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

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Question 1082589: How can I solve y=-5x-17
8x+6y=-14
Click here to see answer by Fombitz(32388)

Question 1082589: How can I solve y=-5x-17
8x+6y=-14
Click here to see answer by ikleyn(52782)

Question 1082665: x+y+z=12
x-y+z=6
x-y-z=o.
So x,y,and,z=?
Click here to see answer by ikleyn(52782)

Question 1082665: x+y+z=12
x-y+z=6
x-y-z=o.
So x,y,and,z=?
Click here to see answer by MathTherapy(10552)

Question 1082673: 2x+2y-z=10
x+y+z=11
2x+y-z=7
So what is the ans.of x,y,and z
Click here to see answer by josgarithmetic(39617)

Question 1082672: 2x+2y-z=10
X+y+z=11
2x+y+-z=7
So x,y,and z =?
Click here to see answer by Alan3354(69443)

Question 1082714: The sum of the digit of the two numbers is 5.if 10 times the tens digit is added to 4 times the unit digit,the number obtained is in the reverse order of the digit of the original number.find the number?

Click here to see answer by josgarithmetic(39617)

Question 1082789: Y=4x
Y=-2x+12
Click here to see answer by josgarithmetic(39617)

Question 1082788: X=y-7
3x-y=11
Click here to see answer by josgarithmetic(39617)

Question 1083197: consider the plane x+2y-3z=2 and 15x-9y-z=2 are they parallel or perpendicular ?or neither parallel or perpendicular?
Click here to see answer by ikleyn(52782)

Question 1083319: Use the given conditions to write an equation for the line in point-slope form and in slope-intercept form.
Passing through (−9,−5) and parallel to the line whose equation is y= -4x+2
Write an equation for the line in point-slope form.
_______________________________
(Simplify your answer. Use integers or fractions for any numbers in the equation.)
Write an equation for the line in slope-intercept form.
______________________-
(Simplify your answer. Use integers or fractions for any numbers in the equation.)
Click here to see answer by josgarithmetic(39617)

Question 1083448: Solve the equation.
7(4x+5)=-5+8(8x-4

Click here to see answer by josgarithmetic(39617)

Question 1083498: 7x-4y=3
21x-12y=9
Solve the following system of equations by graphing. If the system is inconsistent or the equations are dependent, say so.
Click here to see answer by Boreal(15235)

Question 1083595: A line passes through the point (-5,4)with a slope of 3. what's the equation?
Click here to see answer by MathLover1(20850)

Question 1083806: 2x+2y+4z=18 7x+y-5z=8 3x+7y+4z=10 solve by using gross Jordan method
Click here to see answer by ikleyn(52782)

Question 1083906: Match each of the trigonometric expressions below with the equivalent non-trigonometric function from the following list. Enter the appropriate letter (A, B, C, D, or E) in each blank.
A. tan(sin−1(x/5))
B. cos(sin−1(x/5))
C. (1/2)sin(2sin−1(x/5))
D. sin(tan−1(x/5))
E. cos(tan−1(x/5))

1. x/sqrt(25+x^2)

2. (sqrt(25-x^2))/5

3. x/sqrt(25-x^2)

4. 5/sqrt(25+x^2)

5. x/25*(sqrt(25-x^2))
Click here to see answer by ikleyn(52782)

Question 1083995: Two numbers differ by 13. Their sum is 23. What are the numbers?

Click here to see answer by Alan3354(69443)

Question 1084191: x=3+y
21x+8y=-24
Click here to see answer by Boreal(15235)

Question 1084287: x+2y=8
5x-2y=4
Click here to see answer by josgarithmetic(39617)

Question 1084297: (1) 3x+y=1
-6x-3y=-2
(2) 3x-5y=15
x-2y=8
(3)-2x+y=5
8x-4y=12
(4)2(x+1)=-3y+a
3y-10=-4y
(5) 3(x-2)+2y=5
6y=2x
(6)5x-2y=4
y=-3x+a
(7)4x=5y=0
8(x-1)=10y
Click here to see answer by Alan3354(69443)

Question 1084423: m/2+n/2=13/10
3(m-n)=m-10
Click here to see answer by ikleyn(52782)

Question 1084445: Identify the variables in the algebraic expression. (Enter your answers as a comma-separated list.)
8x2 − 4xy + 7x2y2
Click here to see answer by Alan3354(69443)

Question 1084540: 2x^3+x^2-61x+30=0
Click here to see answer by MathLover1(20850)

Question 1084667: 5(4y+x+y)-12
Click here to see answer by rfer(16322)

Question 1084690: -3x + 5y = 22 (equation 1)
20y − 11 = 12x (equation 2)
This system of linear equations represents________lines.
The system of equation 1 and the equation 20y = 12x + 88 represents______ lines.
Click here to see answer by Cromlix(4381)

Question 1084748: 10x-30y=-10
2x-6y=-2
Click here to see answer by Alan3354(69443)

Question 1084747: X-3y=-11
6x-y=2
Click here to see answer by Alan3354(69443)

Question 1084745: 4x-y= -1
2x+4y=13
Click here to see answer by skerry(1)

Question 1084746: 4x=8y+4
5x-3y=5
Click here to see answer by Fombitz(32388)

Question 1084852: Need this Linear Mat Question answered: TODAY!
A police academy is training 14 new recruits. Some are working dogs and others are police officers. There are 38 legs in all. How many of each type of recruit are there?
Click here to see answer by Alan3354(69443)

Question 1084880: Need the Linear equation answered:
The United States Air Force Academy has two sizes of classrooms. The typical classrooms have 24 seats. The engineering classrooms 32 seats. If one wing has 16 classrooms with 424 seats, how many of each classroom does the wing have?
Click here to see answer by math_helper(2461)

Question 1084968: Solving with two variable systems,
Lebron and shaq combined to score 72 points. If lebron scored three times as many points as shaq, how many points did each player score?

Click here to see answer by jorel1380(3719)

Question 1084946: 3(x+8)=6(y+4)
17y -37 = 3x +7
Click here to see answer by MathLover1(20850)

Question 1084946: 3(x+8)=6(y+4)
17y -37 = 3x +7
Click here to see answer by MathTherapy(10552)

Question 1085224: two wind turbines generate a total of 57kw of power. the larger turbine generates twice as much power as the smaller one. find the power output of each turbine.
Click here to see answer by josmiceli(19441)

Question 1085244: 2x+5y=6, 8x+20y=24, how many solutions contain these lines
Click here to see answer by ikleyn(52782)

Question 1085318: A add a fast food joint three cheeseburgers and five medium shakes cost $14.38 at the same fast food joint five cheeseburgers and two medium shakes cost $12.06 what is the cost of a cheeseburger? What is the cost of a medium shake?
Click here to see answer by josgarithmetic(39617)

Question 1085352: Kevin put $12 a week into his piggy bank. After a few months, he took out $65, which left $139 in the piggy bank. Write and solve an equation to determine
the number of weeks Kevin put money into his piggy bank before taking any out.

Click here to see answer by addingup(3677)

Question 1085397: 7y-42x+7=0
Click here to see answer by ikleyn(52782)

Question 1085447: IF,,,,A&B=1100,B&C=1700,C&D=1100,D&E=3300,E&F=5300,F&A=2500,,
THEN..A=?
B=?
C=?
D=?
E=?
F=?
Click here to see answer by Fombitz(32388)

Question 1085447: IF,,,,A&B=1100,B&C=1700,C&D=1100,D&E=3300,E&F=5300,F&A=2500,,
THEN..A=?
B=?
C=?
D=?
E=?
F=?
Click here to see answer by Edwin McCravy(20056)

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