Friday

March 6, 2015

March 6, 2015

Total # Posts: 77

**algebra,help**

I need help with these problems can someone show me how to solve them step by step.If anyone has time i appreciate it. Problem #1 Geometry. The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 4 cm, what are the dimensions (the length ...
*March 25, 2007*

**math,correction**

Find length x in each triangle. Express your answer in simplified radical form. leg 1 = 8 leg 2 = x hypotenuse = 12 MY answer: so x = ã80 I got √80 or appr. 8.94 yes the symbol is a radical. also since the directions say to leave as a radical form then i ...
*March 24, 2007*

**math,correction**

Problem #1 Simplify by combining like terms. xã(18) -3ã(8x^2) My answer: -3xã(2) Problem #2 Simplify each radical expression. (ã(3) + 5)(ã(3) - 3) My answer: -12 see my previous post, don't understand your ...
*March 24, 2007*

**math ,correction**

Problem#1 Directions: Find the distance between each pair of points. (-3,0) and (4,0) My answer: d = 7 Problem #2 Directions:Use the Pythagorean theorem to determine the length of each line segment. Where appropriate, round to the nearest hundredth. Points (1,-1)(3,2) My ...
*March 24, 2007*

**math correction**

Problem#1 Find the length x in each triangle. Express your answer in simplified radical form. Leg 1 = 8 hypotenuse = 10 leg 2 = x My answer is: x = ã27 Problem #2 Geometry. For the home described in exercise 15, if the roof is 7 m from peak to eave and the attic ...
*March 24, 2007*

**math, correction plz**

Can someone correct these for me.PLZ Problem#1 Directions solve equation ãx+4 = 3 My answer: x = 5 Probelm #2 Directions solve equation ã(4x+1) + 3 = 0 My answer x = 2 Problem #3 Directions solve equation ã(2y+7)+4=y My answer y= 1 and y...
*March 24, 2007*

**math.help**

am i correct on this radical (-121) the radicand is negative 121 cannot be evaluated. The square root of -121 is the imaginary number 11i, where "i" is the symbol for the square root of -1. Actually, -11i is also an answer.
*March 23, 2007*

**math,algebra**

I need help if someone can show me the steps to these 2 problems. Problem #1 Use the properties for radicals to simplify each of the following expressions. Assume that all variables represent positive real numbers. radical and inside of the radical theres a fraction that reads...
*March 23, 2007*

**math,correction,plz**

Solve each of the following quadratic equations by completing the square. Problem#22 sect. 10.2 x^2-6x-3=0 My answer I keep getting two different answers : I get these two everytime i do it differently. I get : x= 3 +- radical(12) or x = 3+-2radical(3) Problem #28 sect10.2 2x^...
*March 11, 2007*

**math,correction,plz**

Perform the indicated division. Rationalize the denominator if necessary. Then simplify each radical expression. Problem #54 (6-radical(20))/(2) My answer: 3-radical(5) Problem #50 Find the area of the rectangle shown in the figure. width = radical (3) + radical (5) Length = ...
*March 10, 2007*

**math,correction plz**

Perform the indicated division. Rationalize the denominator if necessary. Then simplify each radical expression. Problem #50 (18+radical(567))/(9) my answer: 2+radical(7) Problem # 52 (-9-radical (108))/(3) My answer: -3-2radical (3) yes on both.
*March 10, 2007*

**math,correction plz**

can someone correct my math...thanks... Perform the indicated multiplication. Then simplify each radical expression. Problem#4 radical(13) times radical (5) My answer: radical (15) Problem #28 radical (7) (2radical(3)+3radical(7)) MY answer: 2radical(21) + 21 No on first one. ...
*March 10, 2007*

**math,correction,plz**

can someone correct these for me plz. Simplify by combining like terms. Problem#32 radical(63) minus 2radical(28) plus 5radical(7) My answer: 4radical(7) Find the perimeter of the triangle shown in the figure. leg...1 = radical (5) + radical (3) leg...2=radical (5) - radical (...
*March 10, 2007*

**math, correction,plz**

can someone correct these for me plz.... Problem#36 Use Property 2 to simplify each of the following radical expressions. Radical (10)/(49) My answer: (radical(2 times 5))/(7) Use the properties for radicals to simplify each of the following expressions. Assume that all ...
*March 10, 2007*

**Math,correction Plz**

Can someone correct these for me please. Problem #68 Science and medicine. Find the time required for an object to fall to the ground from a building that is 1400 ft high. Using the formula t=(1)/(4)radical(s). My answer: 9 minutes and 35 sec. Problem #2 Use Property 1 to ...
*March 10, 2007*

**math,help**

Is it the same thing : fibonacci math and the golden mean? for one i know that this type of math deals with sequences but can someone explian to me briefly the differnces and similarities. http://en.wikipedia.org/wiki/Golden_ratio
*March 10, 2007*

**math,help**

What is missing of the binominal in the following: (radical 3 minus 2) ( ?) = -1
*March 9, 2007*

**math,help**

What are two consecutive integers whose square roots are also consecutives integers? 0 and 1 Thank you for helping me Rom how do you know that its 0 and 1....
*March 9, 2007*

**algebra,math,help**

Use Property 2 to simplify each of the following radical expressions. sqrt (10)/ sqrt(49) My answer: sqrt (10) / (7) THis next one i need help: Use the properties for radicals to simplify each of the following expressions. Assume that all variables represent positive real ...
*March 9, 2007*

**math,correction please..**

(x)/(x-2) - (x+1)/(x) = (8)/(x^2-2x) I keep getting x = 6 can someone show me how you guys are getting x = -10 The lowest commond denominator is x(x-2) x/x *(x)/(x-2) - (x+1)/(x) *(x-2)/(x-2)=(8)/x(x-2) multiplying both sides by the common denominator.. x^2 -(x^2-1x -2)=8 x+2=...
*March 7, 2007*

**math ,correction**

Solve each of the following equations for x. Problem#3 (5)/(x+6) + (2)/(x^2+7x+6) = (3)/(x+1) My answer is: x = 5 Problem #4 (2)/(5)= (x-2)/(20) My answer is: 10=x whoa. good luck. =0
*March 7, 2007*

**math,correction**

Solve each of the following equations for x. Problem#1 (x)/(6) - (x)/(8) MY answer: x = 24 Problem #2 (x)/(x-2) - (x+1)/(x) = (8)/(x^2-2x) My answer is: 6 = x or x = 6 right on the first one. check your math on the second one. i've done it twice and both times got (-10).
*March 7, 2007*

**math,help**

what are the challenges of working with rational expressions i've searched in my math book and online i can't seem to find that answer. Can somoene help me out .. Since this is not my area of expertise, I searched Google under the key words "math rational ...
*March 7, 2007*

**math,correction**

Problem #5 Business and finance. Kevin earned $165 interest for 1 year on an investment of $1500. At the same rate, what amount of interest would be earned by an investment of $2500? My answer is: The amount of interest would be $275 earned by an investment of $2500. Problem #...
*March 7, 2007*

**math,correction**

Problem #3 Science and medicine. Adriana took 2 h longer to drive 360 mi on the first day of a trip than she took to drive 270 mi on the second day. If her speed was the same on both days, what was the driving time each day? my answer: Her driving time was 8h for her first day...
*March 7, 2007*

**math,correction**

Problem #1 Number problem. If one-half of one integer is subtracted from three-fifths of the next consecutive integer, the difference is 3. What are the two integers? My answer is: the two integers are 24 & 25 Problem#2 Science and medicine. A passenger train can travel 325 mi...
*March 7, 2007*

**math, algebra**

what are some challenges about working with rational expressions? Math is a language. Getting it precisely right is a lot easier than describing it in a vague statement in English such as you ask. Is there a chance you can change teachers? If so, I recommend it. THe focus of ...
*March 6, 2007*

**bobpursly & countiblis,math**

I thought that we can solve anything with equations is it always polynomials. Isn't this the same thing as finding the unknown for an equation. As i said in my previous message or am i wrong. Also what about the rational expressions what are some challenges about working ...
*March 5, 2007*

**math,help,bobpursly**

What are some challenges for rational expressions? Also on my previous question about why are polynomials important bobpursly can you expalin it to me towards what you ment about your responce because i still do not undertand...thanks when you get a chance. Polynomials are ...
*March 5, 2007*

**math,correction&help**

Is this right:if it still needs more can someone help me out what else can i say....thanks why are polynomials important? polynomials are important because the are used to determine and solve the unknowns in equations. Many natural processes can be modeled in math equations, ...
*March 4, 2007*

**math,simplifying**

can someone help me if possible simplifying this fraction more (2(x-5))/((x+3)(x-3)(x+1)) It wont simplify any more. okay thank you i just tjought that the bottom i could still simplify it by foiling the first two them multiplying with the last
*March 4, 2007*

**math,help**

Can someone explain to me the reasoning involved in each step when simplifying the fraction 42/56. I had this question wrong in my previous exam...I don't know what i was thinking when answering it......but i like to know what was the actual responce for it....thanks...
*March 4, 2007*

**math,algebra,help**

can someone explain to me why (3)/(5) and (27)/(45) are equivalent fractions. If you simplify 27/45 by dividing the numerator and the denominator by 9 you will get 3/5. 27/25/9 27/25*1/9=3/5 3/25=3/5 5*3=3*25 15=75 75/15=3 If u multiply 3/5 by 9/9 you get 27/45 Oh didn't ...
*March 4, 2007*

**math,mathguru**

you asked me about how did i came up with my answer this is what i did: Write each fraction in simplest form. #18 (-5x^3y^3)/(-20xy^4) = (3X(-5)X(x)X(x)X(x)X(y)X(y)X(y))/(2X2X(-5)X(x)X(y)X(y)X(y)X(y)) = after canceling the common terms top and bottom i am left with = 3 and 2 ...
*March 3, 2007*

**math,correction**

Add or subtract as indicated. Express your result in simplest form. (4y)/(y^2+6y+5) plus (2y)/(y^2-1) My answer is: (6y)/((y+5)(y-1)) ---------------------------------- Geometry. Refer to the triangle in the figure. Find an expression that represents its perimeter It has the ...
*March 2, 2007*

**math,correction**

Geometry. Find the perimeter of the given figure. tHE Figure is a rectangle.It has height (8)/(2x-5) and length (8)/(2x-5) My answer is: (2(x+8))/(2x-5) ------------------------------------ Add or subtract as indicated. Express your result in simplest form. (2)/(5w+10) ...
*March 2, 2007*

**math, correction**

Add or subtract as indicated. Express your result in simplest form. (5)/(4cd) Plus (11)/(4cd) My answer: (4)/(cd) --------------------------------------- Add or subtract as indicated. Express your result in simplest form. (x^2)/(x-3) Subtracted by (9)/(x-3) MY answer is: x + 3...
*March 2, 2007*

**math,correction**

Geometry. The volume of hte box is represented by (x^2+5x+6)(x+5). Find the polynomial that represents the area of hte bottom of the box. the diagram has the height being x+2 My answer is: A=(x+5)(x+3) -------------------------------------- Multiply the following fractions (2x...
*March 2, 2007*

**math,correction**

Write each fraction in simplest form. #18 (-5x^3y^3)/(-20xy^4) my answer is: (3x^2)/(4y) --------------------------------------- Write each expression in simplest form. #24 (4x-28)/(5x-35) = (4(x-7))/(5(x-7)) MY answer= (4)/(5) --------------------------------------- Write ...
*March 2, 2007*

**math,correction**

Multiply. (x+2)(x-2) my answer is: x^2-4 Factor completely. 3(x-2)^2-3(x-2)-6 MY answer: 3(x-4)(x-1) Factor 9x(x-7y)-6(x-7y) My answer is: (9x-6)(x-7y) Divide: (x^3+2x^2+x+12)/(x+3) My anwer is: x^2-x+4 Looks OK!
*March 2, 2007*

**math help**

I need help factoring this out 6a^2-5a+1 okay so now after revising (3a-1)(2a ) the last part i don't know how to actually get -5 and 1 Factoring is not my strong suit. However, by the term "+1", you know that both of the signs in your parenthesis are going to be...
*March 2, 2007*

**math,help**

I did the revision for this one i posted before but i don't seem to find my error... Multiply. (x-8)^2 this is what i did to solve. (x-8)(x-8) then I foiled x^2-8x-8x+64 then i combined like terms x^2-16x+64 correct
*March 2, 2007*

**math,help**

I need help factoring this out 6a^2-5a+1 so far what i have is this: (3a-1)(3a ) If you expand your answer you will not get the original expression, so you are wrong. hint: 3a x ?a = 6a^2
*March 2, 2007*

**math,help**

Can someone show me how step by step how to solve this problem... Rewrite the middle term as the sum of two terms and then factor by grouping. x^2-2x-63 step 1. Find two factors which when multiplied will give you -63 and when added will give you -2 how about -9 and +7?? step ...
*March 2, 2007*

**math,correction**

Factor 9x(x-7y)-6(x-7y) My answer is: (9x-6)(x-7y) well done
*March 2, 2007*

**math**

I don't want to get this wrong for this homework that i have to turn in can someone please relook at it and tell me if it is correct plz.... solve. x^2+3x-18 my answer is x=3 and x=-6 yes.
*March 1, 2007*

**math**

can someone show me the steps for this problem because i got it incorrect in my exam. Solve each of the following quadratic equations. 4x^2=13x+12 what i had put was that x is 3/4 and x is -4 but i just got my result back and it was wrong... 4x^2 -13x _12 = 0 (4x+3) (x -4) = 0...
*March 1, 2007*

**drwls, or other tutors**

does my last postage seem correct for the answers that i got. The one that doesn't have a reply. See previous reply to your post.
*March 1, 2007*

**math,correction**

Can someone correct these for me plz... Problem#6 Factor. x(x-5)-2(x-5) My answer is: (x-2)(x-5) Problem#7 Factor completely. x^2-x-6 My answer is: (x+2)(x-3) Problem#8 Factor completely. 35x^2+40x+5 My answer is: (7x+1)(5x+5) Problem #9 Factor by grouping. x^3-5x^2+2x-10 MY ...
*February 28, 2007*

**math, correction,plz**

Can someone correct these for me..plz... Problem #1 simplify. ((p^5)^4)/(p^6) MY answer: p^14 Problem #2 Write using positive exponents only. b^-6 MY answer: (1)/(b^6) Problem#3 Write 1.81 X 10^-2 in standard notation My answer. 0.0181 Problem #4 Subtract 2x-3x^2+5x^3 from 5x^...
*February 28, 2007*

**bobpursly,**

Is this correct now after i revised it Multiply. 3xy^2(5xy-4x+6y) 3xy^2(5xy)=15x^2y^3 3xy^2(-4x)=-12x^2y^2 3xy^2(6y)=18xy^3 so i get from this 15x^2y^3-12x^2y^2+18xy^3 correct awsome i just thought that the 15x^2y^3-12x^2y^2 should be combine...
*February 28, 2007*

**math,correction**

Can someone correct these for me please.. Find the value of the polynomial 8x – 6 when x = 1 and when x = –1. My answer: So when x = 1 the value of the polynomial is: 2And when x = -1 the value of the polynomial is: -14 Multiply. (x – 8)2 Answer: x^2-16x+16 You ...
*February 28, 2007*

**math,correction**

can somone correct these for me please... Simplify (m^5)^8 My answer.m^40 List the terms and coefficients of 8x^3-4x^2+3 My answer: terms: 3 coefficients: 8,-4 This next one i'm not sure about how to even do it... write 9.03 X 10^-2 in standard notation. standard notation...
*February 28, 2007*

**math,correction**

Can someone correct these for me please... Multiply. (x+2)(x-2) My answer..x^2-4 Write in descending-exponent form, and give the degree 4x^5+x^8-7 My answer: In descending-exponent form would be: x^8+4x^5-7, The degree is 8 Multiply. 3xy^2(5xy-4x+6y) My answer: 13x^2y^2+18xy^3...
*February 28, 2007*

**math , help**

I hope this is correct now.... Write using positive exponents, and simplify if possible (-3x)^-2 a)(1)/(6x^2) b)(9)/(x^2) c)(1)/(9x^2) d) - (9)/(x^2) My answer: c Evaluate 4^-5 My answer is: (1)/(1024) Both look OK!
*February 27, 2007*

**math,correction**

add 5y-4 and 2y^2-8y my answer is: 2y^2-3y-4 classify the following, if possible 7x^2+10xy+y^2 a)not classified b)trinomial c)monomial d)binomial My answer: trinomial Write using positive exponents, and simplify if possible (-3x)^-2 a)(1)/(6x^2) b)(9)/(x^2) c)(1)/(9x^2) d) - (...
*February 27, 2007*

**math correctionplz**

can someone correct these also for me.. Which of the following is not a polynomial? a) 24 b) 4x^3+5x-1 c)2x-(1)/(x) d)3xy^2+xy MY answer is: A Simplify. write your answer with only positive exponents (y^5)/(y^10) Possible answers: a)y^2 b)(1)/(y^2) c)(1)/(y^5) d) y^5 My answer...
*February 27, 2007*

**math,correction ,**

can someone correct these for me please... Remove the parentheses. -(3x+5y) My answer: -3x-5y Find the value of the polynomial -x^2+3x-1 when x=4 My answer: -5 multiply. 10x(-4x-7) my answer: -40x^2-70x all correct. awsome.....thank you...i just want to make sure....
*February 27, 2007*

**math,help,factoring**

i need help i don't know how to do the next step. factor by grouping x^3-3x^2+4x-12 so what i have so far is this =(x^3-3x^2)+(4x-12) =x(x^2-3x)+4(x-3) from here i don't know... and then this one is driving me insane this next one... Rewrite the middle term as the sum ...
*February 27, 2007*

**bobpursly, check please,math**

do you mean like this: 720/(V-30) + 720/(V+30) = 10 Get a common denominator of (v-30)(v+30) then multiplying both sides by that, then (v-30)(v+30)X 720(V+30) + (v-30)(v+30) X 720(V-30)=(v-30)(v+30)X 10(v-30)(v+30) then multily out, and solve for v. 720(v-30)+720(v+30)=10 720v...
*February 25, 2007*

**DRWLS**

cAN YOU LOOK AT THE PREVIOUS POST. i am completely lost towards that equation...how do i even solve it because then i would have to cross multiply or cancel and that will give me zero.
*February 25, 2007*

**help,math**

can some set the equation up for me. Science and medicine. A plane flies 720 mi against a steady 30-mi/h headwind and then returns to the same point with the wind. If the entire trip takes 10 h, what is the plane’s speed in still air? i thought it was this set up but its ...
*February 25, 2007*

**values for k, math,help**

can someone show me the steps to work out this problem that is diving me nuts.. Directions: Find all positive values for k for which each of the following can be factored. x^2+x-k I am completely cluelis towards this problem....i've tried it many different ways.... x= -1/2...
*February 25, 2007*

**factoring,math**

can someone show me how to factor this: i keep getting -6 and 5 but i want to factor: x^2+7x+6 x^2+7x+6 = (x+1)(x+6) This means the roots of x^2+7x+6 = 0 ar -1 and -6 duhhhhh...i was thinking completely wrong..thank you 75 75
*February 25, 2007*

**math, algebra**

can someone explain to me this please.... What is the difference between ax^2+bx+c and ax^2+bx+c=0 One is an expression and the other is an equation. (An equation uses an equals sign.) I hope this helps and is what you were asking. well you got to equal it e.g: 3x-1=5 3x=5+1( ...
*February 24, 2007*

**math,algebra**

Can someone explain this to me plese: to factor a number you.... and then can you explain to me To factor an algebraic expression into prime factors means..... thanks This is how I would complete these two sentences. To factor a number, you break it down into smaller parts. To...
*February 24, 2007*

**math, help**

directions are: Factor each of the following polynomials completely. 14x^2-20x+6 I am at this almost last point but i don't know what to do after or if this is the answer 7x^-10x+3=2(7x-3)(x-1) your final answer is correct I am going w/ Anonymous..... It's correct!
*February 24, 2007*

**math,correction**

can someone check these for me please.... problem#4 Directions: Factor each polynomial completely by factoring out any common factors and then factor by grouping. Do not combine like terms. 3a^3+3ab^2+2a^2b+2b^3 My answer: (a^2+b^2)(3a+2b) you are correct
*February 24, 2007*

**math,correction**

Is this correct or no. I need help in a couple of problems can someone explain them to me. Problem#1 directions: Factor each expression a^2(b-c)-16b^2(b-c) My answer is: (b-c)(a-4b)(a+4b) PROBLEM#2 dIRECTIONS: Find a value for k so that 2x^3-kxy^2 will have the facotors 2x,x-...
*February 24, 2007*

**math,bobpursly,**

4x-2x^2+4x^3 from 4x^3+x-3x^2 4x^3+x-3x^2 -( 4x-2x^2+4x^3) then changing signs and rearranging terms. 4x^3+x-3x^2 -4x^3-4x+2x^2 answer after ADDING the above.. -3x - x^2 so for the answer isn't it the same as what i had -x^2-3x doesnt' x^2 goes first then -3x
*February 23, 2007*

**math, algebra,correction & help**

directions are: write each fraction in simplest form: (-15x^3y^3)/(-20x^1y^4) My answeris: (3x^2)/(4y) THESE TWO NEXT ONES ARE THE ONES THAT I DON'T UNDERSTAND: pROBLEM #1 DIRECTIONS: Write each expression in simplest form. (4x-28)/(5x-35) Problem #2 directions: Write each...
*February 23, 2007*

**bobpursley,math**

about this problem , I figured it out and i did get the answer right except that i had forgotten to make it a negative like this: directions: subtract 4x-2x^2+4x^3 from 4x^3+x-3x^2 -------------------------------- 4x^3-3x^2+x -(4x^3-2x^2+4x) --------------- so then it becomes ...
*February 23, 2007*

**math,help,correction**

directions: subtract 4x-2x^2+4x^3 from 4x^3+x-3x^2 the answer that i came up with was: x^2-3x Is this correct. How did -3x^2 -(-2x^2) become x^2
*February 22, 2007*

**math,correction,plz**

Can someone who has a few minutes could you please correct this for me.thank you. Directions: Find the x-intercepts of y= x^2+x-6 My answer: there are two x-intercepts ( (1-sqrt25)/(2),0) and ((1+sqrt25)/(2),0 x^2+x-6= (x+3)(x-2) how did you get those roots? i am trying to ...
*February 21, 2007*

**algebra,help**

I am clueless about this one...can someone help me with it ...thanks Business and finance. The demand equation for a certain type of printer is given by D = -200p + 35,000 The supply equation is predicted to be S= -6p^2 + 400p – 20,000 Find the equilibrium price. Don'...
*February 20, 2007*

**algebra , help**

Can someone help me set up the equations thanks. Directions: Solve each of the following applications. Give all answers to the nearest thousandth. Problem: Geometry. The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 4 cm, what are the...
*February 20, 2007*

**math help,algebra**

Okay this is what i have to do but i think i am doing something wrong. directions are: Identify the axis of symmetry, create a suitable table of values, and sketch the graph (including the axis of symmetry). The problem is: y = -x^2+6x-2 so i did my table and looks like this x...
*February 20, 2007*

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