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# Recent problems solved by 'checkley77'

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 Polynomials-and-rational-expressions/335908: what the complete factored form of the polynomial w^3x^2y^4-w^6x^3y^21 solutions Answer 240980 by checkley77(12569)   on 2010-08-28 20:11:47 (Show Source): You can put this solution on YOUR website!w^3x^2y^4-w^6x^3y^2 w^3x^2y^2(y^2-w^3x) ans.
 Average/335927: find the bank balance of these numbers. \$52, -\$7, \$20, -\$63,-\$821 solutions Answer 240979 by checkley77(12569)   on 2010-08-28 20:07:57 (Show Source): You can put this solution on YOUR website!\$52, -\$7, \$20, -\$63,-\$82 52-7+20-63-82 72-152=-80 is the balance.
 Rectangles/335937: Suppose you double the lengths of the sides of a rectangle. What is the relationship between the perimeter of the new rectangle and the perimeter of the original rectangle? 1 solutions Answer 240976 by checkley77(12569)   on 2010-08-28 20:05:02 (Show Source): You can put this solution on YOUR website!Let L & W be the original sides. 2L+2W=perimeter. Let 2L & 2W be the expanded sides. 2*2L+2*2W=perimeter 4L+4W=perimeter for the expanded redtangle. The perimeter is doubled.
 Graphs/335964: the dealer's asking price for new car is \$9750. Maria Blackmunn offered to pay \$7800. Maria's price is what percent of the dealer's price? 1 solutions Answer 240966 by checkley77(12569)   on 2010-08-28 19:46:36 (Show Source): You can put this solution on YOUR website!7,800/9,750=.8=80% ans.
 Graphs/335965: the dealer's asking price for new car is \$9750. Maria Blackstone offered to pay \$7800. Maria's price is what percent of the dealer's price? 1 solutions Answer 240965 by checkley77(12569)   on 2010-08-28 19:45:35 (Show Source): You can put this solution on YOUR website!7,800/9,750=.8=80% ans.
 Unit_Conversion_Word_Problems/335969: MAny major league baseball pitchers can throw the ball at 90 miles per hour. At that speed how long does it take a pitch to travel from th e pitcher's mound to home plate a distance of 60 feet 6 inches? Give answer to the nearest hundreth of a second.1 solutions Answer 240964 by checkley77(12569)   on 2010-08-28 19:43:20 (Show Source): You can put this solution on YOUR website!60.5/90*5280 60.5/475,200=.0001263 hours .0001263*3,600=.45 seconds.
 Equations/335980: The base of a 16ft ladder is 4ft from a wall. How high on the wall does the ladder reach?1 solutions Answer 240962 by checkley77(12569)   on 2010-08-28 19:35:04 (Show Source): You can put this solution on YOUR website!You have a right triangle. a^2+b^2=c^2 4^2+b^2=256 16+b^2=256 b^2=256-16 b^2=240 b=sqrt240 b=15.49 ft. ans. for the height of the ladder up the wall.
 Linear_Equations_And_Systems_Word_Problems/335419: The selling price of a refrigerator is \$584. If the markup is 25% of the dealer's cost, what is the dealer's cost of the refrigerator?1 solutions Answer 240462 by checkley77(12569)   on 2010-08-26 20:54:59 (Show Source): You can put this solution on YOUR website!1.25x=584 x=584/1.25 x=\$467.20 is the dealer's cost.
 Travel_Word_Problems/335427: Ivan runs 4 miles in 30 minutes. At the same rate, how many miles would he run in 48 minutes?1 solutions Answer 240457 by checkley77(12569)   on 2010-08-26 20:51:14 (Show Source): You can put this solution on YOUR website!4/30=x/48 30x=4*48 30x=192 x=192/30 x=6.4 ans.
 Distributive-associative-commutative-properties/335438: x+5x+8(x+2)1 solutions Answer 240451 by checkley77(12569)   on 2010-08-26 20:47:34 (Show Source): You can put this solution on YOUR website!x+5x+8(x+2) 6x+8x+16 14x+16 2(7x+8) ans.
 Numeric_Fractions/335442: What is 2 over 3 - 1 over 3 over 3 over 41 solutions Answer 240450 by checkley77(12569)   on 2010-08-26 20:45:51 (Show Source): You can put this solution on YOUR website!2/3-1/3/(3/4) 2/3-1/3*4/3 2/3-4/9 6/9-4/9=2/9 ANS.
 Human-and-algebraic-language/335445: a rectangle is 12 meters longer than it is wide. its perimeter is 68 meters. find its length and width.1 solutions Answer 240449 by checkley77(12569)   on 2010-08-26 20:43:17 (Show Source): You can put this solution on YOUR website!L=W+12 2L+2W=68 2(W+12)+2W=68 2W+24+2W=68 4W=68-24 4W=44 W=44/4 W=11 ANS. FOR THE WIDTH. L=11+12=23 ANS. FOR THE LENGTH. PROOF: 2*11+2*23=68 22+46=68 68=68
 test/335451: How much coffee costing 85 cents a pound must be added to 150 pounds costing 90 cents a pound to make a mixture costing 87 cents a pound?1 solutions Answer 240442 by checkley77(12569)   on 2010-08-26 20:35:37 (Show Source): You can put this solution on YOUR website!.85X+.90*150=.87(150+X) .85X+135=130.5+.87X .85X-.87X=130.5-135 -.02X=-4.5 X=-4.5/-.02 X=225 POUNDS OF \$.85 COFFEE IS USED. PROOF: .85*225+.90*150=.87(150+225) 191.25+135=.87*375 326.25=326.25
 Geometric_formulas/335454: 4x+8-4=-161 solutions Answer 240438 by checkley77(12569)   on 2010-08-26 20:28:51 (Show Source): You can put this solution on YOUR website!4x+8-4=-16 4X=-16-8+4 4X=-20 X=-20/4 X=-5 ANS. PROOF: 4*-5+8-4=-16 -20+8-4=-16 -24+8=-16 -16=-16
 test/335464: The attendance at a moving theater on a certain day was 737 persons. If there were 289 more adults than children, how many children were there?1 solutions Answer 240436 by checkley77(12569)   on 2010-08-26 20:24:13 (Show Source): You can put this solution on YOUR website!C+C+289=737 2C=737-289 2C=448 C=448/2 C=224 CHILDREN. 224+289=513 ADULTS. PROOF: 224+513=737 737=737
 Travel_Word_Problems/335467: ed is a gardener. it takes ed 35 minutes to plant a bush and 55 minutes to plant a tree. write an algebraic expression to find how long it takes to plant b bushes and t trees 1 solutions Answer 240435 by checkley77(12569)   on 2010-08-26 20:16:58 (Show Source): You can put this solution on YOUR website!B=NUMBER OF BUSHES. T=NUMBER OF TREES. 35B+55T ANS.
 Human-and-algebraic-language/335457: luis weighs 5 pounds more than carla. carla weighs 2 pounds more than rita. together their weights total is 333 pounds how much does each weigh???1 solutions Answer 240434 by checkley77(12569)   on 2010-08-26 20:15:04 (Show Source): You can put this solution on YOUR website!R+R+2+R+2+5=333 3R=333-9 3R=324 R=324/3 R=108 POUNDS FOR RITA. 108+2=110 POUNDS FOR CARLA. 108+2+5= 115 POUNDS FOR LUIS. PROOF: 108+110+115=333 333=333
 Geometry_Word_Problems/335460: jessica's school is 45 miles from the center of Boston, Massachusetts, and 38 miles from the center of Providence, Rhode Island. With this information, you know that the cities are between _?_ and _?_ miles apart.1 solutions Answer 240432 by checkley77(12569)   on 2010-08-26 20:09:31 (Show Source): You can put this solution on YOUR website!45-38=7 miles ans. 45+38=83 miles ans.
 Travel_Word_Problems/335376: A car moves 46 seconds and covers 2 miles. Find the average speed. I know that there are 3600 seconds in an hour, but I feel pretty lost after that. I tried 2=(x/46) and come up with 92MPH is that the correct way to solve? 1 solutions Answer 240428 by checkley77(12569)   on 2010-08-26 19:52:24 (Show Source): You can put this solution on YOUR website!46/3,600=2/x 46x=3,600*2 46x=7,200 x=7,200/46 x=156.52 MPH. ans.
 expressions/335380: 15x3(2)-2(3)=15 is my problem i don't know how to arrive at this solution1 solutions Answer 240421 by checkley77(12569)   on 2010-08-26 19:40:09 (Show Source): You can put this solution on YOUR website!15x3(2)-2(3)=15 30x^3-6=15 x^3=15/30 x^3=1/2 x=cubert(1/2) x=.7937 ans.
 Rectangles/335384: A rectangle has a length of 5 feet and a width of 3 feet. When the length and width are each increased by the same amount, the perimeter is increased by 10 feet. By how much are the length and width increased?1 solutions Answer 240416 by checkley77(12569)   on 2010-08-26 19:33:57 (Show Source): You can put this solution on YOUR website!2*5+2*3+10=2(5+x)+2(3+x) 10+6+10=10+2x+6+2x 26=4x+16 4x=26-16 2x=10 x=10/2 x=5 feet ans. Proof: 2*5+2*3+10=2(5+5)+2(3+5) 10+6+10=2*10+2*8 26=10+16 26=26
 Angles/335385: The smallest angle in a triangle is ten degrees smaller than the meduim angle, and the larget angle is ten degrees more than twice the medium angle. What are the angle measures in the triangle? equation: solution: 1 solutions Answer 240411 by checkley77(12569)   on 2010-08-26 19:22:36 (Show Source): You can put this solution on YOUR website!x-10 smaller angle. x=medium angle. 2x+10=largest angle. x-10+x+2x+10=180 4x=180 4x=180 x=180/4 x=45 degrees for the medium angle. 45-10=35 degrees for the smallest angle. 2*45+10=90+10=100 degrees for the largest angle. Proof: 35+45+100=180 180=180
 Square-cubic-other-roots/335388: How would I rewrite the expression 2ab^3c^-3 using only positive exponents? I would have thought to rewrite it all over one, But i'm not sure due to b having a positive exponent already. Thanks.1 solutions Answer 240407 by checkley77(12569)   on 2010-08-26 19:12:26 (Show Source): You can put this solution on YOUR website!2ab^3c^-3 2ab^3/c^3 ans.
 test/335393: ] Use a proportion to solve the problem. The ratio of the distances a 7-iron and a 5-iron will drive a golf ball is 5 to 6. If a golfer averages 137 yards with a 7-iron, how far should he average with a 5-iron? 1 solutions Answer 240404 by checkley77(12569)   on 2010-08-26 19:06:36 (Show Source): You can put this solution on YOUR website!5/6=x/137 6x=5*137 6x=685 x=685/5 x=114.17 yards.
 Square-cubic-other-roots/335397: what is the 6th root of x to the 12 power1 solutions Answer 240402 by checkley77(12569)   on 2010-08-26 19:02:18 (Show Source): You can put this solution on YOUR website!6throotx^12=x^2 ans.
 Exponents/335402: How do I write 807,400 in expanded form using exponents? Please HELP!1 solutions Answer 240401 by checkley77(12569)   on 2010-08-26 18:59:30 (Show Source): You can put this solution on YOUR website!8.074*10^5
 Surface-area/335405: The larger box is 8in. wide, 11 in. high, and 3 in. deep. How many square inches of cardboard are needed to make this box? Can you show me the formula?1 solutions Answer 240397 by checkley77(12569)   on 2010-08-26 18:56:42 (Show Source): You can put this solution on YOUR website!A box has 8 piecess (2 ends, 2 tops & 2 sides) 2*8*11=176^2 in. 2*8*3=48^2 in. 2*11*3=66^2 in. 176+48+66=290^2 in.
 Mixture_Word_Problems/335325: How many gallons of a 30% acid solution must be mixed with 50 gallons of a 70% acid solution to make a 55% solution?1 solutions Answer 240382 by checkley77(12569)   on 2010-08-26 17:29:45 (Show Source): You can put this solution on YOUR website!.30x+.70*50=.55(50+x) .30x+35=27.5+.55x .30x-55x=27.5-35 -.25x=-7.5 x=-7.5/-.25 x=30 gallons of 30% solution. Proof: .30*30+.70*50=.55(50+30) 9+35=.55*80 44=44
 Complex_Numbers/335333: x^2 -3x +2 =01 solutions Answer 240381 by checkley77(12569)   on 2010-08-26 17:20:34 (Show Source): You can put this solution on YOUR website!x^2 -3x +2 =0 (x-2)(x-1)=0 x-2=0 x=2 ans. x-1=0 x=1 ans.
 Miscellaneous_Word_Problems/335341: 12. Solve using the five-step problem-solving process. Show all steps necessary to arrive at your solution. The area of a circle is 45 square meters. What is its circumference? (Use п = 3.14. Hint: Area of Circle: A = пr2 and Circumference of Circle: C = 2пr) 1 solutions Answer 240380 by checkley77(12569)   on 2010-08-26 17:16:03 (Show Source): You can put this solution on YOUR website!45=pir^2 45=3.14*r^2 r^2=45/3.14 r^2=14.33 r=sqrt13.33 r=3.79 meters ans c=2pir c=2*3.14*3.79 c=2*11.9 c=23.8 meters ans. for the circumferance.
 Geometric_formulas/335343: I'd Like To Know How To Solve 4x-6+2x-51 solutions Answer 240379 by checkley77(12569)   on 2010-08-26 17:10:37 (Show Source): You can put this solution on YOUR website!4x-6+2x-5 6x-11 ans.