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Tutors Answer Your Questions about Systems-of-equations (FREE)
Question 69950: I think that this question goes under this section:
Which of the following statements is true for the graphs of equations 1 and 2??
1. 2x+y=15 2. 3y=-6x+30
A- the graphs of 1 and 2 are parallel.
B- the graphs of 1 and 2 are perpendicular.
C- the graphs of 1 and 2 are the same line.
D- the graphs of 1 and 2 are neither parallel nor perpendicular.
E- none of the above.
Click here to see answer by checkley75(3666)   |
Question 71443: 4x + y = 16, 2x + 3y = 24
I have tried mul. the 1st equation by -3. Then adding the 2 together. I have tried mul. 2nd equation by -2, then adding the 2 together. I have tried y = 16 - 4x, then tried to substitute y into the 2nd equation. I can't seem to figure it out.
Click here to see answer by Earlsdon(4900) |
Question 72606: Please help me! I don't understand this at all!! I have been out of school sick for the past 2 weeks and i don't understand all this homework that my teacher sent home with me.
The questions ask to write an equation, in slope-intercept form..
my question is how to put it into an equation.
if the question is:
slope of -2/5 and y-intercept of 3
PLEASE HELP ME FIND THIS ANSWER!! If i can be able to understand this question then it will help me do all of my homework. PLEASE, PLEASE help me.
Thanks for all your help,
Lauren
Click here to see answer by bucky(1732) |
Question 73140This question is from textbook
: find the maximum and minimum values of
T= 6x + 10y subject to
x+y < or = to 10
5x + 10y > or = 50
x > or = 2
y > or = 0
Can you possibly help me with this?
Thank YouThis question is from textbook
Click here to see answer by stanbon(26280) |
Question 73230: I would really appreciate any help I could get on this question. Word problems are sooo very challenging sometimes and I just cannot figure out how to do this one :<(
An airplane took 2.5 hours to fly 625 miles with the wind. It took 4 hours and 10 minutes to make the return trip against the same wind. Find the wind speed and the speed of the plane in still air.
(All I can see is that if you convert both times traveled into minutes then there is a 100 minute difference and divided by 625 miles would be 6.25 miles per minute but which part of the question would this answer and is it even relevent to either question??)
Thanks so much in advance for any help that can be provided :>)
Click here to see answer by ankor@dixie-net.com(6693)  |
Question 73692: Hi - could someone please provide some help on this one? Thanks so very much in advance!
One train leaves a station heading due west. Two hours later a second train leaves the same station heading due east. The second train is traveling 15mi/h faster than the first. Six hours after the second train leaves, the two trains are 580 miles apart. Find the rate at which each train is traveling.
(I think I am getting confused by the fact that the second train leaves 2 hours after the first rather than at the same time)
Thanks again for any help on this one :>)
Click here to see answer by ankor@dixie-net.com(6693) |
Question 73763: Jeff starts driving at 75 miles per hour from the same point that Lauren starts driving at 70 miles per hour. They drive in opposite directions, Lauren has a half-hour head start. How long will they be able to talk on their cell phones that have a 370-mile range?
Click here to see answer by bucky(1732) |
Question 73762: Jeff starts driving at 75 miles per hour from the same point that Lauren starts driving at 70 miles per hour. They drive in opposite directions, Lauren has a half-hour head start. How long will they be able to talk on their cell phones that have a 370-mile range?
Click here to see answer by bucky(1732) |
Question 75645: 5) The first side of a triangle is 5 inches less than the second side, and the third side is twice as long as the first sides. If the perimeter of the triangle is 33 iches, find the lengths of the sides of the triangle.
6) The shortest side of a triangle is 8 feet less than the medium side, and the longest side is 4 feetlonger than 3 times the shortest side. If the perimeter is 27 feet, find the length of the shortest side.
Click here to see answer by checkley75(3666) |
Question 76149: The redland school store sells long-sleeved t-shirts and short -sleeve t-shirts.Last year, they sold a total of 325 t-shirts that brought in a total of $4410. If the short sleeved t-shirts were sold for $12 each and the long sleeved t-shirts cost $15,how many of each type of shirt were sold throughout last year?
Click here to see answer by josmiceli(3009) |
Question 76360: could you please help me with this problem. i already started it, but i don't know how to finish it.
solve for "y"
6ax - 5by/2y+6w-7z = x
first i multiply both side with
so i got x (2y + 6w - 7z) = 6ax - 5by and i got stuck. could you please help me and please try to reply as soon as possible!!
thanks a lot
Click here to see answer by scott8148(3382)  |
Question 77938: I need to understand how to solve this equation:
College Students spend $183 more each year on textbooks than on computer equipment. They spend a total of $819 on textbooks and computer equipment each year. How much is spent each year on textbooks and how much is spend on computer equipment.
Click here to see answer by checkley75(3666) |
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