Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

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Question 107419: How do I solve by elimination: X-4Y=-23
2X+3Y=9
Click here to see answer by mathnoob(8)

Question 107410: The problem says solve 4x-3/3-2x+5/2=-19/6, I don't have a clue as to where to start solving this problem.
can someone please help me?
Thanks
Click here to see answer by Fombitz(32388)

Question 107386: Find the following if f(x) = 4x -3 f(-1)
-1 = 4(-1) - 3
-1 = -4 -3
-1 = -1
Double checking to see if I did these right
Click here to see answer by Fombitz(32388)

Question 107416: How do I solve by elimination: X-4Y=-23
2X+3Y=9
Click here to see answer by stanbon(75887)

Question 107409: I have to solve the problem 3/4(x-2)-2/5(2x-3)=1/5, can someone please help me solve this.
Thanks
Click here to see answer by jim_thompson5910(35256)

Question 107490: Hi please help me with this
thankyou
Mohammad makes bycical tires and is paid according to this y=1.25x, where y is his earnings and x is the number of tires he makes.
a)find the slope and its meaning

b)Find the y intercept and its meaning

Click here to see answer by solver91311(24713)

Question 107506: What is the slope of the line through (-5,2) and (6,7) in the standard (x,y) coordinate plane?
Click here to see answer by jim_thompson5910(35256)

Question 107503: Hi please help me with this
thankyou
A clown will come to childrens parties for a base fees plus $5.25 per child.The total fee for the party with 10 children is $102.50

a) What is the rate of change
b)Write the equation for the cost of hiring the clown , F in terms of number of children ,c
c)Graph the equation from b.
d)What does the vertical intercept represent in this situation

Click here to see answer by stanbon(75887)

Question 107553: Find the slope of any line perpendicular to the line through points (0, 5) and (-3,-4).
Click here to see answer by stanbon(75887)

Question 107555: Write the equation of the line L satisfying the given geometric conditions.
L has y-intercept (0, -3) and is parallel to the line with equation
Click here to see answer by stanbon(75887)

Question 107554: Write the equation of the line passing through the given point with the indicated slope. Give your results in slope-intercept form, where possible.
(0, 5), m = - 3/5 (3 over 5 in fraction form)
Thank you.
Click here to see answer by stanbon(75887)

Question 107556: In planning for a new item, a manufacturer assumes that the number of items produced x and the cost in dollars C of producing these items are related by a linear equation. Projections are that 100 items will cost $10,000 to produce and that 300 items will cost $22,000 to produce. Find the equation that relates C and x.
Click here to see answer by josmiceli(19441)

Question 107573: 2x-y=4
6x+3y=-18

Click here to see answer by mathnoob(8)

Question 107559: solve each equation
-b+-20=20
Click here to see answer by HyperBrain(694)

Question 107533: I need help with the following 2 questions:

#1 -3u-(5u+7)=-2

#2 -(8d-7)-63=0
Click here to see answer by jim_thompson5910(35256)

Question 107643: 3x-2y=7
5x+4y=8
Click here to see answer by jim_thompson5910(35256)

Question 107709: Describe the transformations on the following graph of f(x) = e^x. State the placement of the horizontal asymptote and y-intercept after the transformation.
For example, left 1 or rotated about the y-axis are descriptions.
a( g(x) =e^x -2
b) h(x) = -e^x
I need to find the
Description of transformation:
Horizontal asymptote:
y-intercept in (x, y) form:
For both a & b

Click here to see answer by stanbon(75887)

Question 107606: is this relation a function, if so how do I figure domain and range
(-4,4), (-2.2),(0,0),-2,-2)?
Click here to see answer by scott8148(6628)

Question 107607: is this relation a function, if so how do I figure domain and range
(-4,4), (-2.2),(0,0),(-2,-2)
Click here to see answer by scott8148(6628)

Question 107802: Determine which two equations represent perpendicular lines.
(a) y = 3\10x - 3 (that is 3 over 10 w/ an x next to the fraction)
(b) y = 3x � 3\10 (that is the fraction 3 over 10)
(c) y = - 1\5x + 3\10 (one over five and 3 over 10)
(d) y = 5x � 3\10 (3 over 10)

Click here to see answer by checkley71(8403)

Question 107804: Please show me in simple terms how to solve this. Find the equation, in slope-intercept form, of the line that passes through the points (5, 6) and (-7, 3).
Thanks

Click here to see answer by jim_thompson5910(35256)

Question 107801: Write the equation of the line which passes through the point (2, 1) and is parallel to the line with equation y = 5/2 x + 6 (that is five over 2 with an x next to the fraction).
Click here to see answer by checkley71(8403)

Question 107800: Determine which two equations represent perpendicular lines.
(a) y = 9x � 5
(b) y = x + 5
(c) y = �3x + 5
(d) y = x � 5

Click here to see answer by checkley71(8403)

Question 107799: A roof rises 2.75 ft over a horizontal distance of 15.01 ft. What is the slope of the roof to the nearest hundredth?
Thank you.
Click here to see answer by checkley71(8403)

Question 107850: Solve for y:
2x-3y=12
This is what I got:
3y=12-2x
y=12-2x over
3
y=2-4x over
3
Click here to see answer by solver91311(24713)

Question 107869: Write the equation of the line passing through each of the given pairs of points. Write results in slope intercept form. (-1,3), (4,-2) Thanks for any help I am a 30 yr old single mom returning to school after many years and OH my I am LOST.
thanks again
Heather
Click here to see answer by DID YOU SAY MATH?(1)

Question 107870: Are the following lines parrallel, perpendicular, or neither. L1 2x+4y=5 L2 x+2y=4
thanks for any help it is greatly appreciated
Heather
Click here to see answer by checkley71(8403)

Question 107883: Graph the following equation: y= -1/4x

thanks for any help
Click here to see answer by jim_thompson5910(35256)

Question 107922: Graph by first solving for y in terms of x (as an equation).
x � 3y = 9

Click here to see answer by jim_thompson5910(35256)

Question 108049: Alice Gleeson invested a portion of $32,000.00 at 9% interest and the balance at 11% interest, how much did she invest at each rate if her total income from both investments was $3,200.00?
Click here to see answer by checkley71(8403)

Question 108066: Galvanizeds nails are sold by the pound. Robert bought 2$ worth of 6 penny nails and 3$ of 8 penny nails for a total weight of 8 pounds. later he bought 1$
worth of 6 penny nails and 6$ worth of 8 penny nails for a total weight of 10 pounds. How muchper pound does each nail cost?
I did for the first equation 2/x+ 3/y=8 and the second equation I did 1/x + 6/y=10. So the equation wound be total cost/price per pound and I can't get why I'm wrong.
Click here to see answer by scott8148(6628)

Question 108162: HI please help me with this.THankyou

The equation 9C-5F+160=0 describes the relationship between tempreature,C, in degrees Celsiu, and the tempreature , F, in degrees fahrenheit.

a) express the equation in the form C=mF+b
b) Graph this relation
c) Identify the slope and the C intercept and explain what they mean
Click here to see answer by Fombitz(32388)

Question 108161: HI please help me with this.THankyou

The equation 9C-5F+160=0 describes the relationship between tempreature,C, in degrees Celsiu, and the tempreature , F, in degrees fahrenheit.

a) express the equation in the form C=mF+b
b) Graph this relation
c) Identify the slope and the C intercept and explain what they mean
Click here to see answer by MathLover1(20849)

Question 108096: 2/3x+1/2y=2
4x+3y=12
This system of equations is
a. non-linear
b. inconsistent
c. dependent
d. consistent
Click here to see answer by Fombitz(32388)

Question 108268: I have to graph this problem and not sure how to do it.
Graph y=3x

Click here to see answer by Annabelle1(69)

Question 108356: The answer to 3y=-4/3x
Click here to see answer by MathLover1(20849)

Question 108209: Find the remainder when is synthetically divided by a+1/2.
Click here to see answer by Edwin McCravy(20055)

Question 107910: A line passing through (9, 18) and (6, y) is parallel to a line with slope 3. What is the value of y?
Thank you.
Click here to see answer by scott8148(6628)

Question 108411: I need help with the question:
Find the equation of the line parallel to 2x+4y=9 and passing through the point(6,-2).
I tried to use y=mx+b, but I still can not figure it out.
Click here to see answer by checkley71(8403)

Question 108594: Solve the system of equations using the addition (elimination) method. If the answer is a uqique solution or infinitely many solutions
9x + 2y =2
3x + 5y = 5
Click here to see answer by checkley71(8403)

Question 108624: What is the relationship between y=4x+24 and 2y=8x+12? Are they perpendicular, parallel, or neither? Please answer as soon as possible. Thank you!!
Click here to see answer by checkley71(8403)

Question 108625: Find the slope of 3x-2y=8
Click here to see answer by checkley71(8403)

Question 108626: Find the slope of 3x-2y=8
Click here to see answer by checkley71(8403)

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