Questions on Algebra: Equations answered by real tutors!

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Question 419222: solve by the elimination method.
4x+5y=2
8x+10y=4
a.the solution is?
b. there are infinitely many solutions
c. there is no solution
Click here to see answer by Mr. Math Wiz(7)

Question 419240: solve the following system of equations
x+3y=4 (1)
x=5-3y (2)
the solution is?? or there is no solution?
Click here to see answer by Theo(3464)

Question 419240: solve the following system of equations
x+3y=4 (1)
x=5-3y (2)
the solution is?? or there is no solution?
Click here to see answer by duckness73(43)

Question 419228: find the domain of the function g(x)=10/4-5x
choose the correct domain
a. {x|x is a real number and x=10} ( # has a line thru it)
b. {x|x is a real number and > 4/5} the arrow has a line under it
c. {x|x is a real number and x # 4/5} ( # has a line thru it)
d. {x|x is a real number and x#0}( # has a line thru it)
Click here to see answer by ewatrrr(10682)

Question 419297: What is 7245 is expanded notation?
Click here to see answer by rfer(12662)

Question 419451: solve for x: 20000 = 2000e ^6x
how would you get the answer without the use of log?
Click here to see answer by stanbon(57377)

Question 419461: solveusing the addition and multiplication principles.
3x+7x<38
the solution set is {x|x_ _}
Click here to see answer by stanbon(57377)

Question 419463: decide whether the pair of lines is parallel, perpendicular or neither.
5x+2y=5
2x+5y=6
the lines are:
A-neither
B-parallel
c-perpendicular
Click here to see answer by stanbon(57377)

Question 419458: solve the following systems of equations.
x+2y=8 (1)
x=7-2y (2)
a.the solution is??
b. there is no solution
Click here to see answer by stanbon(57377)

Question 419470: pencils are .25 each & notebooks are 1.00 each. if we have $20.00 how many pencils & pens did we puchase? how much did we spend on each. Please show work. thank you.
Click here to see answer by stanbon(57377)

Question 419638: How do i solve this system of equations? 2x+y=12
3x-y=13
Click here to see answer by dnanos(83)

Question 419660: 7/x + x = 16/x
Click here to see answer by nerdybill(6962)

Question 419816: How do you get the answer to 6=a/4+2?
Click here to see answer by nerdybill(6962)

Question 419867: I have tried and tried this equation but when I check it, it does not equal out right.
3/4 = 1-(3x-2)/(x+1)
This is what I am getting:
3/4-1 = 1-1-(3x-2)/(x+1) subtract 1 from both sides
3/4-4/4=-(3x-2)/(x+1)
-1/4=-(3x-2)/(x+1) negatives cancel each other out
1/4=(3x-2)/(x+1) cross multiply
1(x+1)=4(3x-2)
x+1=12x-8 subtract 12x from both sides
-11=-7
x=7/11
Am i doing this right because it does not compute when checking?
Click here to see answer by josmiceli(9686)

Question 420024: 4x squared=14x+8 Please help Parent of student
Click here to see answer by jim_thompson5910(28595)

Question 420083: simplify a complex fraction -3/10 devided by3/5(-2/3)
Click here to see answer by stanbon(57377)

Question 420077: If a car can travel 400km by 2L of gas how many Litres of gas will it take to travel for 7km?
Click here to see answer by rfer(12662)

Question 420095: What is the slope intercept form of 3x+9y=6y-6?
Click here to see answer by algebrahouse.com(1079)

Question 420021: If 30 men can plant a 100 trees in 9 days, how long does it take for 36 men to plant 4400?
Click here to see answer by Edwin McCravy(8909)

Question 420203: can u teach me how to divded 9000 into 1800?

Click here to see answer by Theo(3464)

Question 420331: I don't understand how to work this out,to get the answer:5d = 17.1
Click here to see answer by algebrahouse.com(1079)

Question 420611: Does a positive plus a positive equal a positive or does it equal a negative? Also does a negative plus a negative equal a positive or does it equal a negative? Does a positive plus a negative equal a positive or a negative?
Click here to see answer by stanbon(57377)

Question 420707: solve the system of equations by graphing, then classify as consistent, or inconsistent and as dependent or independent.
5x-6y=-24
6y-5x=24
What is the solution of the system of equations.
a. infinitely many solutions
b. no solution
c. a point
Is it consistent or inconsistent?
are the equations dependent or independent?
Click here to see answer by MathLover1(6634)

Question 420710: solve by the elimination method
7r-8s=-21
8r+7s=89
a.the solution is?
b.there are infinitely many solutions
c.there is no solution
Click here to see answer by mananth(12270)

Question 420762: SOLVE FOR N
2N-3=9-N
Click here to see answer by stanbon(57377)

Question 420907: 2/t+6=3/t-1
Click here to see answer by algebrahouse.com(1079)

Question 421110: what is the answer of 2x-1=15 show the solution

Click here to see answer by nerdybill(6962)

Question 421131: How do I describe how to solve the following using factorization and zero factor property.
1. x^2 -x - 6 = 0
Thank you!

Click here to see answer by algebrahouse.com(1079)

Question 421192: I need help..i don't understand to multiply and simplify
b^15 * b^0 =...wouldn't that be b^)
Click here to see answer by sudhanshu_kmr(1152)

Question 421205: Translate the following into an equation. Do not solve:
The sum of three consecutive odd integers is 85 less than four times the first. What is the first integer?
Click here to see answer by sudhanshu_kmr(1152)

Question 421259: the perimeter of a rectangle is 104.The length exceeds the width by 32 inches. Find the length and the width.
Click here to see answer by josmiceli(9686)

Question 421280: Solve t in the fonnula N = No.e^kt, where No = 2.51.10^-12,
N = 7.23.10^6.No , k = 0.555 (1/s) and e is Neper's number (~ 2.71828).
I FOUND t=28.457
Click here to see answer by josmiceli(9686)

Question 421240: I'm trying to find out how to do these problems examples are:
3n+5=6
4+5x=1
4y-15=-10
Please help
Click here to see answer by rfer(12662)

Question 421399: solve using the multiplication principle
-4x>1/11
the solution set is{x|x_ _}
Click here to see answer by stanbon(57377)

Question 421400: determine whether (-9,-3) is a solution of 8x-3y=-2
is (-9,-3) a solution to the equation?
yes or no
Click here to see answer by stanbon(57377)

Question 421402: solve, then graph
y-2>-14
the solution is {y|y>_}
Click here to see answer by stanbon(57377)

Question 421403: find the slope, if it exists, of the line containing the pair of points.
(7,8) and (9,-7)
a.the slope m=?
b. the slope is undefined
Click here to see answer by stanbon(57377)

Question 421401: use < or> to make the statement true
-3_10??
Click here to see answer by stanbon(57377)

Question 421396: collect like terms
15x+4y-11x-7y
15x+4y-11x-7y=??
Click here to see answer by stanbon(57377)

Question 421408: Find the original price of a pair of shoes if the sales price is $36 after a 20% discount.
Click here to see answer by rfer(12662)

Question 421395: solve
-0.5x<-15
the solution is {x|_}
Click here to see answer by rfer(12662)

Question 421422: How do you simplify -2[3a+(-b)]+3[(-a)+2b)]
Click here to see answer by stanbon(57377)

Question 421430: How do you simplify (-1/4)[24x-(-12y)]
Click here to see answer by algebrahouse.com(1079)

Question 421428: My mom finally gave me the answers because I couldn't get these problems right after numerous attempts. Your solutions will go to her email. I am homeschooled. you said I could ask for solutions to five questions. Here are 5:
((x^2+4x)/(x+3)) ((x^2 – 9)/(x^2 + x – 12)) couldn't get it after 3 tries, the answer is x but I'm not getting the steps to the answer x.

Click here to see answer by algebrahouse.com(1079)

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