Questions on Algebra: Inverse operations for addition and multiplication, reciprocals answered by real tutors!

Tutors Answer Your Questions about Inverses (FREE)

Question 687750: Help me solve this for algebra !
The balances of two investments are changing at steady rates. one investment of $1450 is decreasing by $105.75 each month. write and solve an equation to find how many months it takes the balances of the investments to be the same. let m represent the number of months.
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Question 687888: I need help with this problem: 4(x - 0.5) + 10.5 = 2(x +11.5) - 2.5
Click here to see answer by ReadingBoosters(3246)

Question 687887: I need help with this problem: 5.1x - 11.4 = -0.9x - 17.4
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Question 687886: I need help with this problem: 0.75x + 8= -20 + 0.25x
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Question 687885: I need help with this problem: -3x - 5(2x - 5) =6(-3 - 10)
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Question 692428: i^212
Click here to see answer by Alan3354(69443)

Question 693003: How do you find the quotient of two numbers when the numerator is 0?
Click here to see answer by Edwin McCravy(20054)

Question 694398: How can I salve this math problem (x^3)7
Click here to see answer by Ave(106)

Question 694355:

describe how to solve the equation 5/6x=2/7

Click here to see answer by checkley79(3341)

Question 696576: (-4y)+8y-3z
Click here to see answer by jim_thompson5910(35256)

Question 697147: Solve the following algebraically:

my work:

2x+2=9x then subtract 2x from both sides
2=7x then divide out 7 to get x alone
x=2/7
Click here to see answer by Alan3354(69443)

Question 697229: The difference between one half of a number and one third of a number is nine. Find the number
What is the process of working it out thks
Click here to see answer by rfer(16322)

Question 697281: What is the inverse of y=2x+1
my work:
x=2y+1
I just want to make sure all I have to do is switch the x and y.
Click here to see answer by KMST(5328)

Question 697279: The cost of hiring a bus for a trip to Niagara Falls is $400. The cost per person varies inversely as the number of people who will go on the trip. How much will each person pay if 25 people go on the trip?
my work:
x=cost per person
y=number of people
x(25)=400
divide out 25 from both sides and get $16.00.
I'm not sure if i did the problem right when it says varies inversely.
Click here to see answer by checkley79(3341)

Question 697746: x+3
operation=
inverse operation=
24t
operation=
inverse operation=
Click here to see answer by jim_thompson5910(35256)

Question 697867: Jake thinks of a number.
He adds on 20% of the number and then doubles the answer.
The result is 48. What was the number Jake first thought of?
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Question 697947: Can you please help me solve this equation:
Click here to see answer by Alan3354(69443)

Question 698351: solution of f(x)=x^x
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Question 699758: Whats the process of making b the subject of the formulae ?
a/c + b = d
(/ = divided by)
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Question 700165: what is the inverse function of the function: y=2x^2+3x+1?
Click here to see answer by solver91311(24713)

Question 700274: -6=a/15

Click here to see answer by rfer(16322)

Question 700976: what should be added to both sides of this equation to solve for the variable?
m+(-9)=12
Click here to see answer by checkley79(3341)

Question 701544: How can you determine if this equation is a direct variation and what the constant is?
y+8= -x
Thank you
Click here to see answer by jim_thompson5910(35256)

Question 702011: an arena bought 3248 hot dog wieners to sell at a game.
there are 8 buns in each packages.
how many packages does the arena need to buy.
PLEASE HELP ME.
Click here to see answer by jim_thompson5910(35256)

Question 702122: 2(y-3)=4y+6
Click here to see answer by sofiyac(983)

Question 706314: 8t+13=3 I have tried subtracting 13 from both sides getting 8t= -10 now what?
Click here to see answer by nerdybill(7384)

Question 709347: 1. )what is the inverse equation to A=f(r)= (pi)r^2 , r is >or= 0 ?
2.) solve: f(g(x)) using f(x)=3x-1 and g(x)=1-x^2
Click here to see answer by josgarithmetic(39614)

Question 710074: If five carpenters can finish 30 tables in 2 days, how long will it take 8 carpenters to finish 100 tables?
Click here to see answer by sachi(548)

Question 710214: solve for g: r=(pi)*(g(r))^2

Click here to see answer by MathLover1(20849)

Question 712502: what is the inverse operation of:
f(x)=1/5x+12
Click here to see answer by ankor@dixie-net.com(22740)

Question 713105: what is the solution of x-12=8?

Click here to see answer by Jamil Ahmed Tanjum(3)

Question 714911: design a polygon that is not a rectangle and has an area of eight square unit.

HElP ME PLEASE
Click here to see answer by jim_thompson5910(35256)

Question 715908: Explain, in complete sentences, how you would use the elimination method to solve the following system of equations. Provide the solution to the system.
2x - 5y = -12
3x - 4y = 3
Click here to see answer by stanbon(75887)

Question 717078: Asked: inverse function of x = y^2 - y
already done:
y = x^2 - x
But how do I get a function with y=... out of this?
Is this possible?
Click here to see answer by jsmallt9(3758)

Question 717175: I need help finding the inverse for
f(x)= 2x-1/3

Click here to see answer by solver91311(24713)

Question 717771: if q and f are inverse functions and q(2)=10, What is f(4)?
Click here to see answer by DrBeeee(684)

Question 719593: what is the inverse of 3/4x

Click here to see answer by checkley79(3341)

Question 720281: I know the solution but I don't know how to get there. R=r/1-t solve for t
Click here to see answer by Simnepi(216)

Question 723882: Use the communative law of multiplication to write an equivalent expression for s+5t
Click here to see answer by MathLover1(20849)

Question 724760: 3/4 + n = 1
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Question 725660:
Click here to see answer by General_Lee87(58)

Question 731958: If the value of x is not equal to zero,
1/x is called the inverse of x. On the answer
sheet write two such numbers (with their inverses) whereby the inverse of the
greater number is greater than the inverse of the smaller number.
Click here to see answer by lynnlo(4176)

Question 734940: how do i find the inverse equation to 1/3x?2
Click here to see answer by Alan3354(69443)

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