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Recent problems solved by 'Tatiana_Stebko'
Tatiana_Stebko answered: 1326 problems
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1 solutions
Answer 321552 by Tatiana_Stebko(1326)   on 2011-07-09 13:41:03 (Show Source):
You can put this solution on YOUR website!Let x is the coefficient of ratio
Then the angels of a triangle are x, 6x, 8x degrees
The sum of the angels of a triangle is 180 degrees
 degrees
The smallest angle of the triangle is 12 degrees
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Radicals/468635: Add or subtract. Simplify by collecting like radical terms, if possible.
6sqrt(3)-2sqrt(3)+7sqrt(3)=
(Simplify your answer. Type an exact answer, using radicals as needed.)
1 solutions
Answer 321549 by Tatiana_Stebko(1326) on 2011-07-09 13:36:04 (Show Source):
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Radicals/468561: Divide. Then simplify by taking roots, if possible.
〖49〗^(5/2)
The solution is___.
(Simplify your answer. Type an integer or fraction.)
1 solutions
Answer 321533 by Tatiana_Stebko(1326) on 2011-07-09 11:54:15 (Show Source):
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Evaluation_Word_Problems/468567: A camera is priced at P15,000.00 subject to 10% and 5% trade discounts. Determine the:
a. additional trade discount rate that would bring down the price further to P12,440.25
b. single equivalent rate of the three discount rates
1 solutions
Answer 321520 by Tatiana_Stebko(1326) on 2011-07-09 10:48:56 (Show Source):
You can put this solution on YOUR website!P15,000.00 after 10% discount is 15,000.00*(100%-10%)/100%=15,000.00*0.9=13,500.00
P13,500.00 after 5% discount is 13,500.00*(100%-5%)/100%=13,500.00*0.95=12,825.00
a. additional trade discount rate that would bring down the price further to P12,440.25
100%-(12,440.25/12,825.00)*100%=3%
b. single equivalent rate of the three discount rates
100%-(12,440.25/15,000.00)*100%=17.065%
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Radicals/468577: Find the following.
root20:(-3)^20
Select the correct choice below and if necessary, fill in the answer box to complete your choice.
A. root20:(-3)^20 =
B. The root is not a real number.
1 solutions
Answer 321519 by Tatiana_Stebko(1326) on 2011-07-09 10:37:37 (Show Source):
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Radicals/468548: Add. Simplify by collecting like radical terms if possible, assuming that all expressions under radicals represent nonnegative numbers.
√7a + 6√(28a^3)=
(Simplify your answer. Type an exact answer using radicals as needed.)
1 solutions
Answer 321510 by Tatiana_Stebko(1326) on 2011-07-09 05:56:25 (Show Source):
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Graphs/468477: what are the order pairs for y from these equations
Y=2^2x
{(-1, ) (0, ), (1, ), (2, )
y=(1/2)^x
[(-3, ) , (-2, ) , (-1, ), (0, ), (1, , 2, ), (3, )}
1 solutions
Answer 321508 by Tatiana_Stebko(1326) on 2011-07-09 05:33:43 (Show Source):
You can put this solution on YOUR website!
if x=-1 then  Point (-1,0.25)
if x=0 then  Point (0,1)
if x=1 then  Point (1,4)
if x=2 then  Point (2,16)
{(-1,0.25),(0,1),(1,4),(2,16)}
.
if x=-3 then  Point (-3,8)
if x=-2 then  Point (-2,4)
if x=-1 then  Point (-1,2)
if x=0 then  Point (0,1)
if x=1 then  Point (1,0.5)
if x=2 then  Point (2,0.25)
if x=3 then  Point (3,0.125)
{(-3,8),(-2,4),(-1,2),(0,1),(1,0.5),(2,0.25),(3,0.125)}
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Triangles/468523: The three sides of a triangle are 4,7,and 8. I need to find the largest side of a similar triangle whose shortest side is 5
1 solutions
Answer 321505 by Tatiana_Stebko(1326) on 2011-07-09 05:06:22 (Show Source):
You can put this solution on YOUR website!The largest side of a triangle are 4,7,and 8 is 8
The coefficient of proportionality is 
Then the largest side of the similar triangle is 
Answer 10
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Probability-and-statistics/468534: I am begging a tutor to show me how to do these hard homework problems.
The probability of winning is 0.45 every time you play a certain game. Suppose you play the game 10
times.
1. (1 point) Find the probability that you will win exactly 4 times. Round answer to three places after the
decimal point.
I used the formula Pr(x-k)= c(n,k) p^k x q^ (n-k)
so... c(10,4) (.45)^4 x (.55)^(10-4)?
2. (1 point) Find the probability that you will win 2 or more times. Round answer to three places after
the decimal point.
c(10,2) x (.45)^2 x (.55)^(8)?
3. (1 point) Find the expected number of times you will win, and the standard deviation. Round both
answers to three places after the decimal point.
I dont even know how to set this one up...
I think my biggest issue is understanding how to find k
1 solutions
Answer 321495 by Tatiana_Stebko(1326) on 2011-07-09 03:22:36 (Show Source):
You can put this solution on YOUR website!1. (1 point) Find the probability that you will win exactly 4 times. Round answer to three places after the decimal point.
I used the formula Pr(x-k)= c(n,k) p^k x q^ (n-k)
so... c(10,4) (.45)^4 x (.55)^(10-4) - CORRECT
2. (1 point) Find the probability that you will win 2 or more times. Round answer to three places after the decimal point.
P(win 2 or more times)=P(2)+P(3)+P(4)+P(5)+P(6)+P(7)+P(8)+P(9)+P(10)
The best way to solve this problem by opposite event
P(win 2 or more times)=1-P(win less then 2)
P(win less then 2)=P(0)+P(1)
THEN
P(win 2 or more times)=1-(P(0)+P(1))
P(win 2 or more times)=1-(c(10,0)(.45)^0*(.55)^(10-0)+c(10,1)(.45)^1*(.55)^(10-1))
3.(1 point) Find the expected number of times you will win, and the standard deviation. Round both answers to three places after the decimal point.
E(X)=np
n=10, p=0.45
E(X)=10*0.45=4.5
the standard deviation
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test/468495: I am going to take my grad exam again Monday for the 3rd time. I do NOT know how to factor and that is mainly the test. I was wondering someone could please help me???
1 solutions
Answer 321494 by Tatiana_Stebko(1326) on 2011-07-09 02:57:21 (Show Source):
You can put this solution on YOUR website!Do you know problems that could be on your exam, if you have some of them, send them to me please stebko22@gmail.com, I can help you
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logarithm/468526: i have tried to solve this log2(8-6x)=5. i cant seem to figure out what i am doing wrong. i have tried this: 2^5=8-6x. and so i add 8 to both sides and i get 40=6x then i divide both sides by 6 and i 6.666666? please help... thankyou
1 solutions
Answer 321493 by Tatiana_Stebko(1326) on 2011-07-09 02:33:12 (Show Source):
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Linear-equations/468532: Please help me with this algebra problem. Thank you so much in advance.
Please show all work. solve the equation for d
k = 2c - 9d/8
1 solutions
Answer 321483 by Tatiana_Stebko(1326) on 2011-07-09 02:04:27 (Show Source):
You can put this solution on YOUR website!
Multiply both sides of the equation by 8
Divide both sides of the equation by 9
.
.
.
But if your problem looks like
Multiply both sides of the equation by 8
Divide both sides of the equation by 9
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Radicals/468333: ass, Simplify by collecting like radical terms if possible, assuming that all expressions under radical represent nonnegative numbers
V3a + 6V12a^3
the v;s represent the square roots symbol and ^ means it is raising to that power
1 solutions
Answer 321348 by Tatiana_Stebko(1326) on 2011-07-08 13:57:27 (Show Source):
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