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Linear-equations/374758: how do you write -4x-5=3x+8 into slope intercept form and y-intercept form
1 solutions

Answer 266493 by Fombitz(13828) About Me  on 2010-11-21 23:23:43 (Show Source):
You can put this solution on YOUR website!
You can't.
-4x-5=3x%2B8
-7x=13
x=-13%2F7
These equations do not have a slope intercept form.


Numeric_Fractions/374757: how do i solve (-3/8)(13/14)(-12/9)
1 solutions

Answer 266492 by Fombitz(13828) About Me  on 2010-11-21 23:22:48 (Show Source):


Polynomials-and-rational-expressions/374734: Find a polynomial function of lowest degree with rational coefficients that has given numbers as some of its zeros.
2+i,4
1 solutions

Answer 266491 by Fombitz(13828) About Me  on 2010-11-21 23:20:43 (Show Source):
You can put this solution on YOUR website!
If x=2%2Bi is a zero so is x=2-i,
f%28x%29=%28x-4%29%28x-%282%2Bi%29%29%28x-%282-i%29%29
f%28x%29=%28x-4%29%28x%5E2-4x%2B5%29
highlight%28f%28x%29=x%5E3-8x%5E2%2B21x-20%29


Square-cubic-other-roots/374733: Can you please give me the step-by-step t solve this problem?
Simplify:
(square root of a) / [ 1 + (square root of a)]
1 solutions

Answer 266490 by Fombitz(13828) About Me  on 2010-11-21 23:17:24 (Show Source):


Angles/374737: Find the measure of an angle if its measure is 9º less than eight times the measure of its complement.
a) 79º b) 159º c) 11º d) 21º
(If you could please note down how to solve this, it would be much appreciated!)
1 solutions

Answer 266489 by Fombitz(13828) About Me  on 2010-11-21 23:13:46 (Show Source):
You can put this solution on YOUR website!
By defintion,
A%2BC=90
.
.
.
A=8C-9
Substitute,
8C-9%2BC=90
9C=99
highlight%28C=11%29
Then
A=88-9
highlight%28A=79%29


Polynomials-and-rational-expressions/374749: 5a^2-5a
1 solutions

Answer 266488 by Fombitz(13828) About Me  on 2010-11-21 23:12:05 (Show Source):


Exponents/374752: express using negative exponent 1/c
1 solutions

Answer 266487 by Fombitz(13828) About Me  on 2010-11-21 23:11:30 (Show Source):


Equations/374203: Can you please help me solve this equation for zeros?
x^2– 3x – 12 = 0
1 solutions

Answer 266312 by Fombitz(13828) About Me  on 2010-11-20 22:27:01 (Show Source):


Linear-systems/374205: Multiply. Write your answer in lowest terms.
7w/9wy*6y/5w
1 solutions

Answer 266309 by Fombitz(13828) About Me  on 2010-11-20 22:21:28 (Show Source):


Linear-systems/374204: Solve the following equation for y
8/y+2=-3
1 solutions

Answer 266307 by Fombitz(13828) About Me  on 2010-11-20 22:19:00 (Show Source):


logarithm/374143: graph f(x)= (1/4)x and g(x) = log1/4 x in the same rectangular coordinate system.
1 solutions

Answer 266302 by Fombitz(13828) About Me  on 2010-11-20 22:10:37 (Show Source):
You can put this solution on YOUR website!
f%28x%29=x%2F4
.
.
.
graph%28300%2C300%2C-5%2C5%2C-5%2C5%2C0%2Cx%2F4%29
.
.
.
g%28x%29=log%2810%2C%28x%2F4%29%29
.
.
.
graph%28300%2C300%2C-5%2C5%2C-5%2C5%2C0%2Cx%2F4%2Clog%2810%2C%28x%2F4%29%29%29
.
.
.


Linear-systems/374197: Solve the equation for w
2w^2+12w+17=(w+5)^2
If there is more than one solution, separate them with commas.
1 solutions

Answer 266300 by Fombitz(13828) About Me  on 2010-11-20 22:09:02 (Show Source):
You can put this solution on YOUR website!
2w%5E2%2B12w%2B17=%28w%2B5%29%5E2
2w%5E2%2B12w%2B17=w%5E2%2B10w%2B25
w%5E2%2B2w-8=0
%28w%2B4%29%28w-2%29=0
Two solutions:
w%2B4=0
highlight%28w=-4%29
.
.
.
w-2=0
highlight%28w=2%29


Trigonometry-basics/374128: i)- Solve the following equations for 0° < x < 360°.
a) 2sinx cosx = 3 sinx
b) 1 - cosx = √3
1 solutions

Answer 266299 by Fombitz(13828) About Me  on 2010-11-20 22:07:28 (Show Source):
You can put this solution on YOUR website!
a) +++2sin%28x%29%2Acos%28x%29+=+3%2Asin%28x%29
2cos%28x%29=3
cos%28x%29=3%2F2
No solution.
.
..
b) +++1+-+cos%28x%29+=sqrt%283%29
cos%28x%29=1-sqrt%283%29
cos%28x%29=-0.7321
highlight%28x=137.1%29degrees and highlight%28222.9%29degrees


Inequalities/374101: 1/2n+6.2>13n+7
1 solutions

Answer 266297 by Fombitz(13828) About Me  on 2010-11-20 22:03:52 (Show Source):
You can put this solution on YOUR website!
1%2F2n%2B6.2%3E13n%2B7
Multiply both sides by 2.
n%2B12.4%3E26n%2B14
-25n%3E1.6
n%3C1.6%2F25
n%3C6.4%2F100
n%3C0.064


Inverses/374161: simplify
(1/2/0)
1 solutions

Answer 266296 by Fombitz(13828) About Me  on 2010-11-20 22:01:48 (Show Source):
You can put this solution on YOUR website!
Undefined.
Diviion by zero is undefined.


Inverses/374166: Perform the indicated operation and, if possible, simplify. Please show all of your work
(-22/45)/(14/25)
1 solutions

Answer 266295 by Fombitz(13828) About Me  on 2010-11-20 22:01:10 (Show Source):


real-numbers/374195: what is roster notation

1 solutions

Answer 266294 by Fombitz(13828) About Me  on 2010-11-20 21:59:17 (Show Source):
You can put this solution on YOUR website!
Where you list each item.
As an example, the integers greater than 2 and less than 8 are
{3,4,5,6,7}


Linear-systems/374172: Solve each system by addition
x - 2y = -1
-x + 5y = 4
1 solutions

Answer 266293 by Fombitz(13828) About Me  on 2010-11-20 21:57:53 (Show Source):
You can put this solution on YOUR website!
Add the two equations together,
x-2y-x%2B5y=-1%2B4
3y=3
highlight%28y=1%29
Then
x-2=-1
highlight%28x=1%29


Linear-systems/374174: Solve each system by addition
7x - 4y = -3
x + 2y =3
1 solutions

Answer 266292 by Fombitz(13828) About Me  on 2010-11-20 21:56:45 (Show Source):
You can put this solution on YOUR website!

1.7x+-+4y+=+-3
2.+++x+%2B+2y+=3
Multiply eq. 2 by 2 and add to eq.1,
7x-4y%2B2x%2B4y=-3%2B6
9x=3
highlight%28x=1%2F3%29
Then use either equation to solve for y.
1%2F3%2B2y=3
1%2B6y=9
6y=8
highlight%28y=4%2F3%29


Square-cubic-other-roots/374185: How would you evaluate an expression with a mixed-number exponent such as 8^1 1/3?
1 solutions

Answer 266291 by Fombitz(13828) About Me  on 2010-11-20 21:54:01 (Show Source):
You can put this solution on YOUR website!
DUPLICATE See Square-cubic-other-roots/374194:


Square-cubic-other-roots/374194: How would you evaluate an expression with a mixed-number exponent such as 8^1 1/3?
What is the value?
1 solutions

Answer 266290 by Fombitz(13828) About Me  on 2010-11-20 21:53:06 (Show Source):


Angles/374192: Find the measures of two supplementary angles if one angle is 6° less than twice the other
1 solutions

Answer 266289 by Fombitz(13828) About Me  on 2010-11-20 21:51:31 (Show Source):
You can put this solution on YOUR website!
A%2BS=180
A=2S-6
Substituting,
2S-6%2BS=180
3S=186
highlight%28S=62%29degrees
Then
A=2%2862%29-6
A=124-6
highlight%28A=118%29degrees


Rational-functions/374186: Write the equation of the given circle in standard form, and determine the center and radius.
x^2+y^2-2x+6y-15=0
1 solutions

Answer 266288 by Fombitz(13828) About Me  on 2010-11-20 21:49:58 (Show Source):
You can put this solution on YOUR website!
x%5E2%2By%5E2-2x%2B6y-15=0
x%5E2-2x%2By%5E2%2B6y-15=0
%28x%5E2-2x%2B1%29%2B%28y%5E2%2B6y%2B9%29-15=1%2B9
highlight%28%28x-1%29%5E2%2B%28y%2B3%29%5E2=25%29
.
.
.
Center:(1,-3)
Radius:5


Rational-functions/374190: Find an equation of the circle that has its center at (3,-1) and passes through the point (-2,2)
1 solutions

Answer 266286 by Fombitz(13828) About Me  on 2010-11-20 21:48:05 (Show Source):
You can put this solution on YOUR website!
Use the general equation of a circle centered at (h,k) with a radius of R.
%28x-h%29%5E2%2B%28y-k%29%5E2=R%5E2
Substituting,
%28-2-3%29%5E2%2B%282-%28-1%29%29%5E2=R%5E2
%28-5%29%5E2%2B3%5E2=R%5E2
R%5E2=25%2B9
R%5E2=34
.
.
.
highlight%28%28x-3%29%5E2%2B%28y%2B1%29%5E2=34%29


Rational-functions/374189: Find the circumference of the circle whose equation is x^2+y^2-6x+8=0.
1 solutions

Answer 266284 by Fombitz(13828) About Me  on 2010-11-20 21:45:59 (Show Source):
You can put this solution on YOUR website!
Complete the square in x and y to find the equation of the circle.
x%5E2%2By%5E2-6x%2B8=0
x%5E2-6x%2By%5E2%2B8=0
%28x%5E2-6x%2B9%29%2B%28y-0%29%5E2%2B8=9
%28x-3%29%5E2%2B%28y-0%29%5E2=1
The circle has a radius of R=1
C=2%2Api%2AR=2%2Api%2A1=highlight%282%2Api%29


Exponential-and-logarithmic-functions/373932: The bases on each side of the equation cannot be made the same. Therefore, take the logarithm of each side in order to solve the equation.
4^x=19
1 solutions

Answer 266166 by Fombitz(13828) About Me  on 2010-11-20 10:38:38 (Show Source):


Exponential-and-logarithmic-functions/373934: The bases on each side of the equation cannot be made the same. Therefore, take the logarithm of each side in order to solve the equation.
8+10^x=908
1 solutions

Answer 266165 by Fombitz(13828) About Me  on 2010-11-20 10:37:41 (Show Source):


Exponential-and-logarithmic-functions/373939: The bases on each side of the equation cannot be made the same. Therefore, take the logarithm of each side in order to solve the equation.
log2 7
1 solutions

Answer 266164 by Fombitz(13828) About Me  on 2010-11-20 10:36:50 (Show Source):
You can put this solution on YOUR website!
You don't have an equation you only have an expression.
Please repost.


Trigonometry-basics/373949: Can you please help me.
Solve 1+2sinθ= cscθ for θ in an interval ( 0º less than or equal to θ less than or equal to 360º)
Thank you very much!
1 solutions

Answer 266163 by Fombitz(13828) About Me  on 2010-11-20 10:35:21 (Show Source):
You can put this solution on YOUR website!
1%2B2sin%28theta%29=1%2Fsin%28theta%29
sin%28theta%29%2B2%28sin%28theta%29%29%5E2=1
Let u=sin%28theta%29
2u%5E2%2Bu-1=0
%282u-1%29%28u%2B1%29=0
Two solutions:
2u-1=0
2u=1
u=1%2F2
sin%28theta%29=1%2F2
highlight%28theta=30%29º and highlight%28theta=150%29º
.
.
.
u%2B1=0
u=-1
sin%28theta%29=-1
highlight%28theta=270%29º


Equations/373963: Subtract (4a^3+6a^2-5) from the sum of (a^3-4a+3) and (3a-6a^3+2)
1 solutions

Answer 266162 by Fombitz(13828) About Me  on 2010-11-20 10:30:46 (Show Source):
You can put this solution on YOUR website!
First calculate the sum,
S=%28a%5E3-4a%2B3%29%2B+%283a-6a%5E3%2B2%29
S=%28a%5E3-6a%5E3%29%2B%28-4a%2B3a%29%2B%283%2B2%29
S=+-5a%5E3-a%2B5
.
.
.
%28-5a%5E3-a%2B5%29-%284a%5E3%2B6a%5E2-5%29+=-5a%5E3-a%2B5-%284a%5E3%2B6a%5E2-5%29

%28-5a%5E3-a%2B5%29-%284a%5E3%2B6a%5E2-5%29+=highlight%28-5a%5E3-6a%5E2-a%2B10%29


Triangles/373965: the measure of two sides of an eqilateral triangle are 3x+15 and 7x-5.what is the measure of the third side?
1 solutions

Answer 266161 by Fombitz(13828) About Me  on 2010-11-20 10:26:44 (Show Source):
You can put this solution on YOUR website!
Since it's equilateral,
3x%2B15=7x-5
-4x=-20
x=5
.
.
.
3x%2B15=7x-5=3%285%29%2B15=15%2B15=30
s=30
All sides have a length of 30.