauss-Jordan elimination?

Discrete Mathematics
15. The augmented matrix A represents a system of three real-valued equations in three unknowns. Which of the answer choices would result from the usual first step of applying Gauss-Jordan elimination? A = (1 4 2 3) A = (2 9 13 18) A = (3 10 8 15)

University studies
According to the Center for Mathematics Excellence, which of the following is a math myth? A. Knowing the rules and how to use them is the most important part of math. B. Even people who are highly skilled in mathematics and science find these subjects to be challenging C. ...

mathematics
how do I cope with intermediate mathematics e.g log rhythms?

Math
In a class of 550 students, students may take all, none, or a combination of courses as follows.? Draw a Venn diagram to find how many students are not in any of these courses. Mathematics-280 Science-200 Technology-230 Mathematics and Technology-110 Science and Technology-100...

algebra
Can someone please help. Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations. Thanks

Algebra
6. y = 2x - 1 and y = x + 3 ***A. (4,7) B. (7, 4) C. (-7, -4) D. infinite solutions 7. y = 4x and y + x = 5 A. (-4, 1) B. (1, 4) C. (-3, 2) ***D. (2,3) 8. What will the graph look like for a system of equations that has no solution? A. The lines will be perpendicular. ***B. ...

algebra
I need help. Can someone help me please. Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations. Thank you

Algebra 2 (Quadratic Equations)
Is the point (-3, -2) a solution of the intersection of the following set of quadratic equations: Y < -X^2 X^2 + Y^2 < 16 I'm not sure how to actually work this problem out. Can anyone help me with this problem please.

algebra
When I subsitute 5x+3 into the equation I get x=1/5 and y=2 is this correct? Try plugging in your final values for x and y into both of the original equations. If and only if the equations are true, then your answers are correct.

ALGEBRA
how many permutations are there of the following word. mathematics

mathematics-Algebra
3^x=9x please show workings

algebra
Solve the system of linear equations by graphing 3x+y=0 2x-y=5 Graph the system What is the solution of the system of equations?

Algebra
When equations have infinitely many solutions, How would you know this? also, when working on equations that has no solutions, How would I know this? If posible can you give me examples of each. Thank you

College Algebra
Solve the system of equations. Then classify the system. 7x-7y= -42 -7y-7x=42 What is the solution of the system? Is the system inconsistent or consistent? Is the equations dependent or independent?

algebra
Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations.

mathematics
x,y and z are complex numbers that satisfy the equations x+y+z=2, xy+yz+zx=3 and xyz=4. Given that 1/(1−x−yz)+1(1−y−zx)+1(1−z−xy)=ab, where a and b are coprime positive integers, what is the value of a+b?

Chemistry
What are the equations for these two equations? Not net ionic equations. a) Nickel (II) chloride and iron b) Sodium and water

ALGEBRA/EQUATION
I believe I have the answers already. Just need confirmation please! Solve the following system of equations. x + 2y = 5 x = 2 - 2 y; For the first equation, I canceled out the x and divided by 2 on both sides. So y = 5 - x/ y. For the second equations, this is what I got. x...

Algebra
Create a system of equations that includes one linear equation and one quadratic equation. Part 1. Show all work to solving your system of equations algebraically. Part 2. Graph your system of equations, and show the solution graphically to verify your solution.

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