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Rational-functions/292065: what are all the zeros in the function y=x3-2x2-3x+6
1 solutions

Answer 211061 by richwmiller(9135) on 2010-04-14 07:41:51 (Show Source):

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here are the factors.
y = (x-2) (x^2-3)

Sequences-and-series/291989: Please help me with the following number sequences:
18, 9, 11, 14, 7, 9, 12 what comes next?
20, 23, 28, 14, 17, 22, 11 what comes next?
4,12, 6, 12,36, 18, 36 what comes next?
thanks,
Heather
1 solutions

Answer 211060 by richwmiller(9135) on 2010-04-14 07:39:14 (Show Source):

You can put this solution on YOUR website!
Some website rules you won't like:
You are limited to one problem per submission. [One problem at a time.]
To be sure we understand each other, one means one not two or three or more.
No more than 4 submissions daily. [4 problems a day]
No similar problems. [Different type problems only.]

Numbers_Word_Problems/292028: 1st question- If four times a number added to 3 is divided by the number plus 8, the result is seven halves. find the number.
----------------------------------------------------
2nd question- One custodian cleans a suite of offices in 5 hours. When a second worker is asked to join the regular custodian, the job takes only 2 1/2 hours. How long does it take the second worker to do the same job alone?
thank you
1 solutions

Answer 211059 by richwmiller(9135) on 2010-04-14 07:33:38 (Show Source):

Sequences-and-series/292044: Find the value of this product of 98 numbers
(1 - 2/3) (1 - 2/4)(1 - 2/5).....(1 - 2/98) (1 - 2/99)(1 - 2/100)
a 1/10 b 98/100 c 1/6 d 1/582120 e 1/4950

1 solutions

Answer 211057 by richwmiller(9135) on 2010-04-14 07:30:29 (Show Source):

You can put this solution on YOUR website!
Do not submit more than 4 a day.

Permutations/292038: Four children Alice, Brad, Cathy and Dan are arranged in a line. If Brad and Cathy cannot be next to each other, in how many ways can the kids be arranged?
A) 6 (B) 12 (C) 14 (D) 16 (E) 24

1 solutions

Answer 211056 by richwmiller(9135) on 2010-04-14 07:29:13 (Show Source):

You can put this solution on YOUR website!
Do not submit more than 4 a day.

Miscellaneous_Word_Problems/292050: When water freezes, the ice occupies a volume 9% greater than that of the water. how much water must be frozen to make 872 cubic meter of ice ?
A 800 m^3 b 880 m^3 c 950 m^3 d 990 m^3 e none of these

1 solutions

Answer 211054 by richwmiller(9135) on 2010-04-14 07:27:00 (Show Source):

You can put this solution on YOUR website!
It has to be less than 872
The only one that is less is 800
So if it isn't 800 then it is none of these.
1.09*800=872
It is 800
another way to solve this is
1.09x=872
x=800

Equations/292063: Dear tutors, I am not really sure if this is under the right context so forgive me if it isn't. I have a word problem.
Form an equation in "x" and solve it to find my father's age.PLEASE SHOW YOUR WORKINGS AND INCLUDE EXPLANATION FOR WHY YOU DID ANY THING. PLEASE GET BACK TO ME AS SOON AS POSSIBLE.
Thank-You so much, please get back to me as soon as possible.
1 solutions

Answer 211053 by richwmiller(9135) on 2010-04-14 07:21:37 (Show Source):

You can put this solution on YOUR website!
Dear Student,
Don't yell at us. (Capital letters on the internet is shouting)
And you admit it is a word problem and can tell it is about age so why isn't it in the age word problems? or at least word problems?
And everyone here wants everything now or earlier. Why should we cater to you?
Show some courtesy.

Rate-of-work-word-problems/292051: Donald can pick 25% more apples than Roman in the same amount of time. If together they can pick 90 apples in an hour , how long would it take Donald to pick 120 apples ?
A 2 hrs b 2hrs &24 minutes c 2hrs &40 minutes d 3 hrs e none of these

1 solutions

Answer 211052 by richwmiller(9135) on 2010-04-14 07:17:18 (Show Source):

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x+1.25x=90
2.25x=90
x=90/2.25
x=40
roman picks 40 and Donald 50 in hour
120/50=12/5=2 hours and 2/5
2/5*60=24 minutes
2 hours 24 minutes for donald to pick 120 apples.

Trigonometry-basics/292060: find the length of the missing side if the hypotenuse is 5 sqrt 3 and the short side is 5.
is it 5 sqrt 2?
thanks:)
1 solutions

Answer 211051 by richwmiller(9135) on 2010-04-14 07:03:01 (Show Source):

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yes

Equations/292059: One factor of x^3 + 5x^2 + 2x - 8 is (x + 4). Find the remaining factors.
Thanks
1 solutions

Answer 211050 by richwmiller(9135) on 2010-04-14 06:59:38 (Show Source):

You can put this solution on YOUR website!
use long division or synthetic division
then you will be able to factor the result.

Finance/292027: could you pls help me to solve this question: A bus leaves a station at 8:00 a.m. and averages 30 mi/h. Another bus leaves the same station following the same route two hours after the first and averages 50 mi/h. When will the second bus catch up to the first?
1 solutions

Answer 211049 by richwmiller(9135) on 2010-04-14 06:57:00 (Show Source):

You can put this solution on YOUR website!
This is a travel word problem and has nothing to do with the category you chose finance.

Systems-of-equations/292047: how to solve using the ELIMINATING METHOD in solving systems of equations.
2x - 3y = 11
THANKS :)
1 solutions

Answer 211048 by richwmiller(9135) on 2010-04-14 06:52:26 (Show Source):

Systems-of-equations/292048: how to solve using the ELIMINATING METHOD in solving systems of equations..
2 + x/7 = y/4
1 solutions

Answer 211047 by richwmiller(9135) on 2010-04-14 06:51:14 (Show Source):

Systems-of-equations/292049: how to solve using the ELIMINATING METHOD in solving systems of equations...
3x + 2y = 2

1 solutions

Answer 211046 by richwmiller(9135) on 2010-04-14 06:50:17 (Show Source):

Systems-of-equations/292046: how to solve using the ELIMINATING METHOD in solving systems of equations
6x - y = 7
1 solutions

Answer 211045 by richwmiller(9135) on 2010-04-14 06:48:37 (Show Source):

Age_Word_Problems/292040: The average of the ages of a man and his daughter is 34 years. If the respective ratio of their ages four years from now is 14:5, what is the daughter's present age?
(1) 12 (2) 18 (3) 10 (4) Cannot be determined (5) None of these

1 solutions

Answer 211044 by richwmiller(9135) on 2010-04-14 06:44:10 (Show Source):

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(m+d)/2=34
(m+4)/(d+4)=14/5
d=16 m=52
daughter is 16 now
(5) none of these
check
56/20=14/5
4*14/4*5=14/5
ok

Miscellaneous_Word_Problems/291948:
1 solutions

Answer 210994 by richwmiller(9135) on 2010-04-13 21:26:59 (Show Source):

Linear_Algebra/290666: Q.1) 1.05=1(power1/n)
1 solutions

Answer 210993 by richwmiller(9135) on 2010-04-13 21:25:51 (Show Source):

Travel_Word_Problems/291925: A car traveled 5 miles in 6 minutes. What was its speed in miles per hour?

1 solutions

Answer 210990 by richwmiller(9135) on 2010-04-13 21:17:59 (Show Source):

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r*t=d
6 minutes=6/60=1/10
r*1/10=5
r/10=5
r=50

Radicals/291933: how would you simplify large radical such as radical:3237
1 solutions

Answer 210989 by richwmiller(9135) on 2010-04-13 21:15:31 (Show Source):

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Do you mean factor or find the square root.
There are only three factors all prime 3,13,83
Otherwise use a calculator.

Quadratic_Equations/291932: solve using the quadratic formula. round your answer to the nearest hundredth.
2x%5E2-4x-3=0

-----here's my try.------
step 1: x=-(-4)±√2^2-4(2)(-3)/2(2)
step 2: x=4±√4+24/4
step 3: x=4±√28/4
i don't know what to do past there. please help me, thank you.
1 solutions

Answer 210985 by richwmiller(9135) on 2010-04-13 21:10:33 (Show Source):

You can put this solution on YOUR website!
You should write out the formula and be more clear and not run things together.
You used 2^2 instead of 4^2
you had a^2-4ac
%28-b%2B-+sqrt%28b%5E2-4%2Aa%2Ac%29%29%2F%282%2Aa%29

%28-b%2B-+sqrt%28b%5E2-4%2Aa%2Ac%29%29%2F%282%2Aa%29

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation ax%5E2%2Bbx%2Bc=0

(in our case 2x%5E2%2B-4x%2B-3+=+0

) has the following solutons:

x%5B12%5D+=+%28b%2B-sqrt%28+b%5E2-4ac+%29%29%2F2%5Ca

For these solutions to exist, the discriminant b%5E2-4ac

should not be a negative number.

First, we need to compute the discriminant b%5E2-4ac

.

Discriminant d=40 is greater than zero. That means that there are two solutions: +x%5B12%5D+=+%28--4%2B-sqrt%28+40+%29%29%2F2%5Ca

x%5B1%5D+=+%28-%28-4%29%2Bsqrt%28+40+%29%29%2F2%5C2+=+2.58113883008419

x%5B2%5D+=+%28-%28-4%29-sqrt%28+40+%29%29%2F2%5C2+=+-0.58113883008419

Quadratic expression 2x%5E2%2B-4x%2B-3

can be factored:
2x%5E2%2B-4x%2B-3+=+2%28x-2.58113883008419%29%2A%28x--0.58113883008419%29

Again, the answer is: 2.58113883008419, -0.58113883008419. Here's your graph:
graph%28+500%2C+500%2C+-10%2C+10%2C+-20%2C+20%2C+2%2Ax%5E2%2B-4%2Ax%2B-3+%29

Angles/291922: A triangle that has angles that measures 45,45, and 90 degrees is a(n)?
1 solutions

Answer 210982 by richwmiller(9135) on 2010-04-13 20:56:40 (Show Source):

You can put this solution on YOUR website!
if two angles are the same then two sides are the same.
What kind of triangle has two sides the same?
if there is a 90 degree angle it is a ? triangle?

Linear_Algebra/291929: What is the answer if you solve each system of equation by substitution?
4y+3x=-3
y=5x-5
1 solutions

Answer 210980 by richwmiller(9135) on 2010-04-13 20:50:21 (Show Source):

You can put this solution on YOUR website!
The method (substitution or elimination) I use should not change the answer.
4*(5x-5)+3x=-3
solve for x
Some website rules you won't like:
You are limited to one problem per submission. [One problem at a time.]
To be sure we understand each other, one means one not two or three or more.
No more than 4 submissions daily. [4 problems a day]
No similar problems. [Different type problems only.]

sets-and-operations/291908: Given the sets U ={0,1,2,3,4,5,...} A= {1,2,3,4,...}, B= {4,8,12,16,...},
C= {2,4,6,8,...}
Determine
B U C
1 solutions

Answer 210978 by richwmiller(9135) on 2010-04-13 20:47:26 (Show Source):

You can put this solution on YOUR website!
B U C is everything in B and everything in C or in both B and C
so join and combine the two sets
B= {4,8,12,16,...},
C= {2,4,6,8,...}
B U C={2,4,6,8,12,16,...}

Length-and-distance/291924: How do you find the length between 2 similar shapes
1 solutions

Answer 210977 by richwmiller(9135) on 2010-04-13 20:42:40 (Show Source):

You can put this solution on YOUR website!
example please

Quadratic_Equations/291921: Please help me solve the equation
b^4+13b^2+36=0
Find all real and imaginery solutions to this problem
1 solutions

Answer 210976 by richwmiller(9135) on 2010-04-13 20:41:32 (Show Source):

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let a=b^2
a^2+13a+36=0
find factors of 36 which add up to 13
1 36
2 18
3 13
4 9
6 6
(a+9)*(a+4)=0
(b^2+9)*(b^2+4)=0
b^2=-9
b^2=-4
b=2i,-2i,3i,-3i

Linear-systems/291903: I purchased a total of 8 music mp3 and movies from iTunes this month. The total purchase price of the movies and music mp3 is $34.92. If I each movie cost 9.99 and each music file cost $0.99, then how many music files and how many movies did I purchase? Please use either the addition (elimination) or substitution method to solve this problem.
1 solutions

Answer 210975 by richwmiller(9135) on 2010-04-13 20:36:35 (Show Source):

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mp3=u
movie =o
u+o=8
99*u+999*o=3492
o=3 u=5

Proportions/291915: I am having trouble with some weird/difficult proportion questions~
6/25 is equal to e/80
e=?

1 solutions

Answer 210972 by richwmiller(9135) on 2010-04-13 20:30:15 (Show Source):

Quadratic_Equations/291913: How do you compute the intercepts of a quadratic function?

1 solutions

Answer 210970 by richwmiller(9135) on 2010-04-13 20:26:23 (Show Source):

You can put this solution on YOUR website!
give an example online

Miscellaneous_Word_Problems/291911: If x = 3i is a root of the polynomial P(x) which has real coefficients, then what other root is guaranteed
1 solutions

Answer 210969 by richwmiller(9135) on 2010-04-13 20:25:13 (Show Source):

You can put this solution on YOUR website!
any zeros (roots) that are either complex(with i) or square roots come in plus and minus pairs.
x=-3i is also a root.

Number-Line/291838: on a number line which numbers are greater?
a. absolute numbers
b. negative numbers
c.positive numbers
d.no numbers
1 solutions

Answer 210966 by richwmiller(9135) on 2010-04-13 20:13:04 (Show Source):

You can put this solution on YOUR website!
c) positive.
see http://www.sosmath.com/algebra/inequalities/ineq03/ineq03.html

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Recent problems solved by 'richwmiller'