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

Tutors Answer Your Questions about Inverses (FREE)

Question 24522: can you pease help me solve- 11
_____
_ 13 by example.. thank you

or written as -11 - ( -13)
Click here to see answer by elima(1433)

Question 24729: what is 9d-1=-25
Click here to see answer by rapaljer(4671)

Question 24773: Solve: x-1/6=4? and solve: x-13/3=-199/30
Click here to see answer by Alwayscheerful(414)

Question 25274: 1) Let R and S be rings and define R x S = {(r,s):rES} to be the set of all pairs (r,s) with r ER and s ES. Define furthermore the addition and multiplication in R x S componentwise by (r1,s1)+(r2,s2)=(r1+r2,s1+s2) and (r1,s1).(r2,s2)=(r1.r2,s1.s2)
a) show that R x S is a ring again.
b) show that if R and S both have an identity element then so does R x S.
c) show that R x S has non-zero, non-regular elements if R and S both are different from the zero-ring.
d) Can R x S ever be a field? Justify your answer!
Click here to see answer by kev82(151)

Question 25641: Give all units and regular elements in clock 8
Click here to see answer by stanbon(75887)

Question 25704: How do i show for intergers a,b and c from which at most one is 0(zero):
gcd(a,gcd(b,c)) = gcd(gcd(a,b),c)
Click here to see answer by venugopalramana(3286)

Question 26178: I am trying to learn the multiplication pricipals of equality. I am having a problem with the fractions portion of this section if you could please help.
for example: x/10=8
Click here to see answer by stanbon(75887)

Question 25503: give all units and regular elements in Clock(8)

Click here to see answer by stanbon(75887)

Question 25458: (a)Find the (multiplicative) inverse of the complex number (3-i)^2 in the form a+ib, a,b belongs to the reals(R).
(b) solve the equation (((1+i)^5)x)= ((1-i)^3) in the ring C of complex numbers (also as number of the form a+ib, a,b belong to the reals(R).
Click here to see answer by venugopalramana(3286)

Question 26507: please help me solve this equation: 1/a + 1/b = 1/c, solve for c
Click here to see answer by longjonsilver(2297)

Question 28091: I am having trouble with inverse operations HELP! is there a trick to memorize the setps?!?! Also
what is the anwer to the foloowing?
12h=60
and
k- 14=29
n divided by 6 = -9???????????????????????????????????????
Click here to see answer by longjonsilver(2297)

Question 28452: How do you find a rate if the problem is :

Distance= Rate*Time
d=rt

Click here to see answer by wuwei96815(245)

Question 26703: please help me solve this equation
please help me solve this equation
Click here to see answer by drizzit66@yahoo.com(2)

Question 29543: need help with this problem:4k+5-2k=3k+1, and this problem: 5-(x-3)=7x-9
Click here to see answer by sdmmadam@yahoo.com(530)

Question 30992: How do you find the inverse of each function?
f(x)=(x+3)2 -2
Click here to see answer by longjonsilver(2297)

Question 31226: Can someone please help me solve this problem? Let f(x)=2x/x-1. Find the inverse function f^-1(x).
Click here to see answer by venugopalramana(3286)

Question 21382: How do i solve a problem using direct and inverse variation?

Click here to see answer by stanbon(75887)

Question 31664: I dont kow the answer to these questions: m - (-7/10) = 1 1/5 , K - 3/4 = 2/5
Click here to see answer by checkley71(8403)

Question 31612: Given a function g(x)=3^x, find the equation for its inverse, g^-1(x).
Click here to see answer by stanbon(75887)

Question 33538: solve for inverse function f(x)= 5x-3/2x+1 y=5x-3/2x+1 x=5y-3/2y+1 and from here I don't know the next step.
Click here to see answer by venugopalramana(3286)

Question 33647: Let f(x)=x+4/x-3 Find inverse function f^-1(x)
Click here to see answer by longjonsilver(2297)

Question 33777: find the inverse of the following functions:
1) f(x)=2x+1
2) f(x)=(2x+5)/4
Click here to see answer by Nate(3500)

Question 33774: Which of the following functions have inverses:
a) f(x)=absolute value of x-6
b) f(x)=ax + b, a not equal to 0
c) f(x)=x^3-19
Click here to see answer by venugopalramana(3286)

Question 34403: 3 friends share a fullbag of jellybeans. Mike took 1/3 of the jellybeans in the full bag ,Zac took 1/2 of the jellybeans in the fullbag and Kary took what was left. Mike ate 1/2 of his jellybeans, Zac ate 1/3 of his jellybeans and Kary ate all of hers. If Mike & zac now have a total of 45 jellybeans together,
howmany jellybeans did Kary eat?
Click here to see answer by tmarienatree(17)

Question 34450: Looking for some help I do not think this can be divided,
What do you think
(t^3-t^2+t-1)divided by (t+1)
thanks
Click here to see answer by venugopalramana(3286)

Question 34472: looking for some help. I am taking Introductory Algebra and I posted this last night, but I think the answer is at a higher level algebra.
(t^3-t^2+t-1)divided by(t+1)
the only way I can divide any thing into it is to use (t-1) so could it be N.S.
thanks
Click here to see answer by stanbon(75887)

Question 34800: i am very confused on this whole thing!! LoL im in the 8th grade at MSMS and im confused!!help me=)
Click here to see answer by longjonsilver(2297)

Question 34894: Please help me solve this problem ((( X2 = 25))) (the 2 is a little 2 like 2nd power
Click here to see answer by stanbon(75887)

Question 34894: Please help me solve this problem ((( X2 = 25))) (the 2 is a little 2 like 2nd power
Click here to see answer by checkley71(8403)

Question 34897: 5x+20=-10
Click here to see answer by askmemath(368)

Question 35058: Hello,
My name is Kristin and my time for the college placement exam is approaching and I need help!!!!!so please help b/c I keep getting different answers that do not appear in the multiple choice answers.
question: (x^2-4/5x) X (30/3x-6=)
multiple choice ans:
a. 4
b. 2(x+2)
c. 2(x-2)/x
d.2(x+2)/x
e. 4/3
THANK YOU IN ADVANCE,
KRISTIN

Click here to see answer by longjonsilver(2297)

Question 35031: .1166meg ohms/ 1/.22meg ohms + 1/1meg ohms + 1/x
how do I solve for x?
Click here to see answer by stanbon(75887)

Question 35031: .1166meg ohms/ 1/.22meg ohms + 1/1meg ohms + 1/x
how do I solve for x?
Click here to see answer by Prithwis(166)

Question 35206: there are 3 times as many pears as oranges. If a group of children receives 5 organges each, there will be no oranges left over. If the same group of children receives 8 pears each, there will be 21 pears left over. How many children and organges are there?

Click here to see answer by stanbon(75887)

Question 35327: Using FOIL, simplify the expression.
Show that a particular factoring formula leads to the same answer.
Need to show the steps of FOIL one by one.
(4x-2)(-4x-2)
Click here to see answer by checkley71(8403)

Question 35358: 4x/5=2x/7
Click here to see answer by lyra(94)

Question 35419: 1/2 x m = 3/6
Click here to see answer by rapaljer(4671)

Question 35444: The topic is find formula for the inverse of each of the following:
f(x)=x+5
f(x)+(x-2)square3 +5
g(x)=x+4dividedby3-x
f9x0+9x-2)square2+2
these are the four problems if you could please help solve them for me to better understand them. Thank you
Click here to see answer by stanbon(75887)

Question 36334: m over 6.9 = 0.47 Please help this confused mom explain this to her daughter!
Click here to see answer by Nate(3500)

Question 36089: use the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex. Note: It is not necessary to find the roots; just determine the number and types of solutions.
5x^2 + 8x + 7 = 0
Click here to see answer by venugopalramana(3286)

Question 36561: If with x greater than or equal to -1, find and state the domain and range.
On this one, I know the inverse is , but the domain and range have me stuck!!!
Thanks again,
Jamie

Click here to see answer by Nate(3500)

Question 36524: My Friend and I have tried to find the inverse of this problem but we can't seem to get anything to work. our teacher hasn't discussed this with the class and now we have a project due monday on it.
the equation is BIM= W*704.5/H^2
BIM= Body Mass indicator, a mathematical formula used to determine how healthy an individual is
W= Weight of person in pounds
H= Height of person in inches
we are looking for an inverse that we have the weight but we need to find the hieght. the person weights 100 lbs.
we've tried changing the equation into (100*704.5)*H^-2 among many other things. thanks for helping if you can.
Click here to see answer by stanbon(75887)

Question 37297: the question is the sum of a number and 6 times it's receiprocal is -5. How do I solve this?
Click here to see answer by jcmtnez(53)

Question 37388: The "floor" of a fraction is defined to be the largest integer which is not greater than that fraction. For instance, floor[10/3]=3. Evaluate:
floor[floor(1000/7)/floor(71/2)].
Click here to see answer by fractalier(6550)

Question 37415: my 3rd grader came home with this in her math homework & I can not figure it out _________ divided by 7 = 500
CAn you please help
Click here to see answer by fractalier(6550)

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