Tutors Answer Your Questions about Linear-systems (FREE)
Question 188265: can you please help me solve this equation?
The area on the graph, shaded for the inequality 3x+2y<5 can be described as
a.shaded below a solid line
b.shaded below a dashed line
c.shaded above a solid line
d.shaded above a dashed line
Click here to see answer by Alan3354(69443)   |
Question 188387: You are choosing between 2 plans at a discount warehouse. Plan A offers an annual membership fee of $300 and you pay 70% of the manufacturer's recommended list price. Plan B offers an anual membership fee of $40 and you pay 90% of the manufacturer's recommended list price. How many dollars of merchandise would have to purchase in a year to pay the same amount under both plans? What will be the cost for each plan?
Appreciate any help you can give me. Thanks
Click here to see answer by stanbon(75887) |
Question 188386: The average life expectancy for American men born in 1900 was 55 years. Life expectancy has increased by about 0.2 year for each birth year after 1900. If this trend continues for which birth year will the average life expectancy be 91 years?
I think the answer is 2080. I just don't know how to show this in algebraic terms.
Click here to see answer by stanbon(75887) |
Question 188389: A repair bill on a sailboat came to $1603, including $532 for parts and the remainder for labor. If the cost of labor is $63 per hour, how many hours of labor did it take to repair the sailboat?
Appreciate any help you can give me. Thanks
Click here to see answer by stanbon(75887) |
Question 188389: A repair bill on a sailboat came to $1603, including $532 for parts and the remainder for labor. If the cost of labor is $63 per hour, how many hours of labor did it take to repair the sailboat?
Appreciate any help you can give me. Thanks
Click here to see answer by jojo14344(1513) |
Question 188144: The average life expectancy for American men born in 1900 was 55 years. Life expectancy has increased by about 0.2 year for each birth year after 1900. If this trend continues, for which birth year will the average life expentancy be 91 years?
I think the answer is 2080. I just have no idea how to put this in algebraic terms.
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 188521: Laura has $4.50 in dimes and quarters. She has 3 more dimes than quarters. How many quarters does she have.
How do you find two linear equations (y=mx+b), one that shows quantity of the coins. And one that shows the amount the coins are worth. I am suppose to use "d" and "q" to represent the dimes and quarters.
So far I got: q=dx+3 and 4.50=qx+d
Click here to see answer by solver91311(24713)  |
Question 188521: Laura has $4.50 in dimes and quarters. She has 3 more dimes than quarters. How many quarters does she have.
How do you find two linear equations (y=mx+b), one that shows quantity of the coins. And one that shows the amount the coins are worth. I am suppose to use "d" and "q" to represent the dimes and quarters.
So far I got: q=dx+3 and 4.50=qx+d
Click here to see answer by feliz1965(151) |
Question 188573: The percentage of global energy used by China exceeds Russia by 6% and the percentage of global energy used by the United States exceeds Russia by 16.4%. Combined the U.S., China, and Russia consume 40.4% of the world's energy. Determine the percentage of global energy used by each country.
Thanks for any help you can give me on this. I've been rereading and rereading problem and can't think of how to do it.
Click here to see answer by josmiceli(19441)  |
Question 188294: Two people start driving toward each other on the same highway at the same time from towns 420 miles apart. One car travels 15 mph faster then the other. what is the rate of each other if they meet in 4 hrs.
answer: The first car travels at 60 mph; the second car travels at 45 mph.
need a full break down of how my text book got this answer
Click here to see answer by jojo14344(1513) |
Question 189283: Could you please help me solve this system?
10m-3n=5
5m+2n=-8
I thought I could solve it easily by the addition method, but I came up with some crazy fractions and got stuck. Please help.
This is how I started:
2(10m-3n=5)
3(5m+2n=-8)
20m-6n=10
15m+6n=-24
35m=-34
This is where I got stuck. Please help!
This problem did not come from a text book, it came from a worksheet.
Click here to see answer by Alan3354(69443) |
Question 189434: This problem was given in a packet of problems from a teacher preparation program I am currently undertaking. If (-3.5, y) is a solution to the equation 2x-5y=10, what is the value of y? I have the answer in an answer key is -0.6, but do not know how to figure this one out, please help by showing your steps. Thank you, Ruby
Click here to see answer by nerdybill(7384)  |
Question 190012: Solve each system of quations below using multiplication with the addtion method.
5x-2y=4
3x-2y-5
I dont know how to start it. I think u multiply the top 5x-27=4 by 2, something like that. thats what confuses me the most.
Click here to see answer by jojo14344(1513) |
Question 190428: I need some help with solving direct and indirect variations.
The problem I have is how to set them up.
The problem is:
The volume of gas at a constant temperature varies inversely as the pressure. Find the volume of a gas under pressure of 24 pound per cubic centimeter if the gas occupies a volume of 123 cubic centimeters under a pressure of 20 pounds per cubic centimeter.
I know i need to use the formula
Q=k/m but I am not quite sure what goes where.
Thanks in advance for any help.
Click here to see answer by stanbon(75887) |
Question 190428: I need some help with solving direct and indirect variations.
The problem I have is how to set them up.
The problem is:
The volume of gas at a constant temperature varies inversely as the pressure. Find the volume of a gas under pressure of 24 pound per cubic centimeter if the gas occupies a volume of 123 cubic centimeters under a pressure of 20 pounds per cubic centimeter.
I know i need to use the formula
Q=k/m but I am not quite sure what goes where.
Thanks in advance for any help.
Click here to see answer by Earlsdon(6294) |
Question 190439: I am not sure if I fully understand how to solve variations.
Here is a problem that I did could you please tell me if it is right and if it is wrong what I did wrong
M varies inversely as P. When M is 4, P is 10
Find the constant of proportionality for this variation.
M=k/p
4=k/40
k=40
THen it states to find P when M is 12
12=40/p
p=3.333
but that is not the answer in the book so I am sure that I did that part wrong but am unsure of how it needs to be done
Any help would be greatly appreciated
Click here to see answer by solver91311(24713) |
Question 190702: I submitt a request a minute ago and I don't think I remembered to Thank anyone. How rude of me! I'm usualy not like that. So Thank-you to who read it, and Thank-you to who reads this:-) Good Day, I am having a problem writing a slope and y-intercept equation with a slope and y intercept inputs. 6 and y-intercept(0,9). If someone could help me I would be very grateful.
Click here to see answer by jim_thompson5910(35256) |
Question 190711: Can anyone help me? I swear it's the last one:-)My problem is: Use the equations of the lines to determine if they're parallel. y=0.15x+0.79, 0.11x-y=o.85. I would be greatful if someone could show me how this is done, no matter how much I read and study, I still don't get it. Again Than-x and Have a Good Easter.
Click here to see answer by Alan3354(69443) |
Question 190808: Hi again, John (I don't have the symbols)91311(3186)was nice enough to answer a question but I forgot to explain in detail. If I were to graph C(g)=3.03, what is domain and range? I goofed by not saying it was cost per gallon of gasoline. I'm playing beat the clock and I really didn't need to make such a dumb mistake. I guess I'm tired. Thanks for any help.
Click here to see answer by jim_thompson5910(35256) |
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