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April 16, 2014

Search: Algrebra

Number of results: 191

Algrebra
How do I simplify this: -3(4y)
Monday, October 1, 2007 at 6:36pm by Mackenzie

Algrebra
multiply 4 by -3 and you will get -12y.
Monday, October 1, 2007 at 6:36pm by Amanda

algrebra
show that b is inverse of a a=[-1 1 -3] [2 1 -1] [2 -1 4] b= [0 1 2] [-1 1 -2 ] [-1 0 1] i got ab = to [1 0 0 ] [0 1 0] [0 0 1] and for ba i got [1 0 -4] [0 1 8] [0 0 5] so there is not a inverse is this right
Sunday, April 27, 2008 at 8:30am by sandy

algrebra
I don't understand how you are multiplying your matrices, but I found the inverse of matrix "a" to be -3 1 -2 10 -2 7 4 -1 3 and I got ab to be equal to ba
Sunday, April 27, 2008 at 8:30am by Reiny

Algrebra
Please faCtor. Thank you for your help. a^2 + 4a + 21
Tuesday, December 30, 2008 at 7:35pm by Luke

Algrebra
typo I think, not negative 21?
Tuesday, December 30, 2008 at 7:35pm by Damon

Algrebra
NO it's postive 21
Tuesday, December 30, 2008 at 7:35pm by Luke

Algrebra
Sorry, all you can do is use complex roots then. Look for the roots of a^2 + 4 a + 21 = 0 a = [-4 +/- sqrt (16-84)]/2 a = [-4 +/- sqrt (-68) ]/2 a = [-2 +/- 2 i sqrt_17 ] / 2 a = -1 + i sqrt 17 or a = -1 + i sqrt 17 so (a + 1 + i sqrt 17)(a + 1 - i sqrt 17)
Tuesday, December 30, 2008 at 7:35pm by Damon

Algrebra
Would the answer be no souliton?
Tuesday, December 30, 2008 at 7:35pm by Luke

Algrebra
There is no real number solution.
Tuesday, December 30, 2008 at 7:35pm by Damon

Algrebra
Thank you for your help.
Tuesday, December 30, 2008 at 7:35pm by Luke

Algrebra
I would appreciate your help with this. Thank you Solve each equation and check for extraneous solutions. [SQRT(x - 3)] - 7=0 2[SQRT(w + 4)]=5 [SQRT(x)]=-2
Wednesday, December 31, 2008 at 10:12pm by Sal

Algrebra
SQRT(x - 3) - 7 = 0 Change it to SQRT(x - 3) = 7 and then square both sides, to get x - 3 = 49 x = 52 x must be >3 and sqrt (x-3) must be positive (since is equals 7), so there are no other solutions. Square both sides of the second equation and proceed similarly
Wednesday, December 31, 2008 at 10:12pm by drwls

Algrebra
What would i do with the 2 ?
Wednesday, December 31, 2008 at 10:12pm by Sal

Algrebra
Square it, or first divide both sides of the equation by 2 and then square 5/2 on the right side.
Wednesday, December 31, 2008 at 10:12pm by drwls

Algrebra
How do i factor this? t2-16t+64
Thursday, January 22, 2009 at 7:03pm by Thomas

Algrebra
What is the square root of 64?
Thursday, January 22, 2009 at 7:03pm by Damon

algrebra
If the subway travels and average speed of 45mph and it allows you to get to work at 8:30, when you leave your house at 7:45. One day the subway was having problems and could go 35mph. how early would you have to leave your house to make it to work on time?
Thursday, January 29, 2009 at 9:18pm by Anonymous

algrebra
at the regular speed it took 45 min or 3/4 hour so the distance is 45*3/4 mi or 135/4 miles at a speed of 35 mph it would take 135/4 ÷ 35 hours or .96429 hours which would be 57.9 minutes so just back up that time from his work start of 8:30 BTW, how would he have known that ...
Thursday, January 29, 2009 at 9:18pm by Reiny

algrebra
why did gyo go into a bakery? also what happened when two fruit companies merged?
Tuesday, March 17, 2009 at 5:56pm by Anonymous

algrebra
3y-7+y=25+5y=20-3y
Wednesday, September 2, 2009 at 1:30pm by barbara

algrebra
your problem statement makes no sense to me, with two equal signs.
Wednesday, September 2, 2009 at 1:30pm by bobpursley

algrebra
8x+11x=114
Thursday, September 3, 2009 at 7:36pm by barbara

algrebra
6-9(g+3)+6g
Monday, September 14, 2009 at 11:28pm by jess

algrebra
6-9g-27+6g -3g-21
Monday, September 14, 2009 at 11:28pm by lina

algrebra
And you want to do what?
Monday, September 14, 2009 at 11:28pm by DrBob222

Algrebra
How do you represent each answer as an algebraic expression using the variable mentioned? Represent the cost of "t" feet of lumber that sells for "g" cents a foot....
Monday, September 28, 2009 at 10:11pm by Austin

Algrebra
How do you represent each answer as an algebraic expression using the variable mentioned? A utility company measures gas consumption by the hundred cubic feet, CCF. The company has a three-step rate schedule for gas customers. First, there is a minimum charge of $5.00 per ...
Monday, September 28, 2009 at 10:12pm by Austin

Algrebra
Let's summarize the question: 0 < g ≤ 3 : cost = 5 when g=3 : cost = 5 3 < g ≤ 9 : cost = 5 + 0.75*(g-3) when g=9 : cost = 5 + 0.75*6 = 9.60 9 < g : cost = 9.60 + 0.55*(g-9) Simplify the last expression: For g≥9 CCF: cost = 9.60 + 0.55(g-9) =4.55 + 0.55g
Monday, September 28, 2009 at 10:12pm by MathMate

algrebra
2 similar triangles were drawn in a design.one was 1/4 the size of the other.if the measures of the first were 5,6 and 12 the measure of a larger triangle were is A)10,14 and 24 B)20,28 and 48 c)10,28 and 48 d)14,28 and 48
Tuesday, November 17, 2009 at 8:06pm by yeral

algrebra
It is a real lousy question. What it means is in area, one is 1/4 the size of the other. Since triangle area is proportional to base*height, each of those must be 1/2 the larger (remember 1/2*1/2=1/4) so the sides would be 10,12, and 24
Tuesday, November 17, 2009 at 8:06pm by bobpursley

algrebra
10-3y-7y<30 the solution set is {y/y>= } i dunno how to do this?
Sunday, December 6, 2009 at 3:59pm by help

algrebra
Find the slope, m = (y2-y1)/(x2-x1). Then use the equation y - y1 = m(x - x1) with either point to find the equation of the line.
Sunday, December 20, 2009 at 2:40pm by Marth

algrebra
so what is y= then?
Sunday, December 20, 2009 at 2:40pm by algebra

algrebra
(2,4) and (6,6) what is the equation of the line y=
Sunday, December 20, 2009 at 2:40pm by algebra

algrebra
it also says im supposed tp find an equation of the line containing the given pair of points?
Sunday, December 20, 2009 at 2:40pm by algebra

algrebra
Marth actually told you a way to do it slope = m = (6-4)/(6-2) = 2/4 = 1/2 so y - y1 = m(x - x1) y - 4 = (1/2)(x-2) 2y - 8 = x - 2 2y = x + 6
Sunday, December 20, 2009 at 2:40pm by Damon

algrebra
P=S1 + S2 +S3 for S2
Thursday, January 28, 2010 at 5:29pm by bethany

ALGREBRA
THE FASTEST MOVING INSECT IS THE LARGE TROPICAL COCHROACH. IT SCURRIES AT SPEEDS OF UP TO 2.3 FEET PER SECOND. NOW WRITE AN EQUATION THAT REPRESENTS HOW MANY MILES A ROACH CAN TRAVEL IN 1.5 HOURS
Wednesday, February 3, 2010 at 12:53pm by MARY

ALGREBRA
2.3 feet/sec = 8280 ft/hour , there are 3600 seconds in 1 hour = 1.568 mi/hr , there are 5280 feet in 1 mile so in 1.5 hrs, it went 1.568 x 1.5 or 2.35 miles
Wednesday, February 3, 2010 at 12:53pm by Reiny

algrebra
a drop from 100 to 50 is 50. a rise 50 to 100. will the percent of decrease and the percent of increase be the same.
Sunday, December 20, 2009 at 2:40pm by lisa

Algrebra
Write the equation of the line passing through the given point with the given slope. a) point (3,-2) with slope of m=5/3 Answer: y-(-2)=5/3x-3 b) point (3,9) with slope m=(-2/7) Answer: y-9=-2/7x-3 Correct?
Sunday, March 7, 2010 at 2:33pm by Marco

Algrebra
not quite y-(-2)=(5/3)(x-3) 3(y+2) = 5(x-3) 3y + 6 = 5x - 15 re-arranging ... 5x - 3y = 21 You have the same error in the second one, watch your brackets.
Sunday, March 7, 2010 at 2:33pm by Reiny

Algrebra
I see it thanks...
Sunday, March 7, 2010 at 2:33pm by Marco

algrebra
The function W(d)=0.112d approximates the amount in centimeters of water that results from d cm of snow melting. Find the amount of water that results from snow melting from depths of 20cm,38com, and 62cm.
Friday, March 19, 2010 at 11:49am by PENNY

algrebra
Just take 20, 38, and 62 times 0.112.
Friday, March 19, 2010 at 11:49am by foxycleo

algrebra
Solve by applying the quadratic Formula: all radicals should be simplified as far as possible. Show your work. a^2 -12a + 35 =0
Sunday, April 25, 2010 at 3:01pm by dan

algrebra
a^2 -12a + 35 =(a - 7)(a - 5) a - 7 = 0 a - 5 = 0 Can you find the values for a?
Sunday, April 25, 2010 at 3:01pm by PsyDAG

algrebra
how to solve -6x-4y+3x-y
Monday, August 16, 2010 at 10:54pm by Rebecca

algrebra
Your subject is algebra. Please spell it correctly. You combine like terms, the x's with the x's and y's with y's. -6x+3x=-3x and -4y-y=-5y so your answer is -3x-5y
Monday, August 16, 2010 at 10:54pm by Jen

algrebra
can someone show the steps 6*1/2-4[2-3(4*1/2-3)]=-17 in two step equation in algrebra
Saturday, October 9, 2010 at 3:13pm by jethro

algrebra
6*1/2-4[2-3(4*1/2-3)] = 6*1/2-4[2-3(2-3)] = 6*1/2-4[2-3(-1)] = 6*1/2-4[2+3] = 6*1/2-4[5] = 3 - 20 = -17 of course you could plug 6*1/2-4(2-3(4*1/2-3)) into the Google search window to get http://www.google.com/search?rls=ig&hl=en&source=hp&biw=1662&bih=912&q=6*1%2F2-4%282-3%...
Saturday, October 9, 2010 at 3:13pm by Reiny

algrebra
9 a . 12x -4x =104 9b 8a+3a+4a=12 9c. 7m -3m-6 = 30 9d. 2\3y + 5\3y-8=6
Tuesday, January 4, 2011 at 12:02am by kattie

algrebra
9a. 12X - 4X = 104. 8X = 104, X = 104 / 8 = 13. 9d. 2Y/3 + 5Y/3 - 8 = 6. 7Y/3 = 14, Multiply both sides by 3: 7Y = 42, Y = 42 / 7 = 6. The remaining problems are similar to 9a, and 9d.
Tuesday, January 4, 2011 at 12:02am by Henry

Algrebra
3u-ux/x=6y/x
Thursday, January 6, 2011 at 8:48pm by Maria

algrebra
Suppose the speedometer in your car reads 55.0 mph. What is your speed in m/sec? (1km=0.621 mi)?
Wednesday, January 19, 2011 at 5:34pm by susan

algrebra
1 km = 1000m one hour = 3600 sec 55 * .621 * 1000 * 3600 = ?
Wednesday, January 19, 2011 at 5:34pm by PsyDAG

algrebra
Just for the smell of it They made a perfect pear
Tuesday, March 17, 2009 at 5:56pm by Skier

Algrebra
How do you write the rule for: y=3x+4 for x=8
Monday, February 21, 2011 at 10:33pm by Amanda

Algrebra
y=3x+4 for x=8 Put 8 in place of x in the expression to get y(8)=3(8)+4 = 24+4 = 28 But do make the distinct that y=3x+4 is a rule, while y(8)=28 is a particular value of the rule.
Monday, February 21, 2011 at 10:33pm by MathMate

Algrebra
The points (1,5), (4,5), and (1,0) represent three corners of a rectangle; find the coordinates of the fourth poin
Sunday, February 27, 2011 at 12:37pm by Anonymous

Algrebra
simplify 12n to first power/36n
Thursday, March 10, 2011 at 8:09pm by michael

Algrebra
What goes into 12 that goes into 36? 4 goes into 12 3 times and into 36 9 times. This can be simplified again by 3s. 3 goes into itself 1 time and into 9 3 times. So, your final answer would be 1/3rd.
Thursday, March 10, 2011 at 8:09pm by Julia

Algrebra
How do you insert grouping symbols to make this equation true? 14 divided by (5+2) +8=10 14/7=2+8=10 Please confirm, I really have an issue with Algebra
Sunday, March 20, 2011 at 12:52pm by Jeannie

Algrebra
14/(5+2) + 8 = 10 14/7 + 8 = 10 2 + 8 = 10 Confirmed!
Sunday, March 20, 2011 at 12:52pm by PsyDAG

Algrebra
Please advise if I did this problem correctly Solve the proportion 32/X = 2/3. 32/X = 2/3 32 divided by 2 = 16 11 x 3 = 33 16/33 16 x 2 = 32 33 x 1 = 33
Thursday, March 31, 2011 at 8:05pm by Jeannie

Algrebra
Please confirm if I did the follow problems correctly: A) Find the sum or difference. (5a – 3b) + (2a + 6b)= 7a + 9b Answer: = 7a + 9b B) Let’s work a few of these (FOIL) 1) (x+2) (x+8) = x 10 Answer: x10 2.) (x+5) (x-7) = x + 11 Answer: x + 11 3.) (2x+4) (2x-3) = 4x + 7 ...
Sunday, April 3, 2011 at 6:55pm by Jeannie

Algrebra
Please advise on the following: From 1993 to 2003 the cumulative number N of AIDS cases in thousands can be approximated by, where corresponds to the year 1993. N = -2 x2 + 76x + 430, where x = 0 corresponds to. 1) Show how well the equation approximates the data. 2) Rewrite ...
Monday, July 25, 2011 at 10:27am by Raj

Algrebra
2. N = -2x^2 + 76x + 430. A*C = -2*430 = -860 = -10*86, -2x^2 + 86x-10x + 430, Group the 4 terms into 2 factorable pairs: (-2x^2+86x) + (-10x+430), -2x(x-43) + -10(x-43) = 0, N = (x-43)(-2x-10).
Monday, July 25, 2011 at 10:27am by Henry

algrebra
how do i solve 3x+9-8x+6=62/3
Tuesday, August 23, 2011 at 12:15am by rere

algrebra
3x + 9 - 8x + 6 = 62/3 Multipy both sides with 3 9x + 27 - 24x + 18 = 62 9x - 24x = 62 - 27 - 18 -15x = 17 Divide both sides with -15 x= -17/15
Tuesday, August 23, 2011 at 12:15am by Bosnian

algrebra
(6x^2-xy+y^2)+(-x^2-9xy+6y^2)
Wednesday, January 11, 2012 at 11:12pm by Anonymous

algrebra
just collect like powers 6x^2 - x^2 - xy - 9xy + y^2 + 6y^2 5x^2 - 10xy + 7y^2
Wednesday, January 11, 2012 at 11:12pm by Steve

Algrebra
find the value of r so the line that passesthough each pair of points has the given slope(9,r),(6,3),m=-1/3
Thursday, January 19, 2012 at 9:45pm by Linda

Algrebra
(r-3)/(9-6) = -1/3 3r-9 = -3 3r = 6 r = 2
Thursday, January 19, 2012 at 9:45pm by Reiny

algrebra
16(5/8x+1/16)x=16(7/16+x) I have no idea how to multiple 5/8 by 16
Wednesday, February 8, 2012 at 9:30pm by melissa

algrebra
Multiply the numerators together. Then multiply the denominators together. (5/8) * (16/1) = 80/8 = 10
Wednesday, February 8, 2012 at 9:30pm by Ms. Sue

algrebra
John wants to rent a car. He knows that a friend used XYZ rental agency in the past. His friend paid $65 to drive 50 miles and $74 to drive 80 miles. What is the linear function the agency uses to find the cost?
Monday, February 27, 2012 at 11:40am by tammi

algrebra
they made a perfect pear is not correct on my paper. The letters of the words don't fit in the slots right; I know this sounds gay but if you want to not get a F on it or the teacher to realize you cheat then you'll just have to do it this time.
Tuesday, March 17, 2009 at 5:56pm by Anonymous

Algrebra
I need to find the approximate surface area of a cone with the R=5 and L=6. I thought I figured it out by 3.14(5)(6) which will give me 94.2 I then would take 94.2 +3.14(5)squared and I came up with 172.7, but my answer should be either 20m squared, 98m squared, 118m squared ...
Monday, April 9, 2012 at 2:12pm by Samantha

Algrebra
I think you have written it down wrong. If the diameter of the cone is 5, then R=2.5 and the area is 66.7, or 67.
Monday, April 9, 2012 at 2:12pm by Steve

Algrebra
substitution method 3x + y=12 8x-2y =4
Monday, October 29, 2012 at 4:37pm by Dee

Algrebra
so, substitute: y = 12 - 3x 8x - 2(12-3x) = 4 8x - 24 + 6x = 4 14x = 28 x = 2 so, y = 6
Monday, October 29, 2012 at 4:37pm by Steve

Algrebra
7x+10=59 10-7x+10=59-10 3x+10=49 ??? -3+x=5 3+(-3)+x=5+3 x=8 Is this right Ms.Sue?
Thursday, May 30, 2013 at 7:04pm by cheyenne

Algrebra
Although I am not Ms.Sue: 7x+10=59 7x does not change to a negative. 7x + 10 - 10 = 59 -10 7x = 49 x = 7
Thursday, May 30, 2013 at 7:04pm by PsyDAG

Algrebra
with a tailwind, a bird flew at a ground speed of 3 mi/h. Flying the same path against the same wind, the bird travels at a ground speed of 1.5 mi/h. What is the bird's air speed? What is the wind speed?
Tuesday, January 21, 2014 at 9:59pm by Nathan

Algrebra
bird's air speed ---- x mph wind speed -------- y mph x+y = 3 x-y= 1.5 add them 2x = 4.5 x = 2.25 mph y = 0.75 mph
Tuesday, January 21, 2014 at 9:59pm by Reiny

pre-algrebra
A restaurant offers a buffet dinner at group prices. The buffet costs the restaurant $6 per person. How large a group can the restaurant serve without losing money? P. S. I came up with a group of ten person that they could serve. Please let me know if this is wrong. Thank-you...
Sunday, September 3, 2006 at 8:38pm by Bowier4

Algrebra I
1. Which line is the flattest (or is less steep)? Why? y = 5x -6 y = 5x + 6 y = x - 3 y = x + 3 I thought it would be the last one since it has the smallest slope Well, yes...but both the third and last equations have a slope of 1, and so have the same "steepness" (these lines...
Thursday, October 12, 2006 at 4:30pm by Margie

algrebra 2
it is called completing the square here is the equation 4x^2-4x+1=9 if anyone can help me please do okay i really need ot understand this 4x^2-4x+1=9 Move the numbers to the other side. 4x^2 -4x = 9-1 4x^2 -4x = 8 Now factor out 4 to make things easier. x^2 -x =2 but remember ...
Thursday, November 2, 2006 at 11:19pm by lisa

pre-algrebra
I just do not understand dimensional analysis. Can anybody explain this question: 32 cm = ?m ---- ---- s min Although your dimension labels to not seem to be lined up correctly, it looks like you are being asked to convert 32 cm/s to ? meters/minute. You can do that by ...
Tuesday, March 20, 2007 at 11:06am by Janet

Algrebra II
hi, thanks for reading this I have a question for finding vertical and horizontal asymptotes! as to finding the intercepts, domain, and graphing it all together... like y= 6 over (x+3) I don't quite understand the concepts and things, but if you can give me a hand that'll be ...
Friday, July 13, 2007 at 5:29pm by Kaz18 Tsuruoka

Pre-Algrebra
it's about distributive property simplify the expression 12xy-4xy
Wednesday, November 15, 2006 at 3:37pm by Selecia

Algrebra II
In this word problem, I have to assume that it can be described by a linear function: A photocopying machine purchased new for $4500 loses $900 in value each year. a) Find the value of the machine after 18 months. b) When will the book value be $1200? Thank you for helping me ...
Tuesday, November 11, 2008 at 5:04pm by Maria

Algrebra II
Value=4500- 900/12 * timeinMonths
Tuesday, November 11, 2008 at 5:04pm by bobpursley

algrebra 1
Could you explain in detail how to do the equation (5b4n ) 2 2a6 keep in mind the 4 and 6 are small numbers on the right top corner and the parenthesis are for the numbers on top and bottom. There is a line in between the upper and lower numbers too.
Tuesday, January 6, 2009 at 9:47pm by Andree

algrebra 1
Is this what you are trying to ask? (5b4n)2/(2a6)
Tuesday, January 6, 2009 at 9:47pm by DrBob222

algrebra 1
yes
Tuesday, January 6, 2009 at 9:47pm by Andree

algrebra 1
Yes this is what im asking thanks: Is this what you are trying to ask? (5b4n)2/(2a6)
Tuesday, January 6, 2009 at 9:47pm by Andree

algrebra 1
OK. Now, what do you want to do with the equation? You don't show that it equals anything.
Tuesday, January 6, 2009 at 9:47pm by DrBob222

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