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

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Question 4731: how do you work out square route of a number
Click here to see answer by rapaljer(4667)

Question 4798: hi I have a question regarding the folowing equations...I don't need the answers, but each time I try to solve using elimination, I am not getting an answer...I just need to know if there *is* an answer of if he wrote it down wrong!

11.2x=.4y+21.16
6x-28.87=7.2y

Thanks!
Click here to see answer by longjonsilver(2297)

Question 4778: x-2y+4<>o
<> I mean is less than equal to, I can't find the button. I do not understand how to do these so if anyone could help me step by step I would greatly appreciate it. Thank you
Click here to see answer by longjonsilver(2297)

Question 4810: how do I find the following solution:
(4y³+3y²+2)/(y+1)
Click here to see answer by longjonsilver(2297)

Question 4822: what is the solution of x+y=4 and 2x-y=-5
Click here to see answer by longjonsilver(2297)

Question 4822: what is the solution of x+y=4 and 2x-y=-5
Click here to see answer by Abbey(339)

Question 4842: solve by using the addition method
x-y=100
0.20x+0.06y=150
Click here to see answer by Abbey(339)

Question 4841: Solve the system by the addition method
x/3-y/2=-5/6
x/5-y/3=-3/5
Click here to see answer by rapaljer(4667)

Question 4718: "solve for x"
1) 4x^2+12x+9=0
2) 7(x+2)^2=12
3) 2x^2-8x+5=0
4) (2x-5)/(x-3)=(4x+1)/(2x)
p.s. thanks
Click here to see answer by Abbey(339)

Question 4850: Six apples and three oranges cost $3.36. Two apples and five oranges cost $3.04. Find the cost of an apple and the cost of an orange.
Click here to see answer by rapaljer(4667)

Question 4850: Six apples and three oranges cost $3.36. Two apples and five oranges cost $3.04. Find the cost of an apple and the cost of an orange.
Click here to see answer by Abbey(339)

Question 4848: the perimeter of a rectangle is 160 ft. One fourth the length is the same as twice the width. Find the dimensions of the rectangle.
Click here to see answer by Abbey(339)

Question 4853: In lewis Carrol's "Through the Looking Glass," Tweedledum says to Tweedledee, "The sum of your weight and twice mine is 361 pounds." Then Tweedledee says to Tweedledum, "Contrariwise, the sum of your weight and twice mine is 362 pounds." Find the weight of Tweedledum and Tweedledee.
Click here to see answer by Earlsdon(6287)

Question 4854: Fenton Rent-A-Truck charges $32.85 plus $.49 per mile for a certain truck. Handy Truck Rents charges $31.95 plus $.48 for the same truck. For what mileage is the cost the same?
Click here to see answer by rapaljer(4667)

Question 4859: could you please help me solve for x in this equation:
2x+y=5
x-y=1
could you by any chance please explain in the easiest way possible i tried the solver but i wasnt understanding the solution very well so if you could help me out step by step that would be great thank you.
Click here to see answer by Abbey(339)

Question 4851: The booster club voted on where they would go for their annual trip. A majority of the club voted to go to a baseball game. They bought 29 tickets. Some of the tickets cost $21 each and some cost $27 each. The total cost of all the tickets was $675. How many tickets of each price did they buy?
Click here to see answer by Abbey(339)

Question 4864: Can anyone please help me here
Lets assume that the combines population of Anchorage and Tampa was 25,000 in 1995. By 1960 the population of Anchorage had increased by 10% while Tampa had increased by 9%. If the total population increased by 2380 poeple, then what was the population of each city in 1995.
Click here to see answer by jainenderkapoor(61)

Question 4887: Find the equation of each line. Write the answer in standard form using only integers.
The problem is:
The line through the points (-1,-3) and (2, -1).
Please help!
Click here to see answer by longjonsilver(2297)

Question 4870: Please help with solving the systems of equations by substitution and elimination. Once I started working with solving this problem in the substituation method, I ran into fractions. Is there a way to eliminate fractions early on?
4x + 7y =18
5x - 3y = 2
I solved for x by getting x = -7y/4 + 18/4
Thanks!!
Click here to see answer by longjonsilver(2297)

Question 4847: Tyrone is twice as old as his daughter. In six years Tyrone's age will be three times what his daughters age was six years ago. How old are they at present?
Click here to see answer by longjonsilver(2297)

Question 4846: four oranges and five apples cost $3.56 three oranges and four apples cost $2.76. find the cost of an orange and the cost of an apple.
Click here to see answer by Abbey(339)

Question 4839: Let's assume that the combined population of Anchorage and Tampa was 25,000 in 1995. By 1960 the population of Anchorage had increased by 10% while Tampa had increased by 9%. If the total population increased by 2380 people, then what was the population of each city in 1955.
Click here to see answer by Abbey(339)

Question 4914: -5y + 6x - 11 = 0
Click here to see answer by Abbey(339)

Question 4913: 6x + y = 12
Click here to see answer by Abbey(339)

Question 4912: A collection of nickels, dimes and quarters has a value of $7.50. If there are 3 fewer dimes than nickels and twice as many quarters as nickels, how many dimes are there?
Click here to see answer by Abbey(339)

Question 4849: Safety Rent-A-truck rents a truck at a daily rate of $41.95 plus $.29 per mile. City Rentals rents the same size truck for $38.95 plus $.31 per mile. For what mileage is the cost the same?
Click here to see answer by Abbey(339)

Question 4852: Lorena bought 10 packs of styrofoam cups for the graduation dance. A pack of fifty 12-oz cups costs $1.80 and a pack of fifty 16-oz cups costs $2.40. Lorena paid a total of $21.60 including tax. How many packs of each size cup did she buy?
Click here to see answer by lotanez(23)

Question 4939: determine f-1 for f(x) = cubed root of(x+5)
(in f -1) is not f minus 1 or the negative 1 power of f)
Click here to see answer by rapaljer(4667)

Question 4938: Determine whether the given function is invertible. If it is invertible, then find its inverse. {(13,0),(10,9),(9,10)}
Click here to see answer by rapaljer(4667)

Question 4937: Determine whether the given function is invertible. If it is invertible, then find its inverse. {(13,0),(10,9),(9,10)}
Click here to see answer by rapaljer(4667)

Question 4942: Let f(x) = –5x – 3 and g(x) = x2 + 10x. Find (f o g)(x)
Click here to see answer by rapaljer(4667)

Question 4941: determine f-1 for f(x) = cubed root of(x+5)
(in f -1) is not f minus 1 or the negative 1 power of f)
Click here to see answer by rapaljer(4667)

Question 4943: Find the distance between (6, –1) and (5, 8).
Click here to see answer by rapaljer(4667)

Question 4940: Let f(x) = -3x-3 and g(x)=x^2+2x. Find (f-g)(2)
Click here to see answer by Abbey(339)

Question 5016: Graph: y = 2x + 2
Click here to see answer by longjonsilver(2297)

Question 5023: Here is the question?
With a GM Mastercard, 5% of the amount charged is credited toward a rebate on the purchase of a new car. Express the rebate R as a function of the amount charged A.
I came up with r = a x 0.05
Is this correct? I am so lost when it comes to word problems and algebra.
Thanks for you help.
Click here to see answer by Earlsdon(6287)

Question 5022: I'm trying to convert GPA into points (as part of an admissions portfolio). If an applicant has a 4.0 GPA, this would be worth 20 points. A GPA of 3.0 would be worth 12 points; and a GPA of 2.0 would be worth 4 points. Please help determine the slope of the line and the constant (so we can assign points to students with a range of GPA from 0 to 4.0)
points = m(GPA) + b
Click here to see answer by Earlsdon(6287)

Question 5037: Find the intercepts for the graph of the equation.
5x+y=5
Click here to see answer by ichudov(499)

Question 5026: For my question y = 2x + 2, is that the same as y < 2x+ 2? I also need to graph it.
I tried to solve is like this:
2x + 2 = 0
subtract 2 from each side
2x = -2
2* -1 = -2
therefore, x = -1.
to graph it I would start at x = -1 and / to y = 2 ?

Click here to see answer by longjonsilver(2297)

Question 5019: Graph y < 2x + 2
Click here to see answer by longjonsilver(2297)

Question 5043: Solve this system of equations with the substitution method
Y=3x - 2
Y=-1/2x + 5
Click here to see answer by rapaljer(4667)

Question 4948: Write a formula that expresses the relationship described below. Match your result to the correct answer below.
r varies as t and r = –4 when t = 2.
Click here to see answer by rapaljer(4667)

Question 5050: I can figure out how to do the graphs. I just don't know how to figure out the plotting points. Comlete the following table for the equation 2x + y = 6. 1)x=-2, y=? 2)x=?, y=-3 3)x=1/2, y=? 4)x=?, y=9. I have the answers in my book, I can't figure how they solved the table. Can you please show me how they worked these problems in order to get the answers? Thank-you. BRT
Click here to see answer by lotanez(23)

Question 5077: I have been working on this for 2 days, I just do not get it. Any help would be greatly appreciated.
given f(x)=-x^3+2x^2+2x+5
find
f(-1), f(0), and f(1)

Click here to see answer by longjonsilver(2297)

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