Saturday
April 30, 2016

# Posts by Jasmine20

Total # Posts: 331

finacial question
is there anywhere i can find this information or if someone could help me with it... who are the internal and external users of a company's financial statements? For what purposes do they use this information? External users include stockholders and analysts who study the ...
May 8, 2007

math,correction & help
is problem number 1 correct Problem #1 factor completely. x^4 + x^3 -12 MY answer: (x^2-3)(x^2+4) or is this still factorable. Problem #2 i need someone to help me set it up for me to solve. If the sides of a square are decreased by 3cm, the area is decreased by 81 cm^2.What ...
April 22, 2007

math,correction
are these correct now i hope? Problem #1 simplify (m^2)/(8) divided by (m^5)/(16) My answer: (2)/(m^4) Problem #2 multiply (3x-30)/(x^2-4x) times (8x)/(10-x) My answer: (-6)/(x) No. 2/m^3 (3x-30)/(x^2-4x)* (8x)/(10-x) 3*(x-10)*8x /(x-10)(-1)(x)(x-4) x's divid out, the (x-...
April 22, 2007

math,correction
Is this correct now. Problem #1 solve by completing the square. 2x^2+8x+3=0 My answer: x=-2 +/- sqrt (5)/(2) Problem #2 solve by using the quadratic formula 5x^2+3x+1=0 My answer: No solution are defined. You are not completing the square. 2x^2+8x+3=0 x^2 + 4x =- 3/2 now ...
April 22, 2007

math,correction
is this correct? simplify: ((1+(2)/(3))/((2+(1)/(2)) My answer: (2)/(3) assuming that 2/3 and 1/2 are separate fractions, 8/3 x 5/2 40/6 20/3 hmm.. perhaps you need to check your arithmetic. unless i'm wrong, which wouldn't be surprising It is hard to read because the...
April 20, 2007

math,correction
is this correct? factor completely: 9x^2-4 my answer: x is approx. +/- ((sqrt (14)/(3)) nope (3x-2)(3x+2) nope (3x-2)(3x+2)
April 20, 2007

math,correction
Is this correct factor by grouping: x^3-5x^2+2x-10 My answer: (x^2+2)(x-5) *question do i need to go further?* Errm dats almost done exept derz one more step, as you still need to chnage the quadratic equation into 2 linear ones as a Cubic equation has 3 linear functions, What...
April 20, 2007

math,conversition
how do i convert -2.25 into a fraction? OK, if dis is a calculator question, den all u gotta do is follow the steps... 1. Type into calculator -2.25 and press the equals button. 2. Press the Shift button 3. Press the button dat has ab/c And dis should giv you a fraction You ...
April 20, 2007

Math,help
how do i evalute this problem if possible. i will decribe it it has an index of 3 then a squaroot sign then for the radicand (-64) since the cube root of 64 is 4(4 times 4 times 4 = 64).. the (-) part, you just tack on, since a (-) times (+) times (-) equals a (-). so the ...
April 20, 2007

math,help
for this one how do i set it up? IF THE SIDE OF A SQUARE ARE DECREASED BY 3CM, THE AREA IS DECREASED BY 81CM^2. WHAT WERE THE DIMENSIONS OF THE ORIGINAL SQUARE?
April 20, 2007

math,help
how can i factor this out completly x^4+x^3-12 i know that4*-3=-12 but how can i get that middle term x^2*x^2=x^4 first you cannot take out any GCF. so if you decide to use grouping, you can create an equivalent problem: x^4 + x^3 - 6 - 6 then by using grouping (the x-terms ...
April 20, 2007

math,help
Also, can someone set this problem up into equations so i can solve.thanks A plane took 1 hour longer to travel 560 miles on the first portion of a flight than it took to fly 480 miles on the second portion. If the speed was the same for each portion, what was the flying time ...
April 20, 2007

math,help
can someone help me set this word problem up into equations so i can solve. I don't want the answer just if you could help me with how to set it up. thanks The base of ladder is 14feet away from the wall. The top of the ladder is 17feet from the floor.Find the length of ...
April 20, 2007

math,help
I also need help with this one: Add. Express answer in simplest form. ((8)/(s))+ ((8)/(s^2)) (8s + 8)/s^2 = 8(s+1)/s^2 That isn't much simpler than the original form, but sometimes they want single denominators. wouldn't it be : (8s+8)/s^2
April 19, 2007

math,help
I need help with thisone solve: ((x)/(5x+10))+ ((x-3)/(x+2)) = (7)/(5) Let's take that first part: (x)/(5x+10) In the denominator, factor out "5" That leaves that part as: x/(5(x+2)) So now we have: ((x)/5(x+2)) + ((x-3)/(x+2)) = 7/5 We can multiply BOTH sides by...
April 19, 2007

math,correction from previous post
can someone please correct this for me thanks. simplify: 7sqrt(7x) + 5 sqrt (7x) My work: (7+5)sqrt (7x) My answer: 12sqrt (7x) is this correct? yup so i don't have to take out the x from the radicand Nope. 7x + 5x = 12x No matter what "x" is.
April 19, 2007

math,correction
solve: x^2+7x+2=0 My answer: x= (-7 +/- sqrt (41))/(2) good one jasmine
April 19, 2007

math,correction
simplify: sqrt ((7)/(100)) my work: 7 = 1sqrt (7) 100= 10 sqrt (1) (1)/(10) sqrt (7) my answer: (sqrt (7))/(10) Your answer is right but your statements: 7 = 1sqrt (7) 100= 10 sqrt (1) make no sense. how can sqrt(7)=7 ? you are saying 2.6457..=7 and 10sqrt(1) = 100 ---> 10 ...
April 19, 2007

math,correction
simplify: 7sqrt(7x) + 5 sqrt (7x) My work: (7+5)sqrt (7x) My answer: 12sqrt (7x) is this correct? It looks fine. Good work. Thanks for asking.
April 19, 2007

math,correction
the problem reads: evaluate sqrt (-4) if possible. my answer: sqrt (-4)<0 therefore this is not a real number looks correct you cannot take the square root of a negative number in the real number set. Have you learned the imaginary number i = sqrt(-1) ?? if so you can do: ...
April 19, 2007

math,correction
is this correct: solve by using the quadratic formula 5x^2+x=3 what i keep getting is this: (-1 +/- sqrt 61)/(10) or should i reduce the denominator to 5 or is my whole answer incorrect? (-1 +/- sqrt 61)/(10) looks correct. You do not need to reduce it down, it already is. ...
April 19, 2007

math,correction
is this correct: solve: 5(x-2)^2=3 My answer: (10 +/- sqrt 15)/(5) looks like you expanded, then used the formula and you got the right answer properly reduced. I think you are getting this!!! I don't want to confuse you but I would have done the following: (x-2)^2 = 3/5 x...
April 19, 2007

math,help
on one of last week homeworks i got this one wrong can someone explain to me what is the correct format. The demand supply equations for a certain item are given by: D= -5p+40 S=-p^2+30p-8 The correct answer was: \$1.43 how do you get to this answer because i've tried it ...
April 19, 2007

math,help
Is this trinomial a perfect square x^2-6x+9 if the trinomial starts with x^2 and 1/2 of the middle term coefficient squared equals the last term, then it is a perfect square. tell me what you found. i thought it was not a perfect square. because i tried factoring it but it won...
April 19, 2007

math,correction
i have to simplify (a^7b^2)^7 so this is what i ended up with: a^49b^14 should i reduce it more or its fine like this? It is fine.
April 19, 2007

math,algebra
how can i factor this out completely: x^4 + x^2 – 12 well the answer is 74 (x^2 + 4)(x^2 - 3) If only integral values are allowed in factoring, you are done.
April 17, 2007

math,algebra
Can someone set this up in equations so i can solve them i would greatly appreciate it. THanks. Problem #3 The base of a ladder is 14 feet away from the wall. The top of the ladder is 17 feet from the floor. Find the length of the ladder to the nearest thousandth. Problem #4 A...
April 17, 2007

math,algebra
can someone just set up the equations for me for this problem. thanks... Problem #1 A plane took 1 hour longer to travel 560 miles on the first portion of a flight than it took to fly 480 miles on the second portion. If the speed was the same for each portion, what was the ...
April 17, 2007

math,algebra,correction
Is this correct: solve using the quadratic equation: 5x^-4x+1=0 My answer: x= (2)/(5) +/- (1)/(5)i Or should i combine the denominators to look like this: x= (2+/-1)/(5) i I don't like where you show the i I would write the solution as (2 +-i)/5 or 2/5 +-i/5
April 16, 2007

math,help
this is what i have left but i don't know how to finish it. THe length of a rectangle is 1cm more than 4 times its width. if the area of the rectangle is 74cm^2, find the dimensions of the rectangle to the nearest thousandsth. so then: a =Lw A = 74 W= W L=4W+1 FROM ALL ...
April 15, 2007

math,help
The height h in feet of an object after "t" seconds is given by the function h = -16t^2+70t+8 How long will it take the object to hit the ground? round answer to nearest thousandth this is what i have -16t^2+70t+8=0 x = (-70 +/- sqrt (4388))/(-32) from this point on ...
April 15, 2007

math correction
Find the x-intercepts y= x^2-2x-15 answer: x = 2 +/- sqrt 8 I dont get that. Recheck.
April 15, 2007

Problem #1 Solve by completing the square 2x^2-4x-11=0 My answer: x = (2+/-sqrt 26)/(2) Problem #2 Solve by using the quadratic formula x^2-4x-60=0 My answer: x = (2+/-sqrt 16)/(2) You did not do it completeing the square. Please show work. ON the second b^2-4ac is 16+240. How...
April 15, 2007

math
how do i change 3.75 into a fraction simple or improper fraction? you could say 3 and 3/4 (since .75 = 3/4) or you could go from there and convert to improper. basically simplify 375/100 (multiply 3.75/1.00 by 100/100) but it can't be 3 and 3/4 your answer should be 15/4 ...
April 15, 2007

math,help
i need help with this one i've tried it many ways and still can't figure it out because it has the lines going between two solid lines. find the x-intercepts. y = x^2 +5x+2 x intercepts is when y is zero. 0=x^2 +5x+2 using formula 5/2 +- 1/2 sqrt (25-8) that is the ...
April 15, 2007

math,correction
is this correct Find the constant term that should be added to make the following expression a perfect square trinomial x^2 + 7x My answer that i got was 12.25 Take half of seven, square it. 7/2 squared is 49/4. You are right. should i leave it as a decimal or a fraction I ...
April 15, 2007

MATH,correction
IS THIS CORRECT NOW. solve by using the quadratic formula. x^2 = -5-5 My answer: x = (-5 +- SQRT (5))/(2) I dont see any x term, so b is zero. sorry it suppost to read that first -5x-5
April 15, 2007

math,correction
i am really trying is this correct. solve: 5(x-2)^2 = 3 MY ANSWER THAT I GOT IS: X = 2 +- (SQRT (3) )/(5) no. 5(x-2)^2 = 3 (x-2)^2 = 3/5 x-2 = +- sqrt (3/5) x= 2 +- sqrt (3/5) so the whole fraction of 3/5 is inside the sqrt yes
April 15, 2007

i need help,math
okay i am completely lost after reviewing everything my mind is blank cans some one help me with the steps. Solve by completing the square x^2=5x+2 1st: You need to bring the 5x+2 to the other side so you have x^2-5x-2 2nd: Find the values to where when multiplied equal -2 and...
April 15, 2007

math,help
i am stuck with this problem: Problem #12 Solve by using the quadratic formula. 5x^2 + 5x = 3 i am at this step x = (-5 (+/-) sqrt (85))/(10) you are done!
April 15, 2007

math,correction
Is this correct: Problem #13 Solve: 9x^2 = 14 I did the following i divided 9 by both sides then i get this: x^2 = 1.5555555 then i squared both sides and i got the following answer: x = 1.24 I would not have used decimals x^2 = 14/9 x= +/- (√14)/3 Yes, except you ...
April 15, 2007

math,help
how do i find the following: is there a formula for this? Problem #15 Find the constant term that should be added to make the following expression a perfect square trinomial. x^2+7x square a few binomials and see if you can see a pattern e.g. (x+3)^2 = x^2 + 6x + 9 (x-7)^2 = x...
April 15, 2007

Math ,help
how can i simplify this more its for the following problem: Problem #22 solve by using the quadratic formual. 5x^2-4x+1=0 this is where i am but i do not know how to go further. x = (4 (+/-) sqrt (-4))/(10) Problem #23 Solve by completing the square. 4x^2+2x-3=0 i started ...
April 15, 2007

math,help
okay i am getting confuse with the decimals and fractions in order to make a table for the following problem.can someone help me make the tables the problem reads as follows. solve the system. 5x-3y=13 4x-3y=11 Now, i know i have to break them to the form of y=mx+b inorder to ...
April 15, 2007

test,math
so then for -4.33333 would be in a fraction -13/3 IF the 333's are repeating. Yes.
April 15, 2007

math,help
how do you change the following decimal into a fraction. -3.6666666 3 2/3 or 11/3 Memorize .666666 repeating as 2/3 Now if the sixes do not repeat forever, the fraction can be found as 36666666/1000000 which probably can be reduced some... thats right thank you test.
April 15, 2007

math,correction
Is this correct: Solve: (x+5)^2 = 3 I get: x = -5 (+/-) sqrt (3) Problem #2 Solve: 5(x-2)^2 = 3 I get: x = 3 (+/-) ((sqrt(3))/(5) No on the second. YOu have take the sqrt5 slso, so x= 2+- sqrt(3/5) correct on the first.
April 15, 2007

math,help plz
i am lost with this one. Solve the system by graphing. what is the soltion. 2x-2y=10 x+y=3 x=4 This is how the problem is with all thre equations. Help me please..... put it in slope intercept form. put both lines in slope intercept form. 2x-2y=10 x+y=3 y= x-5 y= -x + 3 now, ...
April 15, 2007

math,correction,algebra
is this correct: rewrite the equation 4x-10y = 11 as a function of x. My answer: f(x) = 0.4x-1.1 ok
April 14, 2007

math, algebra
how can i rewrite the following inequality in the form y = mx + b f(x) > x you can't change an inequality into an equality. were you thinking something like f(x) > 1x + 0 ?? no this is how its written in my homework thats why i am confused .
April 14, 2007

math, algebra
How can i solve for this would it best to factor or use the quadratic formula. solve: x^2+2x-8=0 How about for this problem as well: solve : x^2+7x-1 = 0 in the first, can you think of two multipliers of -8 that have a sum of 2?? how about 4 and -2 so it factors! in the ...
April 14, 2007

math,algebra,correction
x = (-5 +/-ã85)/10 do you mean -0.5 or -5 is this right? solve by using the quadratic formula: 5x^2+5x=3 i get: x= -0.5 (+/-)((sqrt(85)/(5)) check up on your proper use of the formula I got x = (-5 +/-√85)/10 which, if you want to separate it into two terms ...
April 14, 2007

math,algebra
is this correct? solve: 9x^2=14 this is what i did: i divide 9 by both sides x^2=1.6 is this first step right Then take the square root of both sides. x^2=1.6 you said to take the squar root of both sides. so is this correct x = 1.264911
April 14, 2007

math,algebra,help
Is this right: Solve: x^2+16x+60=0 this is what i did: i used the quadratic formula and this is what i ended up with. x = -8 +- (sqrt(16))/(2) Which is -8 +-2 Or you could have factored the quadratic (x+10)(x+6) Which is -8 +-2 Or you could have factored the quadratic (x+10)(x+6)
April 14, 2007

math,help,algebra I
I need help can someone help me get unstuck and let me know if i am correct.thank you. solve by completing the square. 4x^2+2x-3=0 this is what i am doing: i used the quadratic equation. so where i am is in this step: x = (-2 (+-) sqrt (-44))/(8) from this point i am stuck: ...
April 14, 2007

math,help.algebra
I am stuck form this point i need help. the problem states: A ball is thrown upward from the roof of a building 100 m tall with an initial velocity of 20 m/s. Use this information for exercises 35 to 38. Science and medicine. When will the ball reach a height of 80 m? h=-5t^2+...
April 4, 2007

math,help
Okay i am still trying to understand how to come up with a radical expressions and their applications, and apply to your daily life. I need more examples if any can help me out .... Is there a way of modeling it if i wanted to use a house for instance i just don't know how...
April 3, 2007

TO THE WEBSITE
i AM REPLYING BACK TO EVERYONE AND TO THE QUESTION OF ANOTHER FELLOW STUDENT ABOUT THIS WEBSITE. THE FOLLOWING: Let me just say WOW.To everyone and all us students are extra lucky to actually have help from each and everyone of you than not knowing what to do with assingments ...
April 2, 2007

algebra,math
My qustion is for the following the problem reads as follows (x-1)^2 = 7 x-1=+- sqrt 7 x= 1+- sqrt 7 the method they use was factoring in order to simplify the equation to make it easier is this correc? x^2-9x-4=6 x^2-9x-10=0 (x-10)(x+1)=0 What method did they use here I think...
April 2, 2007

math , question
Can someone give me an example of how might anyone apply radical expressions and their applications to the daily life of themselves. Well square root of 25 is 5 now A^2 + B^2 = C^2 We need to see if a box is square. So we measure down one side 3' the the other 4'. Now ...
April 1, 2007

math
A roof rises 9.75 ft over a horizontal distance of 15.84ft. What is the slope of the roof to the nearest hundredth? I am not sure if i am using the right fomula. i used the slope rise/run therefore i got : 0.6155303 and when rounded to the hundreadths place i get 0.62 is the ...
April 1, 2007

math, algebra
the problem reads: Write the equation of the line which passes through the point (2,1) and is parallel to another line with equation y = (5)/(2) x + 6 the answer i get is the following is this correct though y = (5)/(2) x - 4 Since your new line is parallel to y=(5/2)x + 6 it ...
March 31, 2007

math
I forgot how to change a decimal to a fraction. i need to change to a fraction the following -2.5 -2 and 5/10 or -25/10 = -5/2 thank you ...and i have to say duhhh to me.
March 31, 2007

math,help
can someone help me plz...last problem simplify (7 + radical (5))(7- radical (5)) for this one i have no idea (a+b)*(a-b)= a^2 - b^2 memorize that, it is the factors of the difference of squares. In this case, a=7, b= sqrt5 so, it simplifies to 49-5=44 So , i don't always ...
March 29, 2007

math,correction
Can somoene helpme plz... Simplify radical 7 * radical 14 wouldn't it be radical (7*14) = radical (98) = 7radical (14) = 7 radical (2) The result is right, you erred on the next to last line. So how do i show that step that i am wrong in...
March 29, 2007

math,correction
Can someone help me with these...plz Simplify 2radical (12) + 4 radical (27) if i simplify radical (12) i get 2radical (3) then if i simplify radical (27) i get 3radical (3). so now i don't know if i'm doing this correctly or how to set it up... 2 sqrt 12 + 4 sqrt 27 4...
March 29, 2007

math,correction
Problem 48 A garden area is 30ft long and 20ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400ft ^2, what is the width of the path? My answer: 2 radical (2)i your answer is correct.. you are very good at this stuff. your gonna be an ...
March 28, 2007

math,correction
Problem 10 use the quadratic formula to solve each of the following quadratic equations. 2x^2-5x = 3 My answer: solutions are 3 and - (1)/(2) Problem 16 3x^2-2x+1=0 My answer: (2+- radical (-8))/(6)
March 28, 2007

math,correction
Problem 22 Solve each quadratic equation by completeling the square. x^2 -6x-3 = 0 MY answer: x = 3 +- 2 radical (3) Problem 28 2x^2+10x+11=0 My answer: x = -2.5 +- 0.5 radical (3) Problem 38 Find two consecutive positive integers such that the sum of their square is 85. My ...
March 28, 2007

math,correction
Solve for x. Problem #22 25x^2 = 13 My answer: x = + - radical (13)/(5) Problem #32 2 (x - 5 )^2 = 3 My answer: x = 5 +- radical (3)/(2) Problem #42 Solve for x x^2+4x+4=7 (hint factor the left-hand side) My answer: x = -2 +- radical (7)
March 28, 2007

math,help,algebra
Can someone show me how to solve these types of problems. i have two that are driving me nuts.as of now. Problem #1 Simplify: 2radical(12) + 4 radical (27) Problem #2 evaluate if possible the following i am going to describe it in the index it has a 3 then a radical and for ...
March 28, 2007

math,algebra,correction
the direction say to calculate to approximate radical(22) to the nearest hundredth. Using the calculator. so i get this: 4.6904157 so if i round to the nearest hundredth would it then be4.69 only how do you write and equation for this condition: center (8,-9), passes through (...
March 27, 2007

MATH,HELP
Including yourself, you have an 11-man squad prepared to build fortifications for hte next six hours. It is 98-degrees in the shade. You have directed each soldier to drink one quart of water per hour duing this period. Each individual has two 1-quart canteens full of water. ...
March 26, 2007

math
can someone help me set this up so i can solve. Problem #3 the posted speed limit for trucks along national route 3 is 35 MPH. how many kilometers will a convoy cover after 3.7 hours on the road traveling at the posted Problem # 5 IF the formula to figure volume for a cubic ...
March 26, 2007

math , help,algebra
i am up to this point in my problem but i don't know what to do next with it can someone show me. Directions: Simplify by combining like terms x radical(18) minus 3radical(8x^2) these are the steps that i've done so far. = x radical (2*9) -3radical (2*4*x^2) = x ...
March 25, 2007

math, help
For the following set, which number has the largest absolute value? 4,-1,12,-20,19,0 Possible Answer of choice: A)0 B)19 C)-20 D)-1 wouldn't it be postive 20 but its not within the choices. What is the absolute value of -20? Absolute value is the distance to 0 on a number ...
February 13, 2007

writeacher
because in the previous message about the pemdas it is parenthesis,exponents,multiplication,division,addition,subtraction therefore how that little part that looks like this 12 divided by 2*2 it would be multiplication first then SORRY THEN DIVISION SO THAT MEANS OVERALL IT IS...
February 13, 2007

math,correction
can you check if how i solved it to show that my answer is no is correct. Is -4 a solution to the equation 7x-5+3x=6+x-10 This is what i did: 7(-4)-5+3(-4)=6+(-4)-10 -28-5-12=2-10 -45=-8 so the answer is no -4 is not the solution to the equation. Yes this is fine yes this is fine
February 13, 2007

math, correction
Find the LCM for 4 and 20 My answer is: LCM IS 20 Your answer is right
February 13, 2007

math,help
can some one help me set this up into eqautions to be solved please. One number is 6 more than another. If the sum of the smaller number and 3 times the larger number is 34, find the two numbers. x=10 y=4 Those are the answers but how do you get to them. 3 liters= mL Wouldn&#...
February 13, 2007

math,correction,plz
Evaluate (15-5)/[((12)/(2*2))-2] my answer that i keep getting is 1 am i even correct or completely wrong The ans is 10 see i had that for the answer but when i revised the rule for order of operations. it says to divide first then multiply left to right and thats whats making...
February 13, 2007

drwls, is this correct,math
drawls this is from the previous post is this correct. solve the system by subtraction. 5x-3y=13 4x-3y=11 equation#2 woudl be 4x-3y=11 -3y = -4x+11 y = (4)/(3) x - (11)/(3) so now i substitute it to equation #1 5x - 3((4)/(3)x - (11)/(3)= 13 5x - 4 x +11 = 13 1x + 11 = 13 1x...
February 13, 2007

math,help!!!!
How do i do thois problem?Please help. Problem #1 solve the system by subtraction. 5x-3y=13 4x-3y=11 Subtract the lower equation's left and right terms from the upper equation's corresponding terms. The first step will get you this: x = 2 Now that you know x, use ...
February 13, 2007

math, correction
Problem #1 Directions: Find the GCF for 14 and 21. My answer is: 7 Problem #2 Directions: List all the prime numbers between 25 and 60. My answer: 29,31,37,41,43,47,53,59 41 what do you mean by saying 41? I MEAN THAT'S 41 AND THAT IS SUPER -DUPER EASY, GOT IT LITTLE DUMB GIRL
February 12, 2007

math, correction
am i also correct for this one. directions: list all the factors of 45. my answer: 1,3,5,9,15,45 yes
February 12, 2007

math, correction
can someone help me correct this Directions: Dtermine which two equations represent perpendicular lines. options are: A) y = 2x-4 b) y = (1)/(3) x + 4 c) y= - (1)/(2)x +4 d) y = (1)/(3)x - 4 wouldn't it be a and c . Because b and d have the dame slope which are parallel ...
February 12, 2007

math,algebra
Can someone help me put this into equations where i can solve them thanks. Problem #1 Allen bought 20 stamps at the post office in 37cents and 20cents denominations. If the total cost of the stamps was \$7.06, how many 37cents stamps did Allen buy? Problem #2 An 800g solution ...
February 11, 2007

math,help!!!!!
Let A be a 2*3 coefficient matrix ;A a)If the system Ax=b is consistent is the solution unique? why or why not? explain b) how many pivots must A have to gurantee that Ax=b has a solution for every vector b in IR^2? c) can the columns be linearly independent? 4 5-1=4
February 11, 2007

math,help
how would i do about this problem can someone explain it to me or show me because i keep getting weird answers with an e at the end. It makes no sence. This question is: The length of human pregnancies from conception to birth varies according to a distrubition that is ...
February 11, 2007

countiblis,math
How did you get: x = 2; y = -1 for Directions: Sove the system by addition 5x-3y=13 4x-3y=11 for this type of problem there is no shading correct. or am i wrong 5x-3y=13 4x-3y=11 If you subtract the two equations you get: 5x-3y - (4x-3y) = 13 - 11 The y's on the left hand ...
February 10, 2007

math, help
What are two solutions for 3x-y=0 am i correct on this inorder to graph (0,0) and (2,6) Because the line goes through (0,0) so how do i get two solutions from that line? You can get two solutions from that line because the first solution (0,0) is from the start of the axons x,...
February 10, 2007

math,help
can someone explain to me also how to do addition with equations. Solve the system by addition 5x-3y=13 4x-3y=11 its easy try properly It's not easy "It's not easy" Then how come I found the answer: x = 2; y = -1, in just five seconds by just looking at the ...
February 10, 2007

math, help
can someone show me how to do this one i have plenty of them so can you show me step by step when someone gets a chance. Thank you. Solve the system by graphing x+y=3 x+y=-1 What I would do is to put the equations in slope intercept form: y= -x + 3 y= -x -1 Then graph the ...
February 10, 2007

math,help
How do even solve this one sum of two numbers is 32. their difference is 6. what are the numbers? x-y=6 x+y=32 add the equations... 2x=38 and solve.
February 10, 2007

correct , math
Directions: Facotor each of the following polynomials completely. 14x ^2 -20x + 6 the answer that i got was: 7x^2-10x+3= (7x-3)(x-1) not quite. You left out the two, you just cant throw it away. 2(7x-3)(x-1) can you show me please the steps I am getting confused.
February 9, 2007

MATH,HELP
Can someone show me how to even do this problem. Find all positive values for K for which each of the following can be factored. x^2 + x - k News flash: It can be factored with any term (although the roots may not be real roots). Now if you mean factored with real values for ...
February 9, 2007

correction of math
given f(x) = 5x - 3, find f (-1). My answer: f(-1)= 5(-1)-3 = -5-3 = -8 correct
February 8, 2007

correction of math
rewrite the equation 2x-3y= -6 as a function of x. My answer. f (x) = (2)/(3) x + 2 No. 2x=3y - 6 divide by two. x=3/2 y -2 hold on i was looking it over. wouldn't it be: 2x-3y=-6 would actually be: -3y=-2x-6 y= 2/3x+2 because you said that it would be x=3/2y-2 but how can...
February 8, 2007

correction of math
can someone correct this for me please. Directions: Solve the system by substitution. x + y = 12 y = 2x this is what i did: in the first equation i substituted y for what i have in the second equation so now it looks like this: x +2x = 12 3x = 12 x = 4 now i substitute my x ...
February 8, 2007

Math,correction
direction state : solve each system by addition. if a unique solution does not exist, state whether the system is consistent or dependent. NOw the problem looks like this: 2x+3y=1 5x+3y=16 the answer that I got was this: for variable x = 5 y = -3 which is the same as (5,-3) ...
February 7, 2007

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