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

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Question 451456: Find the x and y intercepts and one other point of the line 2x-y= -7
Click here to see answer by robertb(5830)

Question 451522: como determino los valores de k para que el sistema de ecuaciones lineal tenga numero infinito
kx+y=4
2x-3y=-12

Click here to see answer by robertb(5830)

Question 451578: Find the slope of the line.
(5,2),(-4,-2)
Type an integer or a simplified
Click here to see answer by nerdybill(7384)

Question 451696: I need help learning how to start and finish these three problems. My linear programming is kind of sketchy so if you can explain it better than my teacher it would be greatly appreciated.
First problem asks for me to" Minimize the objective function 1/2x+3/4y subject to the constraints
2x+2y greater than equal to 8
3x+5y greater than equal to 16
X greater than equal equal to 0
y greater than equal to 0
Second problem goes as follows" n electronics company has factories in Cleveland and Toledo that manufacture three head and four head VCR's. Each day the Cleveland factory produces 500 three head VCRs and 300 four head VCRs at a cost of $18000. Each day the Toledo factory produces 300 of each type of VCR at a cost of $15000. An order is received for 25,000 three head VCRs and 21,000 four head VCRs. For how many days should each factory operate to fill the order at the least cost.
"our teacher gave us the following answers Cleveland should operate for 20 days and Toledo should operate for 50 days. I just need to learn how to come up with those answers.
My last questions goes as follows " A contractor builds two types of homes. The first type requires one lot, $12,000 capital, and 150 labor-days to build and is sold for a profit of $2400. The second type of home requires one lot, $32,000 capital, and 200 labor days to build and is sold for profit of $3400. The contractor owns 150 lots and has available for the job $2,880,000 capital and 24,000 labor days. How many homes of each type should she build to realize the greatest profit? "Again he gave us a answer of 80 for type 1 and 60 for type 2. Any help would be appreciated thanks in advance.
Click here to see answer by solver91311(24713)

Question 451720: How can I determine if two lines are perendicular?
Click here to see answer by ewatrrr(24785)

Question 451720: How can I determine if two lines are perendicular?
Click here to see answer by richard1234(7193)

Question 451749: Find three consecutive integers such that five times the first integer plus twice the second is equal to six times the third.

Click here to see answer by ewatrrr(24785)

Question 450244: I am wondering how do I factor
81x^2-72x+16
Click here to see answer by ewatrrr(24785)

Question 451910: Please help me find the slope of
9 -1/2= 6x with y being the intercept.
Click here to see answer by stanbon(75887)

Question 451943: The units of a certain number is one greater than twice the tens digit. If the digits are reversed, the new number is 36 more than the original number. Find the original number
Click here to see answer by jorel1380(3719)

Question 452065: Write each equation in slop-intercept form. Then identify the slope and the y-intercept for each line.
2x - y = 12
Find an equation of the line that passes through the given point and has the given slope. Express your answer in slope-intercept form.
(8,0),m= -3
Click here to see answer by AHBK(13)

Question 452108: Find the slop and the y-intercept.
f(x)=-2-10
The slop is _____?
The y-intercept is (0,__)
Click here to see answer by Alan3354(69443)

Question 452130: What is the slope and y-intercept of 9 - 1/4y = 7x
Click here to see answer by Gogonati(855)

Question 452144: Find the slope and the y-intercept of the line.
7x = 5y+40
I'm confused because the other examples don't have the equals sign in this place. So, I'm not sure how to break up the equation.
Click here to see answer by ankor@dixie-net.com(22740)

Question 452147: how do you solve for the problem- 11x+2=20
Click here to see answer by MathLover1(20849)

Question 452174: if the slope of a line is 1/2 and the y-intercept is -2, what is the linear equation in the slope-intercept form?
Click here to see answer by solver91311(24713)

Question 452233: You pay 50 dollars for a meal which includes tip. You gave a 18% tip. How much was the meal before tip?
Click here to see answer by stanbon(75887)

Question 452133: What is the equation for the line containing given point and parallel to the given line: (5,-4); 4x-3y=8
Please simplify the answer and type in the form y=mx+b using integers or fractions.
Click here to see answer by ankor@dixie-net.com(22740)

Question 452251: I'm 39, back in college and taking Algebra. My least favorite subject. I'm at a 3.96 GPA and I can't figure out this stuff!
I can't figure out how exactly to graph out a equation. I have to calculate the slope, x-intercept and y-intercept and label them.
y=x+3
Click here to see answer by josmiceli(19441)

Question 452254: I need help solving
x + 2 = 6 I may know the answers on some of these problems but I would like to know how to solve them myself.
Click here to see answer by edjones(8007)

Question 452274: show that 8n cannot end with digit 0 for any natural number n.
Click here to see answer by rwm(914)

Question 452264: a year hence a father will be 5 times as old as hi son.Two years ago,the father was three times as old as his son will be 4 years hence.Find their present ages.

Click here to see answer by rwm(914)

Question 452491: Find the slop, if it exists, of the line containing the pair of points.
(5,2) and (10,-2)
A. The slop m= _____. (simplify your answer. type an integaer or a fraction.)
B. The slope is undefined.
Click here to see answer by Love math(28)

Question 452801: (2,-3);m=3
Click here to see answer by rfer(16322)

Question 453025: Find the slope and y intercept of: 2x-3y=0 second question is find slope and y intercept for x=-2
Click here to see answer by stanbon(75887)

Question 453112: Evaluate y(x-5) for x=6 and y=2
y(x-5)=
Click here to see answer by solver91311(24713)

Question 453122: Solve the equation.
1/5x = 4/25
The solution set is ___ Simplify the answer.
Click here to see answer by stanbon(75887)

Question 453123: Solve for m using the addition principle
m-5/4 = 9/8
The solution is m= __
Simplify answer. Type a fraction
Click here to see answer by stanbon(75887)

Question 453176: could you show me how to solve this problem step by step. I have another one close to this one for my homework, and I want to learn how to do these.
Wildcat Oil Company has two refineries, one located in Houston and the other in Tulsa, which produce a total of 1,600,000 gallons of petroleum per year. The Houston refinery ships 60% of its petroleum to the chicago gas company, while the Tulsa refinery ships 30% of it petroleum to the same chicago gas company. Assume that over the year, the Chicago gas company received 690,000 gallons of petroleum. How many gallons of petroleum were produced at each of Wildcat's refineries?
Click here to see answer by pedjajov(51)

Question 453131: I am in pre-algebra class, we are studing Location of poins, (I got this) order of pair solution ( I don't understand the steps) Please solve the problem and explain the steps:
(4,3);y=2x-5
Click here to see answer by ankor@dixie-net.com(22740)

Question 453250: find the slope of 4x+y=8.

Click here to see answer by rfer(16322)

Question 453252: write an equation in slope intercept form that describes the line with a slope of 4 and the y-intercept of 1.
Click here to see answer by rfer(16322)

Question 453248: how would you write the equation 4y-3=5x in standard form?

Click here to see answer by rfer(16322)

Question 453169: Could you solve this problem for me I worked it out somewhat just want to know final answer and steps needed to get it.
Up to this points I came up with:
A= 3x+3y+2z less then or equal to 182
B= 7x+4y+z less then or equal to 122
profit equals 3192x+3648y
What are the steps after this problem to finish it and how would i grab it?
A manufacturer has the capacity of producing two different highly technological military devices(device A and B). There are three phases to the construction of these two devices, the first is the construction of the components for the devices, the second is the assembly of the units, and the the third is the finishinig and testing of the devices. for each unit of device A it takes 3 hours to create the components, 3 hours to assemble the device, and 2 hours for finishing for a profit of $3,192. For each unit of device B it takes7 hours to create the components, 4 hours to assemble the device, and 1 hour for finishing for a profit of $3648. Each day there are 182 hours available for the construction of the components, 122 hours available for the assembly of the devices, and 68 hours available for the finishing of the devices. Find the number of devices of A and B that they should create each day to maximize profit.
Click here to see answer by solver91311(24713)

Question 453254: Solve using the substitution method. If the system has no solution or an infinite number of solutions, state this.
-x + 6y = 54
3x + y = 9
Solve using the elimination method. If the system has no solution or an infinite number of solutions, state this.
-2x - 8y = 22
-6x - y = 20

Click here to see answer by mananth(16946)

Question 453249: find the x- and the y- intercept of 3x-y=6.

Click here to see answer by robertb(5830)

Question 453353: what is the slope-intercept of 2x-7y=-24 passing through (9,11)
Click here to see answer by mananth(16946)

Question 453390: find the slope of the line between (1,4)and(3,1)
couldn't find a section on slopes so i thought this would be the best place.
Thanks my man!
Click here to see answer by rwm(914)

Question 453497: I need help finding out what the graph of interval [-4,10] looks like. Can someone show me? Thank you.
Click here to see answer by stanbon(75887)

Question 453573: write an equation in slope-intercept form with a slope of 3/7 and a y-intercept of 4
Click here to see answer by edjones(8007)

Question 453613: slope intercept form- what is the equation the line has a slope of 2 and passing through the point (6,24)?
Click here to see answer by josmiceli(19441)

Question 453657: This question has a graph that goes with it. The readings are (3,0) and (0,-5). The question is about the equation for this problem. Laura routinely bikes to the northern tip or the island and back. Because of the steady wind, she uses one gear going north and another for her return. Laura's bike has 21 gears and the sum of the two gears used on her ride is always 24. Write an equation that represents the different pairings of gears that Laura uses.

Click here to see answer by Alan3354(69443)

Question 453646: 3x-y=4
2x+2y=24
Solve the systems by eliminating the y variable.
Click here to see answer by Alan3354(69443)

Question 454106: cant remember the formula to find this help me out. Graph the line going through the point (1,-5), with 0 slope. thanks
Click here to see answer by richard1234(7193)

Question 454106: cant remember the formula to find this help me out. Graph the line going through the point (1,-5), with 0 slope. thanks
Click here to see answer by richwmiller(17219)

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