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

Tutors Answer Your Questions about Inverses (FREE)

Question 241262: (t^3-t^2+t-1) divided by (t+1)
Click here to see answer by stanbon(75887)

Question 241553: a fulcrum is placed under the center of a board. in order for two objects to balance on the board, the distance (in feet ) of each object from the center of the board must vary inversely with its weight (in pounds) . what is the distance of each object from the center of the board ?

(7.5 lb)a___________5ft______b (12.5 lb)
the distance between two objects is 5ft

Click here to see answer by checkley77(12844)

Question 241818: Hi!
im having a hard time with inverse operations.
the homework problem is this one:
State the inverse operation.
#1.add 18 and #2.subtract 31
i really apreciate the help!
thank you

Click here to see answer by stanbon(75887)

Question 241827: what is the Multiplicative Inverse of 6=4/7u?
Click here to see answer by stanbon(75887)

Question 242204: Find the reciprocal of

1/6 (-7-6) Help me find the reciprocal of this problem. i just need to know how to solve it.
Click here to see answer by solver91311(24713)

Question 242259: I dont understand this problem,how do I go about solving 2/5k=22?
Click here to see answer by nyc_function(2741)

Question 242266: How do I go about solving -7=x/5
Click here to see answer by nyc_function(2741)

Question 242268: 20= -3/8d how do I go about solving this 20=-3 eights d
Click here to see answer by nyc_function(2741)

Question 242574: f(X)= the square root of x-1
g(x)= 2x
is F(x) an inverse of g(x)
Click here to see answer by stanbon(75887)

Question 242720: find the inverse function of f(x)=4x+2
Click here to see answer by rapaljer(4671)

Question 242808: Find the domain and range of the INVERSE of the given function.
Square root x-3
I think the answer is Domain [0,infenity), Range [3,0) or the answer might be Domain: all real numbers; range [3,infenity).
Click here to see answer by rapaljer(4671)

Question 242817: How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t)=400e^0.045t, where t is the time in years? Round to the nearest hunderedth year.
The answeres could be
A: 18.00 years
B: 133.14 years
C: 148.55 years
D: 15.40 years
I think the answer is 15.40 years. Please let me know for sure.
Click here to see answer by MRperkins(300)

Question 242972: x varies inversely with y. When x is 40, y is 50. What is y when x is 25?
Click here to see answer by nerdybill(7384)

Question 242972: x varies inversely with y. When x is 40, y is 50. What is y when x is 25?
Click here to see answer by Edwin McCravy(20054)

Question 243402: Which of the following numbers is equal to one-fourth of its own reciprocal?
a) 1/8 b) 1/4 c) 1/2 d) 2 e) 4
Click here to see answer by Theo(13342)

Question 244730: what is the step for 6n=27
Click here to see answer by edjones(8007)

Question 246151: if y varies directly as x and inversely as z^2, and y=3 when x=2 and z=4 what is the value of x when y=9 and z=4?
Click here to see answer by dabanfield(803)

Question 246862: what is the reciprocal for 5/8

Click here to see answer by richwmiller(17219)

Question 247791: FIND THE FORMULA
A/B=C/D
D=4
C=6
B=8

Click here to see answer by unlockmath(1688)

Question 248610: I don't understand how to solve this problem;
solve for variable;
8 + 18/w = 14 ( the answer is 3) but I do not know the process to come up with this answer.
Thanks for your help!
Click here to see answer by jim_thompson5910(35256)

Question 249282: what is the inverse of 1/2x^3?
Click here to see answer by College Student(505)

Question 250575: Morgan has an 81/2-foot board that must be cut into boards that are 5/6 feet long. How many of the smaller boards can he get from the 81/2-foot board?
Click here to see answer by richwmiller(17219)

Question 250829: what is the inverse of f(x) = 5x-10?
Click here to see answer by edjones(8007)

Question 250855: a(t) = 48/3t+4
Click here to see answer by drk(1908)

Question 253237: solve using the addition and multiplication principles. 2.4x+19.2>48.0-7.2x.
Click here to see answer by drk(1908)

Question 253238: A certain kind of animal weighs about 77 pounds at birth and gains about two pounds per day for the first few weeks. Determine the days for which the animal's weight is more than 129 pounds.
Click here to see answer by stanbon(75887)

Question 253561: I am working on inverse operations and need some assistance with the following problem:
10 -A = 3.4
Is the correct answer
A=6.6
Click here to see answer by drk(1908)

Question 255039: solve -2x = 1/9th
Click here to see answer by unlockmath(1688)

Question 255390: 1/3x-7= -12 using additive and multiplicative inverse with rational numbers
Click here to see answer by richwmiller(17219)

Question 256175: Find the additive inverse of each number
1. -2 - 3i
2. 1 + 4i
3. 5 - 3i
4. -7 + 2i
Click here to see answer by drk(1908)

Question 256500: 115.4 = (19600/8m) + (m/2) How do I solve for m?
Click here to see answer by solver91311(24713)

Question 256605: 8y-3=17-2y
Click here to see answer by richwmiller(17219)

Question 256604: 1/2(2n+6)=5n-12-n
Click here to see answer by checkley77(12844)

Question 256606: 2n+6=7n-9
Click here to see answer by checkley77(12844)

Question 256606: 2n+6=7n-9
Click here to see answer by palanisamy(496)

Question 256602: 3(x-4)-4=5x+6.9-3x
Click here to see answer by drk(1908)

Question 256602: 3(x-4)-4=5x+6.9-3x
Click here to see answer by checkley77(12844)

Question 256620: 3.6+7.2<25.2
Click here to see answer by drk(1908)

Question 256622: 12n+26>-10

Click here to see answer by holly_taylor(1)

Question 256933: X + 5 + X + X - 45 = 392
I come up with X = 144?
Click here to see answer by Fombitz(32388)

Question 256964: how do you do inverse operations??
Click here to see answer by stanbon(75887)

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