Tutors Answer Your Questions about Linear-systems (FREE)
Question 430792: Please help me find the solution set(s) to this problem. It uses Addition Method.
So far i have this: (0,7),(0,-7),(-2,???),(-2,???)
The question marks are what i can't figure out, and i am not sure whether the rest is right or not. Please help!! Thank you!!!
Click here to see answer by sudhanshu_kmr(1152)   |
Question 432235: Hi,
I was wondering if you could help me solve this system of equation algebraically.
Question: Solve the following systems of equations algebraically and check.
2/3x + y = 13
-x + 2y + 5
I am having truble understanding what to do since it has a fraction. I keep getting decimals and when I check the answers are not coming out correct.
Thanks for all your help. It is greatly appreciated.
Click here to see answer by mananth(16946)  |
Question 432350: Joe lives 5 miles from the school and Maya lives 2 miles from the school. If joe walks from his house in anopposite direction from the school at a speed of 4 miles per hour, and Maya walks from her house in an opposite direction from the school at a speed of 6 miles per hour, after how long will they be the same distance from the school? What is that distance?
Click here to see answer by shree840(260)  |
Question 432554: Sarah Meeham blends coffee for Tasti-Delight. She needs to prepare 190 pounds of blended coffee beans selling for $4.55 per pound. She plans to do this by blending together a high-quality bean costing $5.50 per pound and a cheaper bean at $3.25 per pound. To the nearest pound, find how much high-quality coffee bean and how much cheaper coffee bean she should blend.
Click here to see answer by rwm(914) |
Question 432643: A grandmother agrees to purchase a cell phone for emergency use only. AT&T now offers such a plan for $9.99 per month and $0.07 for each minute, t, the phone is in use.
A) write a linear function that describes the monthly cost C in terms of the time in minutes the phone is used.
B)If the grandmother used her phone for 20 minutes during the first month, what was her bill?
Click here to see answer by jorel1380(3719)  |
Question 432969: my question is this:
There were 44,000 people at a ball game in Los Angeles. The day's receipts were $369,000. How many people paid $13.00 for reserved seats and how many paid $6.00 for general admission?
in the class, we are working with using systems of equations to combine equations and eliminate one variable to figure out the other variable ie:
x + y = 5
x - y = -9
2x = -4
x = -2
and those types of problems. for this question, i can not figure out what to use as variables for either side of the equation. the other word question we were given gave 6 variables, so we were able to plug in a numerical value to each section. here- theres only 4 numbers.
is this a different type of question entirely, or- am i just missing the point entirely?
thanks in advance!
Click here to see answer by belle3833(46)  |
Question 434421: Im sorry but can you help me with the other question
Angelo thinks that x^2=(x-y)^2 for all values of x and y. which pair of values disproves his theory?
A x=2 and y=0
B x=1 and y=1
C x=0 and y=1
D x=0 and y=0
Click here to see answer by edjones(8007)  |
Question 435221: The line y=2.25x+1.79 represents an estimate of the average cost of gasoline each year. The line 0.11x-y=-0.85 estimates the price of gasoline in January of each year.
Use the equations of the lines to determine if they are parallel, perpendicular or intersecting. Justify your answer.
Please help me I am completely lost.
Click here to see answer by stanbon(75887) |
Question 435232: Could someone please show me how to solve this problem?
Snookers lumber can convert logs into either lumber or plywood. In a given day, the mill turns out three times as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced and sold in order to make a profit of $17160
Click here to see answer by stanbon(75887) |
Question 435606: I need your help with this question. A farmer has 2420 feet of fence to enclose a rectangular area that borders a river. No fence is needed along the river. Find the possibe dimensions to enclose  . I have two equations which are x+x+y=2420 and xy=435600 and I can't figure out where to go from there.
Click here to see answer by edjones(8007) |
Question 435904: I think this is the right category...
The average length of time that 3 lawn service mowers operate on a given day is 930 minutes. None of the mowers operates for less than 900 minutes. What is the greatest possible length of time any of the mowers operates?
I am having difficulty figuring out how to set this one up.
930 = [a + b + c] / 3
?
I am returning to algebra after many years of absence. I am now required to pass a test soon. I have other questions as well.
Thank you
mrerek
Click here to see answer by Alan3354(69443)  |
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