Tutors Answer Your Questions about Linear-systems (FREE)
Question 1047306: Problem Page
In the lab, Heather has two solutions that contain alcohol and is mixing them with each other. She uses
500
milliliters less of Solution A than Solution B. Solution A is
17%
alcohol and Solution B is
11%
alcohol. How many milliliters of Solution A does she use, if the resulting mixture has
167
milliliters of pure alcohol?
Click here to see answer by ankor@dixie-net.com(22740)   |
Question 1047306: Problem Page
In the lab, Heather has two solutions that contain alcohol and is mixing them with each other. She uses
500
milliliters less of Solution A than Solution B. Solution A is
17%
alcohol and Solution B is
11%
alcohol. How many milliliters of Solution A does she use, if the resulting mixture has
167
milliliters of pure alcohol?
Click here to see answer by stanbon(75887) |
Question 1047317: Charlie invested his savings in two investment funds. The amount he invested in Fund A was twice as much as the amount he invested in Fund B. Fund A returned a
7%
profit and Fund B returned a
5%
profit. How much did he invest in Fund B, if the total profit from the two funds together was
$2090
?
Click here to see answer by advanced_Learner(501)  |
Question 1047789: Two factory plants are making TV panels. Yesterday, Plant A produced
4000
panels. Two percent of the panels from Plant A and
5%
of the panels from Plant B were defective. How many panels did Plant B produce, if the overall percentage of defective panels from the two plants was
4%
?
Click here to see answer by advanced_Learner(501) |
Question 1048206: Two planes left the same airport at the same time traveling in opposite directions. The first plane traveled at an average rate of 30 mph slower than the second plane. After 3 hours, the planes were 3150 miles apart.
Enter an equation that can be used to determine when the planes are 3150 miles apart, where x represents the average rate of the second plane.
Enter the average rate of change of the slower plane.
Equation:
Average rate of change:
mph
Click here to see answer by Boreal(15235)  |
Question 1048224: a company manufactures and sells bar stools. manufacturing costs consist of a fixed cost of R25 000 per month and a variable cost of R350 per unit. each unit is sold at R600.00.
determine the linear profit equation
Click here to see answer by Boreal(15235) |
Question 1048715: An employment agency specalizing in temporary construction help pays heavy equipment operators $123 per day and general laborers $87 per day. If thirty two people were hired and the payroll was $3900, how many heavy equipment operators were employed? How many laborers?
Click here to see answer by advanced_Learner(501) |
Question 1048787: 1. In an opera theater, sections of seating consisting of three rows are being laid out. It is planned so each row will be two more seats than the one before it and 90 people must be seated in each section. How many people wit be in the third row?
2. In the same opera theater personal balcony sections with three rows of seating are being mapped as well. In these sections there must be an odd number of seats in each row and each row have two more seats than the one before it. The last stipulation is that the front row must have one quarter the total seats in the back two rows combined. How many seats will be in each row?
Click here to see answer by josmiceli(19441)  |
Question 1048786: 1. Find three consecutive odd integers such that the sum of the smaller two is three times the largest increased by seven..
2. Find three every other even integers such that the sum of all three is equal to three times the largest decreased by the other two numbers
Click here to see answer by josgarithmetic(39617) |
Question 1048786: 1. Find three consecutive odd integers such that the sum of the smaller two is three times the largest increased by seven..
2. Find three every other even integers such that the sum of all three is equal to three times the largest decreased by the other two numbers
Click here to see answer by MathTherapy(10552)  |
Question 1049300: I have been attempting this problem and I have no clue as to where to go. I only have on problem left and I was not able to solve it for this section and was wondering if anyone could please provide assistance on how I should go about solving this.
1.) Determine the rate of change for each equation.
3/2x - 5/4y = 15
Here is what I have attempted to do with the problem: I have subtracted the 3/2x to the other side and ended up with -5/4y = -3/2x +15 which is what I am currently stuck on. I feel like I went about this the correct way, but I could be wrong.
Click here to see answer by MathLover1(20850)  |
Question 1049677: A plane traveled 514.8 miles each way to Sydney and back. The trip there was with the wind. It took 5.5 hours. The trip back was into the wind. The trip back took 11 hours. What is the speed of the plane in still air?
What is the speed of the wind?
I got two equations out of this: 5.5x-5.5y=514.8, and 11x+11y=514.8. I solved the system to get 70.2 mph, and -23.4. Since speed in this sense can't be negative, does anybody know what I did wrong here?
Click here to see answer by josgarithmetic(39617) |
Question 1049677: A plane traveled 514.8 miles each way to Sydney and back. The trip there was with the wind. It took 5.5 hours. The trip back was into the wind. The trip back took 11 hours. What is the speed of the plane in still air?
What is the speed of the wind?
I got two equations out of this: 5.5x-5.5y=514.8, and 11x+11y=514.8. I solved the system to get 70.2 mph, and -23.4. Since speed in this sense can't be negative, does anybody know what I did wrong here?
Click here to see answer by ikleyn(52786)  |
Question 1049823: Hello!!
So i tried this equation many times but it did not work out. The Question was:
Tyler rows 10km downstream in 2 hours. On the return trip, it takes him 4 hours to travel 8 km. Determine his average rowing speed and the speed of the current.
This is what i tried:
Let x rep. his average rowing speed
let y rep. his speed of current
1 equation: 10=(x=y)2
2nd equation: 8+(x=y)4
but i got it wrong, so I was hoping you guys could help me out. Thank you very much!
Click here to see answer by stanbon(75887) |
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