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

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Question 148183: Find the missing values that solve this equation.
y = 5 -4x
(5, ____) (1, ____) (-1, ____)

I need the missing points and the steps :)
Click here to see answer by mangopeeler07(462)

Question 148197: Write an equation of a line with a slope of 2/3 and y-intercept of 7. Write the equation in both slope intercept form and standard form.
Click here to see answer by mangopeeler07(462)

Question 148200: You are sliding a big cabinet down a truck ramp for a customer. You must maintain control of the cabinet because it is very heavy. There are 2 ramps in the building.
The equation of ramp 1 is y = 2x + 7 and the equation of ramp 2 is y = 3 x + 7. Which is the safest ramp to slide the cabinet down without losing control and why?

Click here to see answer by jim_thompson5910(28476)

Question 148199: Write the equation of a line whose slope is 6 and whose y intercept is -3.
Click here to see answer by jim_thompson5910(28476)

Question 148199: Write the equation of a line whose slope is 6 and whose y intercept is -3.
Click here to see answer by mangopeeler07(462)

Question 148243: Solve the system of equation:
3x+2y=11
2x-2y=4
Solve the system:
2x-y+2z=11
3x-2y-z=12
x-3y-z=1
Click here to see answer by mangopeeler07(462)

Question 148162: hi, i need exactly step by step solution using elimination and substitution method and check.thank u
3y=7-2x
5y=7y-3

Click here to see answer by Alan3354(30968)

Question 142066: do I multiply entire equation by lcd even though it is only a subtraction question?
Click here to see answer by Alan3354(30968)

Question 148273: Could you please help me with this problem. I am supposed to use a system of equations to solve this question.
A chemist needs 10 liters of a 60% alcohol solution. She has 30% and 80% alcohol solutions available to mix. How many liters of each need to be mixed to obtain 10 liters of a 60% alcohol solution?
Thank you very much!
Click here to see answer by ankor@dixie-net.com(15625)

Question 148274: Could you please help me with this problem. I am supposed to use a system of equations to solve this question.
I have 30 coins worth $6.00. The coins are quarters and dimes. How many of each do I have?
Thank you very much!
Click here to see answer by Alan3354(30968)

Question 148283: Find the equation of the line parallel passing through 3x+y=7. x=2;y=1 3/4
Click here to see answer by nerdybill(6948)

Question 148280: 1. in interval notation, what is the range of F(x)=2x^3-4x-7 (i'm thinking that this range cannot be determined, am i correct.)
2. which of the following is a line perpendicular to y=_x+4 y=_x-_, y=2x-4,y=2x-_, or y=-2x
3. what is the slope of the line that passes through(-4,-2) and the origin
M=_, B=_, M=-_ or insufficient information given
4. two lines are parallel if m1=(-m2)-1, m1=-m2, m1=m2, or none of the above (i'm thinking none of the above is this correct)
5.f(x+h)-f(x) is this the numerator of the different quotient

Click here to see answer by stanbon(57224)

Question 148298: find x:
2 sqrt of x-3 = 12
Click here to see answer by nerdybill(6948)

Question 148334: Which line is the flattest (or is less steep)? Why?
y = 5x -6
y = 5x + 6
y = x - 3
y = 1/2x + 3

Click here to see answer by Alan3354(30968)

Question 148337: Find the slope of a line containing these points.
(5,-2) & (-3,2)
need help and steps
Click here to see answer by Alan3354(30968)

Question 148335: The line y = 4x - 7 crosses the y axis at:
(4, 0)
(0, 4)
(-7, 0)
(0, -7)

Click here to see answer by Alan3354(30968)

Question 148345: What is the slope and y-intercept of the line represented by the equation
y = (3/8)x - 5?
slope = 3/8, y-intercept = 5
slope = 5, y-intercept = 3/8
slope = 3/8, y-intercept = -5
slope = -5, y-intercept = 3/8

Click here to see answer by Earlsdon(6287)

Question 148344: The point (2, -5) is a solution to which of the following equations?
y = -3x + 1
y = -3x - 5
y = -3x - 3
y = -3x + 5

Click here to see answer by Edwin McCravy(8880)

Question 148343: Give three ordered pairs that are solutions to the equation 3x - y = 8.

Click here to see answer by Edwin McCravy(8880)

Question 148339: Solve the System:
2x-y+2z=11
3x-2y-z=12
x-3y-z=1
Click here to see answer by Electrified_Levi(103)

Question 148379: 5 4 1 Solve the following literal equation for y.
___ - ____ = ___
a y b
Click here to see answer by mangopeeler07(462)

Question 148379: 5 4 1 Solve the following literal equation for y.
___ - ____ = ___
a y b
Click here to see answer by stanbon(57224)

Question 148374: How would I go about solving a system of equations with three equations and three variables.
4x-4y-z=38
x+4y-3z=6
-3x+2y-z=-14
Please explain step by step, I would appreciate it. Thank you.
Click here to see answer by Fombitz(13828)

Question 148914: I need help on these two questions
1. Solve for x when [5x-7]=14
2. Multiply the complex numbers (4+3i)(6+i)
Click here to see answer by mangopeeler07(462)

Question 148917: Solve the system of linear equations by the substitution method. Then, state whether the system is independent, dependent, or inconsistent.
-x+7y=4
-x+7y=3
Click here to see answer by nabla(475)

Question 148873: 4-(y-3) = x+3 1st equation
10+x
―—―— = 2+(y-12) 2nd equation
3

Click here to see answer by Electrified_Levi(103)

Question 148936: y = 3x + 2
2x + y = - 8

Click here to see answer by checkley77(12569)

Question 148936: y = 3x + 2
2x + y = - 8

Click here to see answer by stanbon(57224)

Question 148874: 4-(y-3) = x+3 1st equation

10+x = 2+(y-12)2nd equation
----
3

Click here to see answer by Alan3354(30968)

Question 149098: Problem: Joe has a collection of nickels and dimes that is worth $5.65. If the number of dimes were doubled and the number of nickels were increased by 8, the value of the coins would be $10.45. How many dimes does he have?
Click here to see answer by ankor@dixie-net.com(15625)

Question 149113: Find the solution by substitution:
3x-2y=-5
x=y-2
Click here to see answer by checkley77(12569)

Question 149142: Find the solution by substitution:
4x+3y=5
2x-y=-5
Click here to see answer by mangopeeler07(462)

Question 149111: Find the solution by substitution:
4x+3y=5
2x-y=-5

Click here to see answer by Alan3354(30968)

Question 149112: Find the solution by substitution:
3x+8y=22
10x-2y=16
Click here to see answer by 24HoursTutor.com(40)

Question 149211: -x + y = 4
2x - 5y = -14
I am completely stuck on how to go about doing this problem.
I know that the Solutions x and y are always intergers between 5 and -5.
Each time i try I come up with No Solution.
But I am being told that is wrong.
x = ?
Y = ?
If you could, please show me a few steps on How to get the answer
to this problem.
I would greatly appreciate your help
Thank You,
Kerry G.
Click here to see answer by Fombitz(13828)

Question 149291: Solve the system of equations.
1.25x – 2y = 1.3125
x + 2y = –0.75

A) {(1.75, 1.5)}
B) {(0.75, 0)}
C) {(0.25, –0.5)}
D) {(1.75, –0.5)}
Click here to see answer by stanbon(57224)

Question 149290: If the circumference of a circle is 12 meters, then what is its diameter?
Click here to see answer by jim_thompson5910(28476)

Question 149287: Write the slope-intercept equation of the line l that goes through (12, 3) and has a slopeof 1/3
.
Click here to see answer by Alan3354(30968)

Question 149287: Write the slope-intercept equation of the line l that goes through (12, 3) and has a slopeof 1/3
.
Click here to see answer by checkley77(12569)

Question 149285: Find the equation (in standard form) of the line through (1, –7) and (4, –1). Match your result to the correct answer below.
A) 2x + y = 9
B) x-2y=18
C) 2x – y = 9
D) x-2y=9
Click here to see answer by Alan3354(30968)

Question 149286: Determine whether the lines l1 and l2 are parallel, perpendicular, or neither.
Line l1 goes through (3, –8) and (–3, 9). Line l2 goes through (–1, –5) and (–7, 12).
Click here to see answer by Alan3354(30968)

Question 149378: the sum of digits of two digit number is 5 . the digit obtained by increasing the digit in tens place by units 1/8 of the number . find the number

Click here to see answer by stanbon(57224)

Question 149509: Complete the equation of the line L satisfying each of the following sets of geometric conditions by determining the value of b1 and b0.
L passes through point (0,-4) and is parallel with the line 3x - y = 6. (y = b1x + b0) I got b1=-3 and b0= -4. Is this right.
Click here to see answer by stanbon(57224)

Question 149515: How do I solve the following system of linear equation
5x + 4y = 40
x + 2y = 11
Click here to see answer by Alan3354(30968)

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