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Tutors Answer Your Questions about Systems-of-equations (FREE)
Question 177792: Can you help me solve this problem {{n/n-3 + n = 7n-18/n-3}}?
I know that you will need to use n-3 as a common denominator, but once i have done that i come out with {{n+n^2-3n=7n-18}}. On my teachers answer sheet it says the answer is suppose to be 6 but how is that possible?
Click here to see answer by MathTherapy(337)   |
Question 180281This question is from textbook Holt Algebra 1
: It takes Akira 10 minutes to make a black and white drawing and 25 minutes for a color drawing. On Saturday he made a total of 9 drawings in 2 hours. Write and solve a system og equations to determine how many drawings of each type akira made.
So do you need in the equation that it takes 2.5 times more to make a color drawing? What I don't get is how to make the variables. And to slove this equation do you solve it by using elmination or by substitution?This question is from textbook Holt Algebra 1
Click here to see answer by Mathtut(3670) |
Question 180319: Variation Problem
The time required to process a shipment of goods at Alco varies directly with the number of items in the shipment and inversely with the number of workers assigned. If 15,000 items can be processed by 8 workers in 10 hours, then how long would it take 12 workers to process 20,000 items?
Click here to see answer by stanbon(26367) |
Question 180503: Hello I need help on showing my work for a word problem.
Here is an example
The measures of complimentary angles have a sum of 90 degrees. Angle A and B are complimentary, and their measures have a difference of 20 degrees. What are the measures of the angles.
I know the answers (35, and 55) but don't know how to set up the equations according to the question.
So please help.
Click here to see answer by stanbon(26367) |
Question 181364: Solve Variation Problem
Sam's found that the demand for coke products
varies inversely as the price of the product. When the price
of a coke product is $2.75, the weekly demand is 1250.
Find the weekly demand if the price is raised to $4.00.
Click here to see answer by Mathtut(3670) |
Question 181451: Lorena bought 10 packs of styrofoam cups for the graduation dance. a pack of fifty 12-oz cups costs $1.80 and apack of fifty 16-oz cups costs $2.40. Lorena paid a total of $21.60 excluding tax. How many packs of each size cup did she buy?
Click here to see answer by josmiceli(3021) |
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