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Functions/309595: I AM SUCH AN IDIOT. I NEED HELP WITH EVERYTHING ABOUT ALGEBRA. I DON'T UNDERSTAND ANYTHING. INEVER UNDERSTOOD ANYTHING. HELP ME. 1) x^2-2x-7= sqrt (5) 2) 3/5 = sqrt (9) 3) 56x -18x+ x^2= 17 4) sqrt (9) = sqrt (35) 1 solutions Answer 221488 by checkley77(12569)   on 2010-05-29 18:50:18 (Show Source): You can put this solution on YOUR website! ARE YOU SURE YOU HAVE COPIED THESE PROPLEMS CORRECTLY??? SOME OF THEM DON'T MAKE ANY SENSE (NUMBERS 2 & 4). -------------------------------------------------------- 1) x^2-2x-7= sqrt (5) X^2-2X-7-2.236=0 X^2-2X-9.236=0 USING THE QUADRATIC EQUATION BELOW WE GET: X=(2+-SQRT[-2^2-4*1*-9.236])/2*1 X=(2+-SQRT[4+36.944)/2 X=(2+-SQRT40.944)/2 X=(2+-6.399)/2 X=(2+6.399)/2 X=8.399/2 X=4.199 ANS. X=(2-6.399)/2 X=-4.399/2 X=-2.199 ANS. 2) 3/5 = sqrt (9) 3/5=3 3=5*3 3=15 DOES NOT COMPUTE. 3) 56x -18x+ x^2= 17 38X+X^2-17=0 X^2+38X-17=0 X=(-38+-SQRT[38^2-4*1*-17])/2*1 X=(-38+-SQRT[1,444+68])/2 X=-38+-SQRT1,512)/2 X=(-38+-38.88)/2 X=(-38+38.88)/2 X=.88/2 X=.44 ANS. X=(-38-38.88)/2 X=76.88/2 X=-38.44 ANS. 4) sqrt (9) = sqrt (35) 3=5.91 DOES NOT COMPUTE.

Linear-equations/309598: If the vertical line of a triangle is 24m and the bottom horizontal line is 10m, then what would the missing length be? Help please & thanks 1 solutions Answer 221483 by checkley77(12569)   on 2010-05-29 18:29:09 (Show Source): You can put this solution on YOUR website! IF THE VERTICLE LINE IS ONE OF THE SIDES & IT'S A RIGHT TRIANGLE THEN: 10^2+24^2=C^2 100+576=C^2 C^2=676 C=SQRT676 C=26 m. iF THE VERTICLE ANGLE IS THE MIDDLE HEIGHT OF THE TRIANGLE THEN: 5^2+24^2=C^2 25+576=C^2 C^2=601 C=SQRT601 C=24.5m. ALL OTHER VERTICLE LINES WILL RESULT IN THE THIRD SIDE BEING BETWEEN 24.5M. & 26 m.

Mixture_Word_Problems/309605: A rectangle is 5 times as long as it is wide. If the are is 125 square feet, find its perimeter? 1 solutions Answer 221479 by checkley77(12569)   on 2010-05-29 18:18:49 (Show Source): You can put this solution on YOUR website! L=5W AREA=LW 125=5W*W 125=5W^2 W^2=125/5 W^2=25 W=SQRT25 W=5 ANS. FOR THE WIDTH. L=5*5=25 ANS. FOR THE LENGTH.

test/309608: -49=x -50 1 solutions Answer 221478 by checkley77(12569)   on 2010-05-29 18:16:26 (Show Source): You can put this solution on YOUR website! -49=x -50 x=-49+50 x=1 ANS.

Quadratic_Equations/309616: For the Equation 4X^2-100=0, did I do my work right? 4X^2-100=0 +100 +100 4X^2=100 /4 /4 X^2=25 My teacher said that if it was a prime number or if it had no perfect square you could leave it as it is is this true and is my answer right? Thank you 1 solutions Answer 221477 by checkley77(12569)   on 2010-05-29 18:14:18 (Show Source): You can put this solution on YOUR website! 4X^2-100=0 +100 +100 4X^2=100 /4 /4 X^2=25 YOUR ANSWER IS CORRECT SO FAR BUT: NO YOU CAN'T QUIT NOW BECAUSE 25 IS A PERFECT SQUARE AND THE ANSWER IS: X=SQRT25 X=5 ANS.

Rectangles/309618: what is the diagonal length of a rectangle 10 feet by 12 feet 1 solutions Answer 221476 by checkley77(12569)   on 2010-05-29 18:09:57 (Show Source): You can put this solution on YOUR website! YOU HAVE A RIGHT TRIANGLE WITH SIDES 10,12 & X 10^2+12^2=X^2 100+144=X^2 244=X^2 X^2=244 X=SQRT244 X=15.62 ANS. FOR THE DIAGONAL.

test/309623: The length of a new rectangular field is 7 yards longer than triple the width. If the perimeter of the rectangular playing field is 470 yards what are its dimensions? 1 solutions Answer 221475 by checkley77(12569)   on 2010-05-29 18:06:08 (Show Source): You can put this solution on YOUR website! L=3W+7 P=2L+2W 470=2(3W+7)+2W 470=6W+14+2W 470=8W+14 8X=470-14 8W=456 W=456/8 W=57 YDS. IS THE WIDTH. L=3*57+7=178 YDS. FOR THE LENGTH. PROOF: 470=2*178+2*57 470=356+114 470=470

Triangles/309624: In a isosceles triangle ABC, b is the vertex. the vertex angle measures 3 times the sum of the measures of the other 2 angles. what is the measure of angle b? is it 36 is it 72 is it 108 is it 135 i need help soon as possible 1 solutions Answer 221474 by checkley77(12569)   on 2010-05-29 18:01:53 (Show Source): You can put this solution on YOUR website! b=3*2a b+a+a=180 3*2a+2a=180 6a+2a=180 8a=180 a=180/8 a=22.5 degrees for the other 2 angles. b+2*22.5=180 b+45=180 b=180-45 b=135 degres for the apex angle.

Linear-equations/309625: find the slope, if it exists, on the lines containing points (6,2) and (7,-5) simplify your answer. type and integer or an fraction.type n if there is no slope 1 solutions Answer 221473 by checkley77(12569)   on 2010-05-29 17:53:04 (Show Source): You can put this solution on YOUR website! (6,2) and (7,-5) slope=(y2-y1)/(x2-x1) slope=(-5-2)/(7-6)=-7/1=-7 ans. for the slope. Y=mX+b 2=-7*6+b 2=-42+b b=2+42 b=44 ans. for the Y intercept. y=-7x+44 (graph 300x200 pixels, x from -6 to 10, y from -10 to 50, -7x +44)

Permutations/309629: a popular model of car is being offered in 4 body styles, 3 types of engins, and 5 metal flake paint schemes. how many cars are needed to display all possible option variations? 1 solutions Answer 221472 by checkley77(12569)   on 2010-05-29 17:48:00 (Show Source): You can put this solution on YOUR website! 4*3*5=60 different models are needed.

test/309630: factor the trinomial if possible. if it cannot be factored, write not factorable 4n^2-26n-42 1 solutions Answer 221471 by checkley77(12569)   on 2010-05-29 17:46:24 (Show Source): You can put this solution on YOUR website! 4n^2-26n-42 2(2n^2-13n-21) ans. unless you want to use the quadratic formula. Then n=(1.35 & -.737)

Probability-and-statistics/309636: Please Help. Im stuck on a problem where you must find the number of possible 5-card hands that contain the cards specified. 4 aces and 1 card. This chapter is about combinations. 1 solutions Answer 221470 by checkley77(12569)   on 2010-05-29 17:35:38 (Show Source): You can put this solution on YOUR website! 4/52*3/51*2/50*1/49 24/6,497,400 1/270,725 or.0000036 probability of the 4 aces.

Equations/309639: I need help finding the real solution to this equation. 3v2 + 4v - 1 = 0 1 solutions Answer 221469 by checkley77(12569)   on 2010-05-29 17:25:43 (Show Source): You can put this solution on YOUR website! 3v2 + 4v - 1 = 0 v=(-4+-sqrt[4^2-4*3*-1])/2*3 v=(-4+-sqrt16+12)/6 v=(-4+-sqrt28)/6 v=(-4+-5.29)/6 v=(-4+5.29)6 v=1.29/6 v=.215 ans v=(-4-5.29)/6 v=-9.29/6 v=1.548 ans.

Equations/309643: I need help finding the real solution to this equation. (1/2)x2 + x = 1 1 solutions Answer 221468 by checkley77(12569)   on 2010-05-29 17:19:31 (Show Source): You can put this solution on YOUR website! (1/2)x2 + x = 1 X^2/2+X-1=0 .5X^2+X-1=0 X=(-1+-[SQRT1^2-4*.5*-1])/2*.5 X=(-1+-SQRT[1+2)/1 X=-1+-SQRT3 X=-1+-1.732 X=1+1.732 X=.732 ANS. X=-1-1.732 X=-2.732 ANS.

Equations/309645: I need help finding the real solution to this equation. 3.67x2 + 4.35x - 2.13 = 0 1 solutions Answer 221467 by checkley77(12569)   on 2010-05-29 17:14:11 (Show Source): You can put this solution on YOUR website! 3.67x2 + 4.35x - 2.13 = 0 X=(-4.35+-SQRT[4.35^2-4*3.67*-2.13])/2*3.67 X=(-4.35+-SQRT[18.9225+31.2684])/7.34 X=(-4.35+-SQRT[50.1909)/7.34 X=(-4.35+-7.08455)/7.34 X=(-4.35+7.08455)/7.34 X=2.73455/7.34 X=.3726 ANS. X=(-4.35-7.08455)/7.34 X=-11.43455/7.34 X=-1.5578 ANS.

Geometry_Word_Problems/309646: The Golden Ratio. The anceint greeks thought that the most pleasing shape for a rectangle was one for which the ratio fo the length to the width was approximately 8 to 5, the golden ratio. If the length of a rectangular painting is 2 ft longer thann it's width, then for what demensions would the length and width have the golden ratio? 1 solutions Answer 221466 by checkley77(12569)   on 2010-05-29 17:04:44 (Show Source): You can put this solution on YOUR website! L/W=8/5 8/5=(X+2)/X 8X=5(X+2) 8X=5X+10 8X-5X=10 3X=10 X=10/3 X=3.33 ANS. FOR THE WIDTH. PROOF: 8/5=(3.33+2)/3.33 8/5=5.33/3.33 8*3.33=5*5.33 26.64~26.65

Geometric_formulas/309647: A rectangle is 5 times as lon as it is wide. If the area is 125 square feet, find the perimeter. 1 solutions Answer 221465 by checkley77(12569)   on 2010-05-29 16:59:31 (Show Source): You can put this solution on YOUR website! L=5W LW=125 5W*W-125 5W^2=125 W^2=125/5 W^2=25 W=SQRT25 W=5 ANS. FOR THE WIDTH. L=5*5=25 ANS FOR THE LENGTH. PROOF: 5*25=125 125=125

Equations/309650: I need help to simplify the products and I've exact answers. (3sqrt3 - sqrt2)(sqrt2 + sqrt3) 1 solutions Answer 221464 by checkley77(12569)   on 2010-05-29 16:56:06 (Show Source): You can put this solution on YOUR website! (3sqrt3 - sqrt2) (sqrt2 + sqrt3) ------------------- 3sqrt6-2+3*3-sqrt6 -2+9+2sqrt6 7+2sqrt6 7+2*2.449 7+4.898=11.898 ans.

Equations/309651: I need to simplify the products and give exact answers. (sqrt5 + 2)(sqrt5 - 6) 1 solutions Answer 221463 by checkley77(12569)   on 2010-05-29 16:51:19 (Show Source): You can put this solution on YOUR website! (sqrt5 + 2) (sqrt5 - 6) -------------- 5+2sqrt5-6sqrt5-12 -7-4sqrt5 -7-4*2.236 -7-8.944=-15.944 ans.

Equations/309655: I need to use the product and quotient rules to simplify. √98/9 1 solutions Answer 221462 by checkley77(12569)   on 2010-05-29 16:46:20 (Show Source): You can put this solution on YOUR website! sqrt(98/9) sqrt(49*2)/(3*3) sqrt(7*7*2)/(3*3) 7/3sqrt2 ans.

Rate-of-work-word-problems/309656: It takes Mary 4 hours to clean the house. John can clean the house in 6 hours. Working together, how long does it take to clean the house? What formula do you use to solve this problem? 1 solutions Answer 221461 by checkley77(12569)   on 2010-05-29 16:43:02 (Show Source): You can put this solution on YOUR website! 1/4+1/6=1/x (6+4)/4*6=1/x 10/24=1/x 10x=24 x=24/10 x=2.4 hours working together they can clean the house.

Equations/309658: I need to find the exact answer and simplify it using the rules for radicals. Diagonal of a patio. Find the length of the diagonal of a square patio with an area of 40 square meters. Basic facts: 1. Area of a square = side2 2. Diagonal of a square = √2*side2 1 solutions Answer 221460 by checkley77(12569)   on 2010-05-29 16:40:07 (Show Source): You can put this solution on YOUR website! x^2=40 x=sqrt40 x=6.325 ans. for the length of the sides. s^2+s^2=d^2 2s^2=d^2 2*6.325^2=d^2 2*40=d^2 80=d^2 d=sqrt80 d=8.945 ans. for the diagonal of the square.

Square-cubic-other-roots/309659: what is 2x cubed times 8x to the fifth power divided by 4x to the sixth power 1 solutions Answer 221459 by checkley77(12569)   on 2010-05-29 16:24:23 (Show Source): You can put this solution on YOUR website! 2x^3*8x^5/4x^6 16x^8/4x^6 4x^(8-6) 4x^2 ans.

Equations/309662: I need help finding the real solution to this equation. q2 + 6q - 7 = 0 1 solutions Answer 221458 by checkley77(12569)   on 2010-05-29 16:20:54 (Show Source): You can put this solution on YOUR website! There are 2 real solutions here: q2 + 6q - 7 = 0 (q+7)(q-1)=0 q+7=0 q=-7 ans. q-1=0 q=1 ans. (-7 & 1)

Linear-equations/309664: Determine the slope of the following linear equation. 5x-3y+9=0 1 solutions Answer 221457 by checkley77(12569)   on 2010-05-29 16:15:15 (Show Source): You can put this solution on YOUR website! 5x-3y+9=0 -3y=-5x-9 y=-5x/-3-9/-3 y=-5x/-3+3 The slope=5/3

Geometry_Word_Problems/309665: The perimeter of Triangle ABC is 306 inches. Find the lengths of the sides. My problem is that I am not sure what formula to use. AB=_____ in BC=_______in AC=______in 1 solutions Answer 221456 by checkley77(12569)   on 2010-05-29 16:13:05 (Show Source): You can put this solution on YOUR website! Without any additional information there are an infinite number of solutions to this probnlem. a+b+c=306 102+102+102=306 is one solution. 103+101+102=306 is another solution. 101+101+104=306 is a third solution. 104+104+98=306 is a fourth solution. And there are many many more.

Equations/309532: the permiter of a rectangle is 164m and the length is 7m more than twice the width, could you show me how to find the width and the length? 1 solutions Answer 221386 by checkley77(12569)   on 2010-05-28 20:28:06 (Show Source): You can put this solution on YOUR website! P=2L+2W L=2W+7 164=2(2W+7)+2W 164=4W+14+2W 6W=164-14 6W=150 W=150/6 W=25 ANS. FOR THE WIDTH. L=2*25+7 L=50+7=57 ANS. FOR THE LENGTH. PROOF: 164=2*57=2*25 164=114+50 164=164

Equations/309533: three times as many units of plywood is sold as lumber, the profit on the lumber is $25 per unit and the profit on the plywood is $40 per unit could you show me how to find how many units of lumber and plywood would be produced and sold to make a profit of $14,790 1 solutions Answer 221385 by checkley77(12569)   on 2010-05-28 20:22:48 (Show Source): You can put this solution on YOUR website! 3X*40+X*25=14,790 120X+25X=14,790 145X=14,790 X=14,790/145 X=102 PIECES OF LUMBER WAS SOLD. 3*102=306 PIECES OF PLYWOOD WERE SOLD. 3*102*40+102*25=14,790 12,240+2,550=14,790 14,790=14,790

Coordinate-system/309257: Trying to understand what does the intercept means 1 solutions Answer 221157 by checkley77(12569)   on 2010-05-27 20:34:09 (Show Source): You can put this solution on YOUR website! Graphing has an X & a Y line. Wherever a line or a curve crosses either of these lines, that point is called the intercept.

Polynomials-and-rational-expressions/309163: company A rents copiers for a monthly charge of $250 plus 10 cents per copy. Company B rents copiers for a monthly charge of $500 plus 5 cents per copy. What is the number of copies above which company A's charges are the higher of the two? 1 solutions Answer 221156 by checkley77(12569)   on 2010-05-27 20:31:47 (Show Source): You can put this solution on YOUR website! 250+.10x>500+.05x .10x-.05x>500-250 .05x>250 x>250/.05 x>5,000 copies is the same cost for Co.A & B. More than 5,000 copies Co. a will be more expensive. Proof: Let copies be=5,001 250+.10*5,001>500+500+.05*5,001 250+500.1>500+25.005 750.01>750.005

Polynomials-and-rational-expressions/309226: 9x squareed -18x+81=0 1 solutions Answer 221145 by checkley77(12569)   on 2010-05-27 20:01:21 (Show Source): You can put this solution on YOUR website! 9x^2-18x+81=0 9(x^2-2x+9)=0 x=(2+-sqrt[-2^2-4*1+9])/2*1 x=(2+-sqrt[4-36])/2 x=(2+-sqrt-32)/2 x=(2+--5.657i)/2 x=2/2+-5.657i/2 x=1+-2.828i ans.