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

Tutors Answer Your Questions about Linear-equations (FREE)

Question 1073393: find an equation for the line and write the equation in standard form
*through the origin and (7,-8)
my answer for the equation in standard form was 7x-y=8 i don't how i got it wrong i did all the steps.
for the slope i got m=-8/7
is my slope wrong??
Click here to see answer by math_helper(2461)

Question 1073287: suppose that a firm manufactures mp3 players and sells them for r50 each. the cost incurred in theproduction and sale of the mp3 players are r200000 plus r10 for each player produced and sold. write the profit function for the production and sale of x players?
Click here to see answer by jorel1380(3719)

Question 1073388: Halley's law states that the barometric pressure (in inches of mercury) at an altitude of x mi above sea level is approximated by the equation below.
p(x) = 29.92e^-0.2x (x ≥ 0)
If the barometric pressure as measured by a hot-air balloonist is 21 in. of mercury, what is the balloonist's altitude? (Round your answer to two decimal places.)
=
Click here to see answer by jorel1380(3719)

Question 1073480: Solve the system of linear equations by substitution. Check your solution.
y = 2x + 3
y = 5x
Click here to see answer by josgarithmetic(39617)

Question 1073559: A bookcase is to be constructed as shown in the figure. The length is to be
22times the height. If44 feet of lumber is available for the entire unit, find the length and height of the bookcase.

Click here to see answer by Fombitz(32388)

Question 1073568: Express y in term of x in equation x-y+1,and
piex +3y=25
Click here to see answer by Fombitz(32388)

Question 1073579: Can you help me find:
Find an equation of a linear function given h(1)=6 and h(4)=-3
Click here to see answer by Fombitz(32388)

Question 1073630: Solve the system of linear equations by substitution. Check your solution.
4x + 2y = 0
y = 1/2x - 5
Click here to see answer by addingup(3677)

Question 1073636: Solve the system of linear equations by substitution. Check your solution.
x = 5y + 3
2x + 4y = -1

Click here to see answer by ikleyn(52781)

Question 1073737: -x+y+4=0 i need to understand how get the slope and the y intercept
Click here to see answer by Fombitz(32388)

Question 1073748: The equation of a line is y= -4x+1. WHat is the equation of the line that is parallel to the first line and passes through (-2,-1)

Click here to see answer by Fombitz(32388)

Question 1073761: Find the equation for the line that passes through the point (5, -3), and that is perpendicular to the line with the equation x = -4. I would appreciate if someone could show me how to do this??
Click here to see answer by Fombitz(32388)

Question 1073765: Find the equation for the line that passes through the point (−3, −1)and that is parallel to the line with the equation y = 1/2x − 3
Click here to see answer by stanbon(75887)

Question 1073795: find an equation for the line. write the equation in standard form.
*through (1,-8) and parallel to x=-5
the slope i got was -8/6 did i get my slope right?
Click here to see answer by josgarithmetic(39617)

Question 1073794: find an equation of a line. Write the equation in standard form.
through (3,-7) and (-1,10)
the slope i got was -17/4 did i get the slope right?
Click here to see answer by josgarithmetic(39617)

Question 1073828: A solution to a system Determine whether the point (-1, 3) is a solution to each system of equations.
a) 3x-y=-6
x+2y=5
b) y=2x-1 x
x + y = 2
Click here to see answer by ikleyn(52781)

Question 1073864: In the linear equationx-y-1=0,if x=0,then find the value of y
Click here to see answer by josgarithmetic(39617)

Question 1073817: Find the pitch of a roof. 2.8ft by 8.2ft.
Click here to see answer by Edwin McCravy(20055)

Question 1073882: 3x-9y=6 slope and y-intercept
Click here to see answer by Fombitz(32388)

Question 1073936: Hi! I have to find the point of intersection between these two lines: x-y=3 and -2x+y=-5. I have tried substitution, but that did not work, and elimination seems like it would not work. Thank you!
Click here to see answer by ikleyn(52781)

Question 1074080: the length of a rectangle is 7cm more than twice the width. the perimeter is 86cm. find the dimensions of the rectangle.
i tried this
86=2(7)+2w
86-14=2w
72/2=2w/2

but i keep getting the wrong answer
Click here to see answer by josgarithmetic(39617)

Question 1074070: What are the angles in a �regular� 5 pointed star? Show me algebraically
Click here to see answer by ikleyn(52781)

Question 1074176: What is the slope of a line perpendicular to the line whose equation is y=3x+4?
Click here to see answer by josgarithmetic(39617)

Question 1074169: Parallel to 4
xplus8yequals9,
passing through (1,4
).
Click here to see answer by josgarithmetic(39617)

Question 1074209: Linear inequalities:2x-5 < x-2
Solve on a number line

Click here to see answer by ikleyn(52781)

Question 1074347: find the equation of the straight line that passes through points (-1; -2) and (3;4)
Click here to see answer by DENNIS DON(8)

Question 1074342: If C=2(l+w) m
make w the subject of
the formula

Click here to see answer by josgarithmetic(39617)

Question 1074343: If C=2(l+w)
make w the subject of
the formula

Click here to see answer by Alan3354(69443)

Question 1074404: Set up a linear system and solve.

Click here to see answer by Alan3354(69443)

Question 1074425: Find the equation (in terms of x) of the line through the points (-4,-2) and (2,3)
Click here to see answer by josgarithmetic(39617)

Question 1074434: A jet travels 1102 mi against a jetstream in 2 hours and 1262 mi with the jetstream in the same amount of time. What is the rate of the jet in still air and what is the rate of the jetstream?
Click here to see answer by ikleyn(52781)

Question 1074592: given: f(x)=x+1) and g(x)=-4/x-3.what answer for this, which value of x will g(x) be undefined?
Click here to see answer by Fombitz(32388)

Question 1074016: what is the linear form of 5y-y=4
Click here to see answer by Fombitz(32388)

Question 1074731: find an equation for the line -8x+4y=3 having the same y intercept as -7x + 3y=-8.
Click here to see answer by josgarithmetic(39617)

Question 1074825: what is the standard form of the equation of the line through : (2,-4) slope = -1

Click here to see answer by josmiceli(19441)

Question 1074827: . The cost in dollars to ship a package �Next Day� of one pound using Federal Express can be calculated using the linear equation y = 2.085x + 15.08 where x is the weight (pounds) of the package. What is the cost of shipping if the weight is 6.5 pounds?
Click here to see answer by Boreal(15235)

Question 1074829: Consider the linear relationship: y=5x-8 what is the value of the slope or gradient?
(2)what is the value of y when x=0?
(3)what is the significance of your value from part b?
(4)what is the value of y when x=24?
(5)what is the value of x when y=17?

Click here to see answer by Alan3354(69443)

Question 1074831: point slope form equation can be produced with the points (-5, -2)(4,-3)
Click here to see answer by josgarithmetic(39617)

Question 1074867: Passes through (2,3) and has a slope of -1/2. What is the point-slope form?
Click here to see answer by josgarithmetic(39617)

Question 1074869: A company produces two gift packages of fruit.Package A contains 20peaches,15apples and 10pears.Package B contains 10peaches,30apples and 12 pears.The company has 40000peaches,60000apples and 27000pears available for packaging.The profit on package A is $2.00 and the profit on package B is $2.50.Assuming that all fruit packages can be sold,what number of packages of types A and B should be prepared to maximize the profit?How much fruit will be left over? (SOLVE WITH THE AID OF A GRAPH )
Click here to see answer by Theo(13342)

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