Questions on Algebra: Systems of equations that are not linear answered by real tutors!

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Question 1138659: A cell phone company has the following cost and revenue functions:
C(x) = 8x^2 − 600x + 21,500 and
R(x) = −3x^2 + 480x
What is the quantity range of cell phones they should produce each day so there is a profit? Round to the nearest numbers that generate profit.

Click here to see answer by Boreal(15235)

Question 1138658: Use simultaneous equations to solve:
Two numbers add up to 1. One number is 5 less than than the square of the other number. What are the numbers?
Click here to see answer by Boreal(15235)

Question 1138657: Solve system of nonlinear equations:
y = e^x
y = ln(x) + 5

Click here to see answer by ikleyn(52775)

Question 1139169: A metallurgist made two purchases. The first purchase, which cost $1064, included 48 kilograms of an iron alloy and 20 kilograms of a lead alloy. The second purchase, at the same prices, cost $730 and included 24 kilograms of the iron alloy and 19 kilograms of the lead alloy. Find the cost per kilogram of the iron and lead alloys.
Click here to see answer by josgarithmetic(39616)

Question 1139542: Solve the system of inequalities and indicate all the integers which are in the solution set:
3−2a<13
5a<17
Click here to see answer by josgarithmetic(39616)

Question 1140133: 3(x+6)=5x-2

Click here to see answer by Alan3354(69443)

Question 1140491: a video store rents new release movies for $3 and favorites for $1.75. one day the number of new release movies was twice the number of favorites. If the total income from those rentals was $658.75, how many movies of each kind were rented
Click here to see answer by Boreal(15235)

Question 1140941: At billys preschool, they have bicycles and tricycles, with a total of 57 wheels. The number of bicycles is there less than three times the number of tricycles. How many of each is there?
I tried the making the equation 2b+3t=47 and 3-3t=n. I don't think it was the right answer

Click here to see answer by josmiceli(19441)

Question 1141939: What is the correct classification of the system of equations below?
2x + 6y = 8
y - 2x = 2
A.
parallel
B.
coincident
C.
intersecting
Click here to see answer by ikleyn(52775)

Question 1142567: solve graphically showing steps.
y<=-x^2+4
y>=x^2-2x-3
Click here to see answer by Edwin McCravy(20054)

Question 1142659: x^2-2sqrt2xy+2y^2
Click here to see answer by Alan3354(69443)

Question 1142978: If (3, b) is a solution of the equation 3x - 2y = 17, what is b?

Click here to see answer by ikleyn(52775)

Question 1143518: Hello! I am not very good with a system of equations, here are another one of the problems that I am having trouble with.
Find a value for a so that the system has no solutions
y = (2/3)x - 5
y = ax + 5
Thanks!
Click here to see answer by greenestamps(13198)

Question 1143517: Hello! I am not very good with a system of equations, here is one of the problems that I am having trouble with.
Find a value for a and b so that the system has infinitely many solutions.
y = (2/3)x - 5
y = ax + b
Thanks!
Click here to see answer by ikleyn(52775)

Question 1143572: if the sum of two numbers is 32 and their quotient is three, what are they?
Click here to see answer by math_helper(2461)

Question 1143626: x^3-x=3
Click here to see answer by greenestamps(13198)

Question 1144381: If Y equals 10X plus 2 and 2X plus Y equals 26 what is the value of X minus Y
Click here to see answer by richwmiller(17219)

Question 1144381: If Y equals 10X plus 2 and 2X plus Y equals 26 what is the value of X minus Y
Click here to see answer by ikleyn(52775)

Question 1144380: The line graph and X equals -1 form a system of equations. The system has a solution at X, why what is the value of 5XY
Click here to see answer by richwmiller(17219)

Question 1144717: A cable network offers members a Basic plan for $7.83 per month. For $2.00 more per month, the cable network offers a Standard plan, which includes HD movies. During one week, 310 new subscribers paid a total of $2727.30 for their plans. How many Basic plans and how many Standard plans were purchased?
Click here to see answer by ikleyn(52775)

Question 1145160: Of 24 pounds of salt water, 8% is salt. Of another mixture,4% is salt. How many pounds of the second mixture should be added to the first mixture in order to get a 5% salt? Write an equation to represent total amount of salt water in pounds present. Let x represent total amount of 4% salt water and let y represent the total amount of the end 5%
Click here to see answer by josgarithmetic(39616)

Question 1145220: A chemical company makes two brands of antifreeze. The first brand is 65% pure antifreeze, and the second brand is 90% pure antifreeze. In order to obtain 110 gallons of a mixture that contains 70% pure antifreeze, how many gallons of each brand of antifreeze must be used?
Click here to see answer by ikleyn(52775)

Question 1146094: There are two machines that produce aluminum cans. The newer machine can produce 7200 cans in 180 minutes. It takes the older machine 360 minutes to produce that many cans. If the two machines work together, how long will it take them to produce 7200 cans?
Click here to see answer by VFBundy(438)

Question 1146262: Castel spent $96 on 7 hostas and 13 geraniums. Eugene spent $86 on 7 hostas and 8 geraniums. What is the cost of one hosta and the cost of one geranium?
Click here to see answer by richwmiller(17219)

Question 1146297: The question is if x = -3
what does 19 - (-x) =
Click here to see answer by josgarithmetic(39616)

Question 1146797: Find two numbers whose sum is 101 and difference is 9.

Thank you!
Click here to see answer by ikleyn(52775)

Question 1147326: What is the squre root of 225
Click here to see answer by ikleyn(52775)

Question 1148006: Bikes’R’Us manufactures bikes, which sell for $250. It costs the $180 per bike, plus a startup fee of $3,500. After how many bikes sold will the manufacturer break even?
Click here to see answer by josmiceli(19441)

Question 1148929: Gina ordered 2 sheets of wallet-sized photos and 4 sheets of portrait-sized photos for $30. Rosanne ordered 3 sheets of wallet-sized photos and 3 sheets of portrait-sized photos for $27. Kristina ordered 1 sheet of wallet-sized photos and 5 sheets of portrait-sized photos. Each sheet of wallet-sized photos cost the same. Each sheet of portrait-sized photos cost the same. How much did Kristina pay for her photos?
Click here to see answer by josmiceli(19441)

Question 1149962: Problem Page
A fruit company delivers its fruit in two types of boxes: large and small. A delivery of 8 large boxes and 3 small boxes has a total weight of 163 kilograms. A delivery of 2 large boxes and 5 small boxes has a total weight of 96 kilograms.
How much does each type of box weigh?
Click here to see answer by josgarithmetic(39616)

Question 1152325: It is not a system, I can not find anything, anywhere that is just solving one nonlinear equation.
x/(x+1)>3x
1. Work the problem
2. Set to zero and factor.
3. Find zeros.
4. Find intervals.
5. Test intervals.
6. Write answer in interval notation and graph.
Click here to see answer by MathLover1(20849)

Question 1152719: airplane at 19,200 feet descending at a rate of 40 feet per second. Another airplane takes off and ascends at a rate of 60 feet per second. After how many seconds will the airplanes be at the same height? What is the height?
Click here to see answer by ikleyn(52775)

Question 1152740: if x=2y+3 and 4x-5y=9 what is the value of y?

Click here to see answer by josgarithmetic(39616)

Question 1152796: Shelby has some nickels and quarters worth $2.30. Andrew has twice as many nickels as Shelby, but 3 less quarters that Shelby. Andrew's coins are worth $1.85. How many nickels and quarters does Shelby have? Any help is appreciated!
Click here to see answer by ikleyn(52775)

Question 1152850: 1.5 hours and the material costs
$8. Method II takes
2.0 hours, and the material costs
$5 Next week, they plan to spend
158 hours in labor and
$480
in material for refinishing tables. How many tables should they plan to refinish with each method? (Round to two decimal places if necessary.)
Click here to see answer by MathLover1(20849)

Question 1154218: 1.3s+1.7f=37.9
5.4s+5.6f=147.2
can you send me the answers and the work if possible
Click here to see answer by MathLover1(20849)

Question 1154218: 1.3s+1.7f=37.9
5.4s+5.6f=147.2
can you send me the answers and the work if possible
Click here to see answer by MathTherapy(10551)

Question 1154405: I have two more problems, but of course, I have to do the One problem per submission, so stick with me.
3x+6y=12
3x+y=8
Both are in the same problem.
Thanks so much!
Click here to see answer by MathLover1(20849)

Question 1154404: Hi, I have a problem here, I am horrible with math so please go easy on me. I don't even know if this is in the right category. My paper says
Solving System of Equations by Graphing
y = -2x+6
y=2x+2
They are in the same problem.
Thank you for the help and for taking the time to read this.
Click here to see answer by MathLover1(20849)

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