Tutors Answer Your Questions about Linear-systems (FREE)
Question 269393: Biking into the wind on a flat path, a bicyclist takes 5 hours to travel 30 miles. The return bike takes 3 hours. The wind speed remains constant during the trip.
a. Find the bicyclist's average speed for each leg of the trip.
b. Write a system of linear equations that represent the situation.
c. What is the bicyclist's average speed in still air? What is the speed of the wind?
Click here to see answer by josmiceli(19441)   |
Question 269393: Biking into the wind on a flat path, a bicyclist takes 5 hours to travel 30 miles. The return bike takes 3 hours. The wind speed remains constant during the trip.
a. Find the bicyclist's average speed for each leg of the trip.
b. Write a system of linear equations that represent the situation.
c. What is the bicyclist's average speed in still air? What is the speed of the wind?
Click here to see answer by Alan3354(69443)  |
Question 269703: I thought I new what I was doing, maybe I'm just tired. I created a system of 2 equations to find length and width and tried to substitute and solve. Please go over the steps and equations used.
A rectangular lot whose perimeter is 220 feet is fenced along three sides. An expensive fencing along the lot's length costs $20 per foot, and an inexpensive fencing along the two side widths costs only $8 per foot. The total cost of the fencing along the three sides comes to $2040. What are the lot's dimensions?
-Thank you
Click here to see answer by mananth(16946)  |
Question 270963: word problem: there was two kids that were selling juice boxes and sandwiches at a local baseball game. They earned $730.50 that day. They sold a total of 540 items. How many juice boxes were sold and how many sandwhiches were sold.
Click here to see answer by solver91311(24713)  |
Question 271058: I need help with solving linear systems. I need to use the linear combinations to solve the system of linear equations. I have tried several and they are not coming out right.
3a+9b=8b-a
5a-10b=4a-9b+5
Please help me!
Click here to see answer by oberobic(2304) |
Question 271088: OK, so I know the following is incorrect, so could you help me to figure out what I am doing wrong. I am trying to solve the linear equations by using linear combinations.
9X-3Z=20
3X+6Z=2
My answers were X=2 and Z= -.66 or -2/3
I would appreciate your help!
Click here to see answer by LarissaRichardson(34)  |
Question 271088: OK, so I know the following is incorrect, so could you help me to figure out what I am doing wrong. I am trying to solve the linear equations by using linear combinations.
9X-3Z=20
3X+6Z=2
My answers were X=2 and Z= -.66 or -2/3
I would appreciate your help!
Click here to see answer by unlockmath(1688)  |
Question 271152: If the larger of two numbers is divided by 6 and is subtracted from three times the smaller number, the result is 44. If the smaller number is increased by 4, the result is half the largest number. Find the numbers. This is so comples I do not know how to set it up. I know 3X-n/6=44 and the part +4 = 1/2n
Click here to see answer by Greenfinch(383)  |
Question 271152: If the larger of two numbers is divided by 6 and is subtracted from three times the smaller number, the result is 44. If the smaller number is increased by 4, the result is half the largest number. Find the numbers. This is so comples I do not know how to set it up. I know 3X-n/6=44 and the part +4 = 1/2n
Click here to see answer by Edwin McCravy(20056)  |
Question 271186: 1 number is 4 less than 3 times another. If their sum is increased by 5, the result is 25. Find the numbers.
The numbers are 6 & 14 - how did they get 6, I can figure out 14 but missing an essential part.
Thank you.
Click here to see answer by craigt(10) |
Question 271186: 1 number is 4 less than 3 times another. If their sum is increased by 5, the result is 25. Find the numbers.
The numbers are 6 & 14 - how did they get 6, I can figure out 14 but missing an essential part.
Thank you.
Click here to see answer by meow123(2) |
Question 271155: A store owner has two different blends of coffee. Brand A sells for $10.50/lb and Brand B sells for $5.75/lb. The owner wants to create a 25 lb mixture of Brand A and B to sell for $8.22 a pound. How much of each blend should he use?
Click here to see answer by josmiceli(19441) |
Question 271575: A steamboat went 8 miles upstream in 1 hour. The return trip took only 30 minutes. Assume that the speed of the current and the direction were constant during both parts of the trip. Find the speed of the boat in still water and the speed of the current.
Please help me figure out what 2 equations I would use and then I believe I can get the answer.
Thanks in advance for your help!
Click here to see answer by stanbon(75887) |
Question 271804: You plant a 14 inch hemlock tree in your back yard that grows at a rate of 4 inches per year and an 8 inch blue spuce tree that grows at a rate of 6 inches per year. In how many years after you plant the trees will the two trees be the same height? And how tall will they be?
I have tried the following:
4x + 6y = 365
x + y = 2
Click here to see answer by scott8148(6628)  |
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