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

Tutors Answer Your Questions about Inverses (FREE)

Question 216755: What is the inverse equation of d=.15(c-10)? and can you evaluate the inverse function for d=18?
Click here to see answer by jsmallt9(3296)

Question 217239: If , find
Me and my friend are working on this problem together. We started by switching the x values with the y values:

Then we subtracted 3 from each side:

We tried taking the ln of each side but got really confused. Can you please help us with this problem. Thanks in advance. =)
Click here to see answer by jim_thompson5910(28579)

Question 217944: Find the inverse of y = (3x) / (x-2) and state the domain of the inverse.
I have tried switching the x's for y. I get stuck at this step of the problem:
{(xy)-(2x)} / 3
I've looked online for inverse help, but nothing makes sense! Everyone just says switch the x for y.
Thanks
Click here to see answer by RAY100(1637)

Question 218147: 100-4=6w
Click here to see answer by rfer(12657)

Question 219015: how would i solve -6+ 4y =3
Click here to see answer by jim_thompson5910(28579)

Question 219015: how would i solve -6+ 4y =3
Click here to see answer by stanbon(57307)

Question 219165: k/13=7 show me step by step on how to do it in fraction form
Click here to see answer by checkley77(12569)

Question 219867: how do you figure a percent of change?
Click here to see answer by stanbon(57307)

Question 220242: determine the reciprocal of 1 over f plus 1 over g
1/f + 1/g.
for what values of f and g is the reciprocal defined?
Click here to see answer by jim_thompson5910(28579)

Question 220949: I am confused on how I should solve this problem: Solve for the indicated letter
e=6f solve for F
Click here to see answer by vleith(2825)

Question 222263: 5+4x+(-3)=-10
Click here to see answer by rfer(12657)

Question 222269: 0.3(4+x)=4.5 could you show it step by step
Click here to see answer by rfer(12657)

Question 222269: 0.3(4+x)=4.5 could you show it step by step
Click here to see answer by stanbon(57307)

Question 222507: wat is a good website for math answers i need help plz plz plz plz plz plz plz plz plz plz
Click here to see answer by Alan3354(30993)

Question 222993: which of the four functions below has an inverse which is the same as the function itself?
A: f(x)=x-3
B: f(x)=1/2x
C: f(x)=-x-2
D: f(x)= the square root of x+2
Click here to see answer by Theo(3458)

Question 223073: I need help with this one. I came up with three different answers!
-7/8x = -9/10
Click here to see answer by rfer(12657)

Question 223466: what is the multiplication inverse of -5/8
Click here to see answer by jim_thompson5910(28579)

Question 223565: what is the inverse operation for "add 17". It says that in my math textbook but I just don't get it
Click here to see answer by faeron13(1)

Question 224303: What is the inverse operation of multiplication?

A. Division
B. Multiplication

C. Subtraction

D. Addition

Click here to see answer by rapaljer(4667)

Question 225325: 3x=27
Click here to see answer by LtAurora(115)

Question 225652: A stray dog ate 12 of ur muffins. That was 3/10 of all of them! With how many did u start
Click here to see answer by checkley77(12569)

Question 226118: how do i find the answer to this problem. like what are the steps i need.
3(x-2) = 18
12(2-x)= 6
9/2 (x+3) = 27
thanks
Click here to see answer by Isabellaksmith(3)

Question 226321: If x and y are directly related when x = 2 and y = 7, find y when x =8
Click here to see answer by drj(1380)

Question 226540: how many 4-inches by 8 inch bricks are needed to build a walk 6ft. wide and 24ft long.
Click here to see answer by Alan3354(30993)

Question 226572: -4x=-32

Click here to see answer by jim_thompson5910(28579)

Question 226572: -4x=-32

Click here to see answer by RAY100(1637)

Question 226607: what is the answer and how do you solve this problem -8=-2/3x.

Click here to see answer by RAY100(1637)

Question 226597: 8p=-8

Click here to see answer by rfer(12657)

Question 182968: y+4=7 y-4=y 7-4=3 3+4=7 y=3
2y+8=12 2/y=y 8/2 =4 y=4
1/3y+3=1/4
2(x)+3/2(x)-3=1
Click here to see answer by master(1)

Question 227265: 4 1/2 +p =9 1/2
Click here to see answer by rfer(12657)

Question 227285: -n=40

Click here to see answer by checkley77(12569)

Question 227644: I cant figure out -r=38?
Click here to see answer by Edwin McCravy(8908)

Question 227627: Determine if f(x)=(3x+2)/5 is one to one. If so, find its inverse
Click here to see answer by user_dude2008(1861)

Question 230233: (1) How do you work these problem out?
26 more than s is 30 1/3
(2) The product of t and 25 is 175
(3) 2/5 of a number equals 4

Click here to see answer by ankor@dixie-net.com(15649)

Question 230964: if f(x)=3x-1 and g(x)=(x+1)/3 show g(f(x))

Click here to see answer by user_dude2008(1861)

Question 230983: [7+(10+4)/7]*3
Evaluate.
Help please the / is not a fraction it is divided by the 7 and I do not no how else to type it. Do you? Can someone please help.
Click here to see answer by unlockmath(1599)

Question 231212: find the value of a plus b if a = -6 and b= -4
Click here to see answer by Alan3354(30993)

Question 231441: x-3z = -2
3x + y - 2z = 5
2x + 2y + z = 4
could some one help me please
Click here to see answer by algebrapro18(206)

Question 232282: Hello where do i find the multiplication,division,and second power sign. Thank you have a good day.
Click here to see answer by stanbon(57307)

Question 232822: three resistors with values of 1000 ohms, 2200 ohms and 3900 ohms are wired in parallel.To find the total resistance one must add the reciprocals.In the book I am studying the formula to solve is given as:
1/R = 1/R1 + 1/R2 + 1/R3 = 1/1K + 1/2.2K + 1/3.9K = 1/584.5, therefore R = 584.5 ohms
Can you show me how this answer is computed in long hand?
Thanks,
David
Click here to see answer by Alan3354(30993)

Question 233014: Weight varies directly with gravity. A Mars lender weighed 767 pounds on Earth but only 291 pounds on Mars. Its Accompanying Mars rover weighed 155 pounds on Mars. How much did it weigh on Earth? Round your answer to the nearest pound.
Click here to see answer by ankor@dixie-net.com(15649)

Question 233235: Solve for s
1/r=1/s+1/t
Click here to see answer by Alan3354(30993)

Question 233235: Solve for s
1/r=1/s+1/t
Click here to see answer by Stitch(352)

Question 233247: Solve for t
w=a^2/t
Click here to see answer by rfer(12657)

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