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# Recent problems solved by 'checkley77'

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 Equations/154742: what's the best way to work 5-x-x=-1 1 solutions Answer 113942 by checkley77(12569)   on 2008-09-02 19:42:43 (Show Source): You can put this solution on YOUR website! 5-x-x=-1 combine the x,s & the 5 & -1 -2x=-1-5 -2x=-6 now divide by -2 x=-6/-2 x=3 answer. proof: 5-3-3=-1 5-6=-1 -1=-1
 Mixture_Word_Problems/154721: This question is from textbook college algebra ninth edition How many pounds of extra-lean-hamburger that is 7% fat must be mixed with 30 pounds of hamburger that is 15% fat to obtain a mixture that is 10% fat?1 solutions Answer 113940 by checkley77(12569)   on 2008-09-02 19:39:37 (Show Source): You can put this solution on YOUR website!.07x+.15*30=.10(30+x) .07x+4.5=3+.10x .07x-.10x=3-4.5 -.03x=-1.5 x=-1.5/-.03 x=50 pounds of 7% hamburger. proof: .07*50+.15*30=.10(30+50) 3.5+4.5=.10*80 8=8
 Functions/154722: The problem is 1.2x-3.5=x+1.7 the other is 6-7(m-3)+1=01 solutions Answer 113938 by checkley77(12569)   on 2008-09-02 19:26:31 (Show Source): You can put this solution on YOUR website!1.2x-3.5=x+1.7 1.2x-x=1.7+3.5 .2x=5.2 x=5.2/.2 x=26 answer. ------------------------------ 6-7(m-3)+1=0 6-7m+21+1=0 -7m=-6-21-1 -7m=-28 m=-28/-7 m=4 answer.
 Equations/154726: I don't know how to solve this equation. Use factoring to solve each equation for real values of the variable. Please help me solve this problem: 6p + p^1/2 - 1 = 01 solutions Answer 113936 by checkley77(12569)   on 2008-09-02 19:21:59 (Show Source): You can put this solution on YOUR website!6p+p^1/2-1=0 (3SQRTP-1)(2SQRTP+1)=0 3SQRTP-1=0 3SQRTP=1 [SQUARE BOTH SIDES.] 9P=1 P=1/9 ANSWER. 2SQRTP+1=0 2SQRTP=-1 [SQUARE BOTH SIDES] 4P=1 P=1/4 ANSWER.
 Equations/154731: fraction 4/x = 5/7 solve and check work 1 solutions Answer 113933 by checkley77(12569)   on 2008-09-02 19:14:47 (Show Source): You can put this solution on YOUR website!4/x = 5/7 CROSS MULTIPLY 5X=4*7 5X=28 X=28/5 ANSWER. PROOF: 4/(28/5)=5/7 5(28/5)=4*7 28=28
 Equations/154723: Not sure on how to solve this. Use factoring to solve each equation for real values of the variable. Please help me solve this problem: x - 13x^1/2 + 12 = 01 solutions Answer 113932 by checkley77(12569)   on 2008-09-02 19:12:28 (Show Source): You can put this solution on YOUR website!x-13x^1/2+12=0 (SQRTX-12)(SQRTX-1)=0 SQRTX=12 SQUARE BOTH SIDES. X=12^2 X=144 ANSWER. SQRTX-1=0 SQRTX=1 SQUARE BOTH SIDES. X=1^2 X=1 ANSWER.
 Exponents-negative-and-fractional/154724: This question is from textbook Prentice Hall Mathmatics Could you please help me with this question? Is the value of this question positive or negative? -2^2 Thank You1 solutions Answer 113926 by checkley77(12569)   on 2008-09-02 19:02:27 (Show Source): You can put this solution on YOUR website!-2^2=4 -(2)^2=-4
 Distributive-associative-commutative-properties/154718: please help me solve this equation 1 solutions Answer 113925 by checkley77(12569)   on 2008-09-02 19:00:57 (Show Source): You can put this solution on YOUR website!27x^2-117x-90 9(3X^2-13X-10) 9(3X+2)(X-5)
 Rate-of-work-word-problems/154708: Arthur can arrange a number of books in the bookshelf in x hours. Charlie can do the same job in y hours. If they work together,they will finish the same job in 6 hours. Arthur's rate is one-third of Charlie's. Find the number of hours each can do the job alone?1 solutions Answer 113924 by checkley77(12569)   on 2008-09-02 18:56:59 (Show Source): You can put this solution on YOUR website!XY/(X+Y)=6 Y=X/3 (X*X/3)/(X+X/3)=6 X^2/3=6(3X+X)/3 X^2/3=2*4X X^2=3*8X X^2=24X X^2-24X=0 X(X-24)=0 X=24 HOURS FOR ARTHUR WORKING ALONE. 24/3=8 HOURS FOR CHARLIE WORKING ALONE. PROOF: 24*8/(24+8)=6 192/32=6 6=6
 Exponents-negative-and-fractional/154657: This question is from textbook Algebra structure and method book 1 can you please help me solve this problem and show all work using the 5-step method: (((A sailboat travels 20 miles downstream in 3 hours. It returns in 4 hours. Find the speed of the sailboat in still water and the rate of the current.)))1 solutions Answer 113919 by checkley77(12569)   on 2008-09-02 18:42:37 (Show Source): You can put this solution on YOUR website!DISTANCE=RATE*TIME OR DISTANCE/TIME=RATE 20/3=6.666 WITH THE CURRENT. 20/4=5 AGAINST THE CURRENT. (6.666-5)/2=1.666/2=.833MPH IS THE SPEED OF THE CURRENT. PROOF: 6.666-.833=5.833 SPEED OF THE SAIL BOAT. 5+.833=5.833 DITTO.
 Graphs/154667: Why is the line x=4 a verticle line. 1 solutions Answer 113916 by checkley77(12569)   on 2008-09-02 18:33:15 (Show Source): You can put this solution on YOUR website!X=4 MEANS NO MATTER WHAT Y VALUE IS GIVEN THE CORRESPONDING X VALUE IS 4. THE BEST WAY TO VISUALIZE THIS IS THE GRAPH X=4 AS A VERTICLE LINE THROUGH THE POINT (4,0).
 real-numbers/154696: This question is from textbook Algebra1/2 An Incremental Development How do you: Write the six-digit number that has the digit 4 in the thousands' place, with each of the remaining digits being 6. Write the seven-digit number that has the digit 3 in the millions' place and the digit 7 in the hundrends' place, with each of the remaining digits being 6. A number has eight digits. Every digit is 9 except the ten millions' digit, which is 3, the ten-thousands' digit, which is 5, and the units' digit, which is 2. Use the digits to write the number. Use the words to write each number: 90,807,060 32,000,000,652 3,250,009,111 6,040,000 99,019,9001 solutions Answer 113912 by checkley77(12569)   on 2008-09-02 18:27:18 (Show Source): You can put this solution on YOUR website!664,666 3,666,766 39,959,992 ------------------------------ 90,807,060 NINETY MILLION EIGHT HUNDRED & SEVEN THOUSAND AND SIXTY 32,000,000,652 THIRTY TWO MILLION SIX HUNDRED FIFTY TWO 3,250,009,111 THREE BILLION TWO HUNDRED FIFTY MILLION NINE THOUSAND ONE HUNDRED ELEVEN 6,040,000 SIX MILLION FORTY THOUSAND 99,019,900 NINETY NINE MILLION NINETEEN THOUSAND NINE HUNDRED
 real-numbers/154695: This question is from textbook Algebra1/2 An Incremental Development How do you: Write the six-digit number that has the digit 4 in the thousands' place, with each of the remaining digits being 6. Write the seven-digit number that has the digit 3 in the millions' place and the digit 7 in the hundrends' place, with each of the remaining digits being 6. A number has eight digits. Every digit is 9 except the ten millions' digit, which is 3, the ten-thousands' digit, which is 5, and the units' digit, which is 2. Use the digits to write the number. Use the words to write each number: 90,807,060 32,000,000,652 3,250,009,111 6,040,000 99,019,9001 solutions Answer 113911 by checkley77(12569)   on 2008-09-02 18:25:35 (Show Source): You can put this solution on YOUR website!664,666 3,666,766 39,959,992 ------------------------------ 90,807,060 NINETY MILLION EIGHT HUNDRED & SEVEN THOUSAND AND SIXTY 32,000,000,652 THIRTY TWO MILLION SIX HUNDRED FIFTY TWO 3,250,009,111 THREE BILLION TWO HUNDRED FIFTY MILLION NINE THOUSAND ONE HUNDRED ELEVEN 6,040,000 SIX MILLION FORTY THOUSAND 99,019,900 NINETY NINE MILLION NINETEEN THOUSAND NINE HUNDRED
 Radicals/154699: 3 square root sign 64x^7 divided by 3 square root sign 4x1 solutions Answer 113908 by checkley77(12569)   on 2008-09-02 18:14:27 (Show Source): You can put this solution on YOUR website![HOPE THESE EXPLANATIONS HELP.] 3SQRT(64X^7)/3SQRT(4X) CANCEL OUT THE 3's in the numerator & denominator. Factor all squares under the sqrts. (64=8*8, x^7=x^3*x^3*x^1,4=2*2) SQRT(8*8*X^3*X^3*X)/SQRT(2*2*X) Extract the square roots from under the square root sign. (8, x^3 & 2) 8X^3SQRTX/2SQRTX DIVIDE THE NUMERATOR & DENOMINATOR BY 2 & CANCEL OUT THE SQRTX TERMS. 4X^3 ANSWER.
 Coordinate-system/154607: When you are plotting coordinates on a graph do you plot the negative numbers first?1 solutions Answer 113876 by checkley77(12569)   on 2008-09-02 11:01:04 (Show Source): You can put this solution on YOUR website!Makes no difference which points are plotted first.
 decimal-numbers/154630: Find a pattern.Write a rule. Use your rules to find the missing numbers in the pattern. Problem:2.3,2.5,2.4,2.6,2.5,__,2.6,2.8,__1 solutions Answer 113875 by checkley77(12569)   on 2008-09-02 10:59:16 (Show Source): You can put this solution on YOUR website!pattern=(+.2),(-.1) 2.3,2.5,2.4,2.6,2.5,2.7,2.6,2.8,2.7
 Inverses/154634: could you please help me solve this problem and detail it. solve for x. present answer in decimal form. -2.2+1.3=-3.4x-2.31 solutions Answer 113874 by checkley77(12569)   on 2008-09-02 10:55:49 (Show Source): You can put this solution on YOUR website!-2.2+1.3=-3.4x-2.3 -.9+2.3=-3.4x 1.4=-3.4x x=1.4/-3.4 x=-.4118 answer.
 Exponential-and-logarithmic-functions/154479: Hi, Can you please help me plot the graph of : It is suppose to be a linear equation in one variable 2x+3=4 I plotted it but I am not sure since I don't know how to graph. Thank you, Mark1 solutions Answer 113812 by checkley77(12569)   on 2008-09-01 17:49:37 (Show Source): You can put this solution on YOUR website!2X+3=4 2X=4-3 2X=1 X=1/2=.5 THIS IS A VERTICLE LINE THROUGH THE POINT (0.5,0)
 Polynomials-and-rational-expressions/154510: Determine whether or not if it can be factored. If not, then state it is prime. 3x^2 + 5x - 11 solutions Answer 113811 by checkley77(12569)   on 2008-09-01 17:38:51 (Show Source): You can put this solution on YOUR website!3x^2 + 5x - 1 IT CAN BE FACTORED USING THE QUADRATIC EQUATION: WHICH PRODUCES THE ANSWERS: (0.180 & -1.847)
 Numbers_Word_Problems/154534: in a class of 68 students, there are 8 fewer democrats than republicans, and there are only half as many independents as democrats if every student is registered as a democrat, republican, or independent, how many students are in each group?1 solutions Answer 113810 by checkley77(12569)   on 2008-09-01 17:34:00 (Show Source): You can put this solution on YOUR website!R+(R-8)+(R-8)/2=68 R+R-8+.5R-4=68 2.5R=68+12 2.5R=80 R=80/2.5 R=32 REPUBLICANS. 32-8=24 DEMOCRATS. 24.2=12 INDEPENDENTS. PROOF: 32+24+12=68 68=68
 Expressions-with-variables/154569: The difference between high and low tides along the Maine coast in November is 19 feet on Monday and x feet on Tuesday. Write an expression to show the average rise and fall of the tide for Monday and Tuesday.1 solutions Answer 113805 by checkley77(12569)   on 2008-09-01 17:25:31 (Show Source): You can put this solution on YOUR website!(19+x)/2
 Numbers_Word_Problems/154538: This question is from textbook Algebra and Trigonometry Structure and Method The dimensions of a rectangle are consecutive odd integers. Find the smallest such rectangle with a perimeter of at least 35 cm.1 solutions Answer 113803 by checkley77(12569)   on 2008-09-01 17:22:49 (Show Source): You can put this solution on YOUR website!x(x+2)>=35 x^2+2x-35>=0 (x+7)(x-5)=0 x=5 for theshorter side. 5+2=7 for the longer side.
 Polynomials-and-rational-expressions/154568: Three equal squares of a side(9x+5y)are placed side by side to form a rectangle. What is the perimeter of the resulting triangle?1 solutions Answer 113802 by checkley77(12569)   on 2008-09-01 17:19:23 (Show Source): You can put this solution on YOUR website!8(9x+5y)=72x+40y is the length of the perimeter of the resulting rectangle.
 Linear-equations/154564: How would I write these in standard form? Has a slope of 3 and has a y-intercept of 4 Passes through the points (2,-6) and (4,-6) Thanks ryan1 solutions Answer 113801 by checkley77(12569)   on 2008-09-01 17:14:58 (Show Source): You can put this solution on YOUR website!Y=mX+B (red line) Y=3X+4 THIS LINE HAS A SLOPE=3 & A Y INTERCEPT=4. (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 3x +4 and y = -6). ---------------------------------------- slope=(-6+6)/4-2)=0/2 represents a horizontal line through -6 (green line).
 Inequalities/154542: Show three forms of the solution: y^3-27<01 solutions Answer 113800 by checkley77(12569)   on 2008-09-01 17:01:59 (Show Source): You can put this solution on YOUR website!y^3-27<0 y^3<27 y<3 answer. proof: let y=2.9 2.9^3-27<0 24.389-27<0 -2.611<0
 Polynomials-and-rational-expressions/154545: I need help solving the following problem: (3v^2 + 2v + 12) / (v + 2) Thanks!1 solutions Answer 113798 by checkley77(12569)   on 2008-09-01 16:56:46 (Show Source): You can put this solution on YOUR website!(3v^2+2v+12)/(v+2) No reduction possible as the numerator cannot be factored - it has irrational roots.
 Proportions/154553: This question is from textbook Mathematics for Elem. Sch. Teachers For a certain event, 812 tickets were sold, for a total of \$1912. If students paid \$2 per ticket and nonstudents paid \$3 per ticket, how many student tickets were sold?1 solutions Answer 113797 by checkley77(12569)   on 2008-09-01 16:51:33 (Show Source): You can put this solution on YOUR website!2x+3(812-x)=1912 2x+2436-3x=1912 -x=1912-2436 -x=-524 x=524 number of \$2 tickets. 812-524=288 number of \$3 tickets. proof: 2*524+3*288=1912 1048+864=1912 1912=1912
 Functions/154558: The problem is -(1/5)d-1=121 solutions Answer 113795 by checkley77(12569)   on 2008-09-01 16:44:43 (Show Source): You can put this solution on YOUR website!-(1/5)d-1=12 -d/5-1=12 -d/5=12+1 -d/5=13 -d=65 d=-65 proof: -1/5*-65-1=12 65/5-1=12 13=12+1 13=13
 Functions/154559: The problem is Jo is thinking of a number. Four less than 9 times the number is 176. Find Jo's number.1 solutions Answer 113794 by checkley77(12569)   on 2008-09-01 16:40:58 (Show Source): You can put this solution on YOUR website!9x-4=176 9x=176+4 9x=180 x=180/9 x=20 answer.
 Exponents/154491: Can someone please help me with these problems 1.Use the foil method to multiply (5x-1)(3x-2) 2.Multiply (x-4)(2x^2-7x +8) 3. Perform the indicated operations (7x^2-x+1)-(2x^2-x-3)-(5x^2+3x-10)1 solutions Answer 113753 by checkley77(12569)   on 2008-09-01 10:59:36 (Show Source): You can put this solution on YOUR website!5x-1 3x-2 -------------- 15x^2-3x-10x+2 15x^2-13x+2 ********************************** 2x^2-7x +8 x-4 -------------------- 8x^3-14x^2+8x-8x^2+28x-32 8x^-22x^2+36x-32 *********************************** (7x^2-x+1)-(2x^2-x-3)-(5x^2+3x-10) 7x^2-x+1-2x^2+x+3-5x^2-3x+10 0x^-3x+14 -3x+14
 Radicals/154417: 3(48x^42y^52)^(1/4) Thankyou 1 solutions Answer 113752 by checkley77(12569)   on 2008-09-01 10:53:21 (Show Source): You can put this solution on YOUR website!3(48x^42y^52)^(1/4) 3(4th.rt[48x^42y^52]) 3(2x^10y^13[4th.rt3x^2y^2]) 6x^10y^13[4th.rt3x^2y^2]