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

Tutors Answer Your Questions about Inverses (FREE)

Question 477189: Which value of x is not allowed in this fraction x^2
______
1+2x
I was shown the answer but don't understand why. The explanation didn't make sense, so I am looking for someone else who can explain why the answer is what it is.
Click here to see answer by Alan3354(30993)

Question 477888: What is the inverse of f(x)=(x-7)^3
I know you change out f(x) to y: y=(x-7)^3
Then swap x and y: x=(y-7)^3...But now I am stuck as to what numbers will come back over with y..Can you help?
Click here to see answer by mangopeeler07(462)

Question 479631: the sum of a number and its reciprocal is 34/15
Click here to see answer by MathLover1(6638)

Question 479950: what is a counter example for the reciprocal of each natural number is a natural number
Click here to see answer by tinbar(128)

Question 479953: what is a counterexample for the opposite of each whole number is a whole number
Click here to see answer by tinbar(128)

Question 481128: The one-to-one function is defined by
f(x) = x/(8-9x)
Find f^-1, the inverse of f . Then, give the domain and range of f^-1 using interval notation.
Click here to see answer by stanbon(57387)

Question 482432: what do you do to find the reciprocal of a number?
Click here to see answer by stanbon(57387)

Question 482440: x + 3 = m
How do you find the value of x?
Click here to see answer by richard1234(5390)

Question 482596: How do I answer this?: .75=x-275/80
Click here to see answer by Theo(3464)

Question 484955: use the commutative law of multiplication to write an equivalent expression
a(s+3)
Click here to see answer by Tatiana_Stebko(1326)

Question 484954: use the associative law of addition to write an equivalent expression
8r+(s+t)
Click here to see answer by Tatiana_Stebko(1326)

Question 484960: simplify. please show all your work. write your final answer exactly as a fraction in lowest term
35/110
Click here to see answer by Tatiana_Stebko(1326)

Question 484957: find the prime fractorization of 594
show all your work
Click here to see answer by Alan3354(30993)

Question 485178: 3r +1.5=r+4.5
Click here to see answer by rfer(12670)

Question 485641: how to write 5 more than the product of a number and 3
Click here to see answer by Theo(3464)

Question 487294: my step-daughter saw an algebra problem that had an exclamation point ( ! )in the expression looking like this ... 4! ... with an answer that the teacher said was correct. What does the ! mean in algebra?
Click here to see answer by josmiceli(9697)

Question 487402: 1 simplify 0/8
2 simplfy
-7y - (-4y + 8)
Click here to see answer by unlockmath(1603)

Question 489113: simplify
(-3w)*3
Click here to see answer by rfer(12670)

Question 489117: perform the indicated operation and, if possible simplify. show all of your work
-28/39 / 20/9
Click here to see answer by rfer(12670)

Question 489123: perform the indicated operation and, if possible simplify. show all of your work
3/4-{-5/8}
Click here to see answer by rfer(12670)

Question 489126: perform the indicated operation and, if possible simplify. show all of your work
1/11+{-5/6}
Click here to see answer by rfer(12670)

Question 489116: evaluate and if possible, simplify
30/-15-x for x=-15
Click here to see answer by rfer(12670)

Question 489479: if f^-1 is the inverse of f, determine the value of f(f^-1(5))
Click here to see answer by richard1234(5390)

Question 490583: When comparing two numbers for the "mid value" such as:
34 x 56/ 34 + 56 =x the problem is self explanatory. But, I am trying to solve the same type of problem with the answer known and one of the numbers an unkown, such as:
34 x X/34 + X = 21.1555
Everything I have tried tells me I don't know how to approach this problem Can you please help?
Thanks,
Quaedan

Click here to see answer by Edwin McCravy(8909)

Question 494143: how do we solve 2x +15 = 3x ?
Click here to see answer by rfer(12670)

Question 494830: What is the inverse of multiplying by 2
Click here to see answer by nerdybill(6962)

Question 496308: simplify 108
Click here to see answer by Alan3354(30993)

Question 499262: x-4=15
I tried adding 4 to 15 and four and x and four but I could not figure it out.
Click here to see answer by Alan3354(30993)

Question 499262: x-4=15
I tried adding 4 to 15 and four and x and four but I could not figure it out.
Click here to see answer by deborabr(181)

Question 499317: (-2 + 2)x + 6
Click here to see answer by goldenzenith(2)

Question 496735: multiply -6/7 and 11/12
Click here to see answer by Flannery(124)

Question 496544: state the inverse operation: add 36
Click here to see answer by Flannery(124)

Question 494473: what is the multiplicative inverse or reciprocal, of 2 2/5 ?
Click here to see answer by Flannery(124)

Question 490316: what is the multiplicative inverse of -5/6?
Click here to see answer by Flannery(124)

Question 489972: 63+17-19-17+21+19

Click here to see answer by Flannery(124)

Question 489813: }
Click here to see answer by Flannery(124)

Question 487453: What is the inverse operation of addition
Click here to see answer by Flannery(124)

Question 472592: mulitplication inverse of -5/3
Click here to see answer by Flannery(124)

Question 500931: CAN YOU WORK THIS PROBLEM OUT AND SHOW YOUR WORK 5 * 64Y
-------
32 * 100
Click here to see answer by Flannery(124)

Question 489297: "What is a middle school level example of inverse operations?"
Click here to see answer by Flannery(124)

Question 501159: what is the answer to 21n=7

Click here to see answer by MathLover1(6638)

Question 465774: how do i turn -3x+y=12 into a function form?
Click here to see answer by Flannery(124)

Question 443961: -3x+5=-1
Click here to see answer by Flannery(124)

Question 502677: five times a number is 30.Let x represent the number.Then an equation is 5x=30.solve the equation.What is the number?
Click here to see answer by Alan3354(30993)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350