Tutors Answer Your Questions about Linear-systems (FREE)
Question 202705: Please help me solve this word problem:
Gustav invested all of his $3,000 savings: a part in annual rate of 6% and the rest at an annual rate of 9%. His annual income from both investments is equivalent to 8% of his total investment. How much is invested at 9%?
Click here to see answer by rfer(16322)  |
Question 202745: Solve
9/10 (7+2x)+2 ≥ 14
--------------------
63/10 +9/5 x+2 ≥ 14
9/5x+83/10 ≥ 14
subtract 83/10
9/5x + 83/10-83/10 ≥ 14-83/10
9/5x ≥ ?/10 ( I'm a little confuse and could you help me out here please?)
Then multiply 5/9
9/5x * 5/9 ≥ ?/10*5/9 (And here?)
x ≥ ?
Thank you!
Click here to see answer by jim_thompson5910(35256) |
Question 202745: Solve
9/10 (7+2x)+2 ≥ 14
--------------------
63/10 +9/5 x+2 ≥ 14
9/5x+83/10 ≥ 14
subtract 83/10
9/5x + 83/10-83/10 ≥ 14-83/10
9/5x ≥ ?/10 ( I'm a little confuse and could you help me out here please?)
Then multiply 5/9
9/5x * 5/9 ≥ ?/10*5/9 (And here?)
x ≥ ?
Thank you!
Click here to see answer by rfer(16322) |
Question 202824: I have no idea do even start this problem I reallly need help.
The album thriller was released in december of 1983, when the king of pop was worth $37 million. when thriller finally fell from the billboard top 10 in july 1985 micheal's net worth was $193 million.
Using december 1983 as a reference month, determine a liner function that can ve used to estimate Micheals net worth during the thriller albums billboard top 10 period. let your time variable represent the number of months since december.
I was thinking that i would have to do something like subtract 37 from 193 or something but im not confident about it..help?!?!
Click here to see answer by stanbon(75887) |
Question 203093: 1.Use the Substitution method to solve the system of equations.
x + y = 10
y = x + 8
2.Use the Substitution method to solve the system of equations.
3x + y = 5
4x - 7y = -10
3.Use the Substitution method to solve the system of equations.
y - 2x = -5
3y - x = 5
can you please help me solve each step by step so i can under stand
Click here to see answer by jim_thompson5910(35256) |
Question 203068: Please help me solve this word problem.
Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 60 mils per hour and train B is traveling at 70 mils per hour. Train A passes a station at 5:15 A. M. if train B passes station at 5:27 A.M, what time train b catch up train A?
Thank you!
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 203232: adult ticket prices are 8 dollars kid ticket prices are 5 dollars if 500 tickets were sold and the total amount of the tickets equals 3475 dollars, how do i find how many adult and child ticket prices were sold?
I got the answer I came up with 325 adults, and 175 kids, but HOW do I show the work, how do I set up the equation. it was on my job interview today... i felt really stupid
Click here to see answer by jim_thompson5910(35256) |
Question 203229: The points (1, 3), (2, 5), (8, 17), (50, 101), and (1000, 2001) all lie on line M.
The points (1, -1), (2, -3), (8, -15), (50, -99), and (1000, -1999) all lie on line N.
a. Form the equations of both the lines. Show your work.
b. What are the co-ordinates of the point of intersection of lines M and N?
c. Write the co-ordinates of the intersections of lines M and N with the x-axis.
d. Write the co-ordinates of the intersection of lines M and N with the y-axis. Could you help me with these? This is very difficult for me. You are very much appreciated.
Click here to see answer by Earlsdon(6294) |
Question 203240: For a hiking trip, you are making a mix of x ounces of peanuts and y ounces of chocolate pieces. You want the mix to have less than 70 grams of fat and weigh less than 8ounces. An ounce of peanuts has 14 grams of fat, and an ounce of chocolate pieces has 7 grams of fat. Write and graph a system of inequalities that models the situation
Click here to see answer by ankor@dixie-net.com(22740) |
Question 203326: Find the intersection of the sets {2,5,8,9,11,13} and {3,4,5,6,7,8}.
Click here to see answer by jsmallt9(3758) |
Question 203405: Solve by the elimination method.
7r+3s=38
3r+7s=66
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21r+9s =114
21r-49= 462
58/576
S=? 9.9....?
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7r-3(?)=?
R=?
It doesn’t make sense to me. Can you please help me solving this problem?
Thank you!
Click here to see answer by jsmallt9(3758) |
Question 203422: 1. The face of a $10 bill has an area that can be represented by the expression 10x² + 9x – 40.
(a) Factor the expression to find the dimensions of the bill.
(b) If x represents 32mm, what are the dimensions of the bill?
Click here to see answer by jsmallt9(3758) |
Question 203423: Expand and simlify
(a) -3(x² - xy + 2y²)
-3x²+3xy-6y²
(b) (x – 1)(x + 4)
x²+4x
-x -4
---------------------
x²+3x-4
(c) -2(x + 3)(2x – 1)
-2x-6 (2x-1)
-4x²+2x
-12x+6
--------------------
-4x²-10x+6
(d) (2x – y)²
(2x-y)(2x-y)
4x²-2xy
-2xy+y²
------------------
4x²-4xy+y²
(e) (2x + 3)(3x – 2) – (x + 5)²
(2x+3)(3x-2)-(x+5)(x+5)
1.) (2x+3)(3x-2)
6x²-4x
9x-2
---------------
6x²+5x-2
2.) (x+5)(x+5)
x²+5x
5x+25
----------------
x²+10x+25
3.)(6x²+5x+2)-(x²+10+25)
6x²+5x+2
- x²+10x+25
---------------
5x²-5x-20
Click here to see answer by geE-thug(1) |
Question 203481: I actually attempted the examples in my book but still do not grasp the concept if I can actually get someone to get to break this down for me i might be able to do the rest on my own:
y= -3x+19
y= 2x-1
and
x+3y=2
-x+y=1 thank you
Click here to see answer by stanbon(75887) |
Question 203525: solve the system of equation by graphing.
9x-6y=42
6y-9x=-42
is it consistent or inconsistent
dependant or independant
i'm totally lost with this one, thinking there is no solution, but is that correct?
thanks
Click here to see answer by psbhowmick(878)  |
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