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

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Algebra: Inverse operations for addition and multiplication, reciprocals

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Question 197256: I am trying to help my sister with the inverse variation. I am not sure how to do that type of problem. Can you please walk me through step by step?
thanks,
mw
Click here to see answer by stanbon(26297)

Question 197884: What is the multiplicative inverse of 1/3?
Click here to see answer by jim_thompson5910(13794)

Question 197920: 8 less than 28y
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Question 198386: how do i solve fractional equations... 2/8(x) x 5/15?
Help i have a test monday!!!1
Click here to see answer by Alan3354(6097)

Question 199001: 1/19.5 = 1/x - 1/2x (solve for x)
Click here to see answer by stanbon(26297)

Question 199018: The additive inverse of 5 is
1)1 over 5
2)-1 over 5
3)0
4)-5
Click here to see answer by jim_thompson5910(13794)

Question 199967: Find the inverse of: f(x)=3/2x-1
Click here to see answer by jim_thompson5910(13794)

Question 200515: why do we have to have math i mean its so dumb and boreding i mean dang ITS TO HARD
Click here to see answer by cordereal(6)

Question 200529: The brackets may have confused in the previous version of the question I submitted.
This a question for solving electrical resistance in a parallel circuit. The formula is 1/Rt = 1/R1 + 1/R2 +1/R3 + 1/Rn.
Rt represents total resistance the other fractions are separate branch resistances.
1/Rt= 1/12 + 1/15 + 1/5
Rt=?
Thank you
Click here to see answer by solver91311(5072)

Question 200527: 1/R(total)= 1/12 + 1/15 + 1/5
R(total)=?
How is this solved?
Thank you
Click here to see answer by jim_thompson5910(13794)

Question 200800: Please help me solve this equation
{2x-y^2}/ {x-y}
x=10 and y=(-5)
According to the TI-84 the answer is 3 How?
Click here to see answer by jim_thompson5910(13794)

Question 200971: Whch of the following expressions represent the expandecd form of (3x-4y)^2?
A. 9x^2 + 24xy - 16y^2
B. 9x^2 - 24xy = 16y^2
C. 12x^2 + 16y^2
D. 12x^2 - 12xy = 16y^2
Click here to see answer by Alan3354(6097)

Question 203021: If two numbers are opposite of each other, are their reciprocals also opposite of each other?
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Question 204180: Hi, I'm having a problem simplify this problem:
3(5+6b)+8(2a-b)=
The issue I'm having is I can't figure out how to simplifiy it using properties of addition and multiplication. I understand using like terms but it seems I need to do something else to.

Click here to see answer by RAY100(1637)

Question 204759: Determine whether the function has an inverse function and if so, find the inverse function f(x)=x^3+8
Click here to see answer by stanbon(26297)

Question 205044: Given F(x) shown below, complete the equation for the inverse of F(x). If necessary, use the slash mark ( / ) for the division symbol.
f(x)=2x/7+4

F-1(y) = _____
Answer:

Click here to see answer by Earlsdon(4900)

Question 205223: 2x2+9x-5
Click here to see answer by checkley77(7072)

Question 6036: The reciprocal of -2 is,..
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Question 6036: The reciprocal of -2 is,..
Click here to see answer by MathTherapy(337)

Question 205797: 64 = 70 - .003H , solve for H.
I started by moving H to the other side of equation, and putting underneath 64 , but what do I do with 64 ?
Click here to see answer by Targetweek(62)

Question 205797: 64 = 70 - .003H , solve for H.
I started by moving H to the other side of equation, and putting underneath 64 , but what do I do with 64 ?
Click here to see answer by stanbon(26297)

Question 206230: WHAT IS 26 LESS THE SUM OF 12 AND 9
Click here to see answer by Theo(675)

Question 206268: Find the inverse of the function f(x)=-(3/4)x+2
I was given this as the answer (answer Key)..however I don't understand to get to this.
Answer that answer the answer key gives is.
b= -4/3a + 8/3
Click here to see answer by Marth(57)

Question 206270: 1. IN 1990, THERE WERE A NUMBER OF HOUSES IN THE STREET WHRERE BRAD LIVED. TWO YEARS AFTER,5 HOUSES WRE ADDED. SIX DEMOLISHED A YEAR AFTER.IF AT PRESENT THERE WERE 30 HOUSES IN STREET, HOW MANY HOUSES WERE THERE IN 1990
2.A NUMBER WHEN DECREASED BY THE SUM OF 7 AND 8 WILL GIVE YOU 20.WHAT IS THE NUMBER
Click here to see answer by rfer(2688)

Question 207300: How do I get divided by ?
Click here to see answer by Edwin McCravy(2922)

Question 209223: URGENT QUESTION .. HELP NEEDED
the question is-
the difference between a positive fraction and its reciprocal is 9/20
find the sum of that fraction and its reciprocal.
Thanks. a lot
Click here to see answer by Theo(675)

Question 210950This question is from textbook Saxon Math 8/7
: a/b=4 what is b/a=This question is from textbook Saxon Math 8/7

Click here to see answer by stanbon(26297)

Question 210989This question is from textbook holt geometry
: (y+5) = 5/2y I'm having trouble simplifying and solving for yThis question is from textbook holt geometry

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Question 211263This question is from textbook COLLEGE ALGEBRA

: Can you pls help me
3.)y=x^2-4x
•Graph this original function in its entire domain but coloring green that portion of the graph over the limited domain x>=2,

•Find its inverse over x>=-4,
•On another set of coordinate axes, graph this inverse. Color it blue. On this same set of coordinate axis, graph the original f(x) on the limited domainx>= 2, y>=-4 & color it green.
•Draw the line y = x in dotted form.
•Label each graph including the dotted line by the corresponding equation and domain and range. Use the textbox for these labels.
Thanks alot for everybody who is willing to help.I dont know how to post a comment that's why I include this to my queryThis question is from textbook COLLEGE ALGEBRA

Click here to see answer by stanbon(26297)

Question 211263This question is from textbook COLLEGE ALGEBRA

Click here to see answer by jim_thompson5910(13794)

Question 211681: Find the inverse of the function f(x)=8^(4x+9)
Click here to see answer by HyperBrain(694)

Question 212047: what is the state inverse operation
1.add 12
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Question 212300: Find the inverse of y=7x^2-3.
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Question 212737: What is the inverse of 119 under the operation of multiplication?
Click here to see answer by DRichardson(63)

Question 212894: blake has a total of $1200 to invest into 2 accounts. one account earns 6% simple interest and the other earns 7% simple interest. how much should be invested into both accounts to earn exactly $79 at the end of year 1?
? 6% account ? 7% account
Click here to see answer by josmiceli(3013)

Question 212893: solve system of equations using the addition method
3a+2b=7
5a-3b=-1
(?,?)
Click here to see answer by drj(1380)

Question 212892: solve the system using the substution method
5x-4y=-5
7x+y=21
solution (?/33,140/?)
Click here to see answer by drj(1380)

Question 213549: sound travels faster throught solid matter.how fast does sound travel in ice-cold water if it takes 3 secondsto travel 4515 meters?
Click here to see answer by rfer(2688)

Question 213974: I am asking a different question I think
find the product in simplest form: (0.125) x 16 +0.25 x 120
I worked it 0.125 x 16= 2.0000
Click here to see answer by stanbon(26297)

Question 213974: I am asking a different question I think
find the product in simplest form: (0.125) x 16 +0.25 x 120
I worked it 0.125 x 16= 2.0000
Click here to see answer by rfer(2688)

Question 214215: 1/3x+5=9
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Question 214916: how do you solve two-step equations involving whole numbers using inverse operations
Click here to see answer by stanbon(26297)

Question 215916: The quarterly profit of Cunningham Realty depends on the amount of money x spent on advertising/quarter according to the rule

where P(x) and x are measured in thousands of dollars. What is Cunningham's profit when it's quarterly advertising budget is 28,000 ?

Click here to see answer by nerdybill(2448)

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