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Recent problems solved by 'checkley77'

checkley77 answered: 12560 problems
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Miscellaneous_Word_Problems/362950: (Assume the volume is kept constant) If the absolute temperature of a gas with a pressure of 10 psi decreases by a factor of 2, what will be the new pressure? 1 solutions Answer 258804 by checkley77(12569)   on 2010-10-28 09:23:11 (Show Source): You can put this solution on YOUR website! 10/2=5 psi. ans.

Human-and-algebraic-language/362952: After a recent election, there were 2 more Republicansa governors than Democratic governors in the United States. If there are 50 states governors total, how many Democrats and how many Republicans held governor's offices after this election? 1 solutions Answer 258802 by checkley77(12569)   on 2010-10-28 09:22:00 (Show Source): You can put this solution on YOUR website! R+D=50 R=D+2 D+2+D=50 2D=48 D=48/2 D=24 NUMBER OF DEMOCRAT GOVERNORS. R=24+2=26 NUMBER OF REPUBLICAN GOVERNORS. PROOF: 24+26=50 50=50

Percentage-and-ratio-word-problems/363001: This recipe will make 6 muffins: 1 cup of milk, 1 2/3 cups of flour, 2 eggs, 1/2 teaspoon salt, 1 1/2 teaspoons baking powder. Write the recipe for six dozen muffins? 1 solutions Answer 258798 by checkley77(12569)   on 2010-10-28 09:09:43 (Show Source): You can put this solution on YOUR website! 12 cups of milk 20 cups of flouer 24 eggs 6 teaspoons of salt 18 teaspoons of baking powder

Percentage-and-ratio-word-problems/363027: A retail store sells a jacket for 75% more than the wholesale price it is charged by the manufacturer. If the store sells the jacket for $49, how much is it charged by the manufacturer ? 1 solutions Answer 258796 by checkley77(12569)   on 2010-10-28 09:04:09 (Show Source): You can put this solution on YOUR website! x+.75x=49 1.75x=49 x=49/1.75 x=$28 is the manufacturer's price.

Linear-equations/363047: determine whether y=2x-1 is a linear equation. if so, write the equation in standard form. 1 solutions Answer 258789 by checkley77(12569)   on 2010-10-28 08:58:15 (Show Source): You can put this solution on YOUR website! Y=mX+b is the linear equation format. y=2x-1 This is the linear form. (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 2x -1).

Money_Word_Problems/362618: you are offered two jobs selling college textbooks. one company offers an annual salary of $25,000 and a year-end bonus of 1% of your total sales. the other company offers an annual salary of $20,000 plus a year-end bonus of 2% of your total sales. how much would you have to sell in a year to make the second offer the better offer? 1 solutions Answer 258498 by checkley77(12569)   on 2010-10-27 17:47:19 (Show Source): You can put this solution on YOUR website! 20,000+.02X>25,000+.01X .02X-.01X>25,000-20,000 .01X>5,000 X>5,000/.01 X>$500,000 IS THE AMOUNT OF THE TOTAL SALES NEEDED TO MAKE THE TWO OFFERS THE SAME. SALES ABOVE $500,000 WILL MAKE THE SECOND JOB A BETTER DEAL. PROOF: LET SALES=$500,001 20,000+.02*500,001>25,000+.01*500,001 20,000+10,000.02>25,000+5,000.01 30,000.02>30,000.01

Expressions-with-variables/362621: A truck traveling at a constant rate of 45 miles per hour leaves Albany. One hour later a car traveling at a constant rate of 60 miles per hour also leaves Albany traveling in the same direction of the same highway. How long will it take for the car to catch up to the truck if both vehicles continue in the same direction on the highway? I do not understand can u please help? 1 solutions Answer 258495 by checkley77(12569)   on 2010-10-27 17:38:57 (Show Source): You can put this solution on YOUR website! D=RT D=45T FOR THE TRUCK. D=60(T-1) FOR THE CAR. BECAUSE THE DISTANCES ARE EQUAL: 45T=60(T-1) 45T=60T-60 45T-60T=-60 -15T=-60 T=-60/-15 T=4 HOURS AFTER THE TRUCK LEAVES THE CAR WILL CATCH THE TRUCK. PROOF: 45*4=60(4-1) 180=60*3 180=180

Linear-systems/362619: Ms. Anthony wants to create a special blend using two coffees, one priced ar $8.40 per pound and the other at $7.28 per pound. How many pounds of the $7.28 coffee should she mix with 9 pounds of the $8.40 coffee to sell the mixture for $7.95 per pound? 1 solutions Answer 258492 by checkley77(12569)   on 2010-10-27 17:33:47 (Show Source): You can put this solution on YOUR website! 8.40*9+7.28x=7.95(9+x) 75.6+7.28x=71.55+7.95x 7.28x-7.95x=71.55-75.60 -.67x=-4.05 x=-4.05/-.67 x=6.045 pounds of $7.28 coffee is used. Proof: 8.40*9+7.28*6.045=7.95(9+6.045) 75.6+44=7.95*15.045 119.6=119.6

Numbers_Word_Problems/362623: the sum of three consecutive numbers = 258 What are these numbers 1 solutions Answer 258487 by checkley77(12569)   on 2010-10-27 17:14:07 (Show Source): You can put this solution on YOUR website! Let x, x+1 & x+2 be the 3 numbers. x+x+1+x+2=258 3x=258-3 3x=255 x=255/3 x=85 ans. for the smaller number. 85+1=86 ans. for the middle number. 85+2=87 ans. for the larger umber. Proof: 85+86+87=258 258=258

Surface-area/362635: An oval track is made by erecting semicircles on each end of a 58m by 116m rectangle. Find the length of the track and area enclosed by the track. Use 3.14 for pie. The length of the track is? The area enclosed by the track is? 1 solutions Answer 258485 by checkley77(12569)   on 2010-10-27 17:09:30 (Show Source): You can put this solution on YOUR website! IF the semicircle is on the 58m end then: L=2*116+3.14*58 L=232+3.14*58 L=232+182.12=414.12 m. ans. for the length. A=58*114+3.14(58/2)^2 A=6,612+3.14(29)^2 A=6,612+3.14*841 A=6,612+2,640.74 A=9,252.74 m^2. ans. -------------------------- IF the semicircircle is on the 116m end then just replace the 58 by 116.

Polynomials-and-rational-expressions/362636: I'm having diffuculty solving this problem. Add; (9x^2-xy+y^2)+(-x^2-9xy+8y^2) DO I add across or??? 1 solutions Answer 258482 by checkley77(12569)   on 2010-10-27 16:53:38 (Show Source): You can put this solution on YOUR website! (9x^2-xy+y^2) +(-x^2-9xy+8y^2) add. ---------------------- 8x^2-10xy+9y^2 ans.

Inverses/362639: What is the inverse of 6 divided by x+3? 1 solutions Answer 258478 by checkley77(12569)   on 2010-10-27 16:50:16 (Show Source): You can put this solution on YOUR website! (x+3)/6 ans.

Graphs/362647: (-9,-5)(-12,-7) Find slope if it exists 1 solutions Answer 258473 by checkley77(12569)   on 2010-10-27 16:45:40 (Show Source): You can put this solution on YOUR website! (-9,-5)(-12,-7) Slope=(y2-y1)/(x2-x1) Slope=(-7+5)/(-12+9) Slope=-2/-3 Slope=2/3 ans.

Polynomials-and-rational-expressions/362653: Factor each trinomial. if possible. 30r5+63r4-30r3 1 solutions Answer 258469 by checkley77(12569)   on 2010-10-27 16:41:57 (Show Source): You can put this solution on YOUR website! 30r5+63r4-30r3 3r^3(10r^2+21r-10) 3r^3(4r+10)(2.5r-1) ans.

test/362582: Perform the indicated operation 3m + 6m/8/3/4 1 solutions Answer 258460 by checkley77(12569)   on 2010-10-27 16:27:30 (Show Source): You can put this solution on YOUR website! 3m + 6m/8/3/4 Invert the rightmost fraction & multiply. 3m+(6m/8)(4/3) 3m+24m/24 Reduce the fraction & add common terms. 3m+m=4m ans.

Travel_Word_Problems/362585: two buses leave towns 756 miles apart at the same time and travel toward each other. one bus travels at 14 mi/hour slower than the other. if they meet in 7 hours, what is the rate of each bus? 1 solutions Answer 258459 by checkley77(12569)   on 2010-10-27 16:23:15 (Show Source): You can put this solution on YOUR website! D=RT 756=(R+R-14)7 756=(2R-14)7 756=14R-98 14R=756+98 14R=854 R=854/14 R=61 MPH. IS THE SPEED OF THE FASTER BUS. 61-14=47 MPH. IS THE SPEED OF THE SLOWER BUS. PROOF: 756=(61+47)7 756=108*7 756=756

Linear_Equations_And_Systems_Word_Problems/362589: Please help me here: "The perimeter of a rectangular sign is 58cm and its area is 204cm^2. Find the length and width of the sign." If you may, please provide a step by step process so i can learn how to do it, instead of just getting the answer. 1 solutions Answer 258457 by checkley77(12569)   on 2010-10-27 16:13:59 (Show Source): You can put this solution on YOUR website! 2L+2W=58 FOR THE PERIMETER. LW=204 FOR THE AREA. L=204/W NOW REPLACE L WITH (204/W) IN THE FIRST EQUATION & SOLVE FOR W. 2(204/W)+2W=58 408/W+2W=58 (408+2W*W)/W=58 (408+2W^2)/W=58 CROSS MULTIPLY. 2W^2+408=58*W 2W^2+408=58W 2W^2-58W+408=0 2(W^2-29W+204)=0 (W-17)(W-12)=0 W-17=0 W=17 ANS. W-12=0 W=12 ANS. L=204/17=12 ANS. L=204/12=17 ANS. PROOF: 12*17=204 204=204

Numbers_Word_Problems/362593: The sum of two numbers is 25. One number is 7 less than 3 times the other number. x=larger number y=lesser number This is what I have so far. What do I do next? x=9 x+y=120 1 solutions Answer 258455 by checkley77(12569)   on 2010-10-27 15:55:25 (Show Source): You can put this solution on YOUR website! x=9 x+y=120 QUESTION? WHERE DID YOU GET X=9 & X+Y=120??????? ------------------------------------- X+Y=25 OR X=25-Y X=3Y+7 25-Y=3Y+7 -Y-3Y=7-25 -4Y=-18 Y=-18/-4 Y=4.5 ANS. FOR THE SMALLER NUMBER. X=25-4.5 X=20.5 ANS. FOR THE LARGER NUMBER. PROOF: 20.5=3*4.5+7 20.5=13.5+7 20.5=20.5

Numbers_Word_Problems/362599: A horse and two cows together cost $680. Find the cost of a cow and a horse, if a horse cost $80 more than a cow. 1 solutions Answer 258450 by checkley77(12569)   on 2010-10-27 15:43:09 (Show Source): You can put this solution on YOUR website! H=C+80 H+2C=680 (C+80)+2C=680 C+80+2C=680 3C=680-80 3C=600 C=600/3 C=$200 COST OF ONE COW. H=2*200+80=400+80=$480 COST OF ONE HORSE. PROOF: 480+200=680 680=680

Numbers_Word_Problems/362602: A pile of 40 coins consists of nickels and dimes. The total value of the coins is $3.35. Find the number of each type of coin. 1 solutions Answer 258448 by checkley77(12569)   on 2010-10-27 15:36:54 (Show Source): You can put this solution on YOUR website! N+D=40 OR N=40-D .05N+.10D=3.35 .05(40-D)+.10D=3.35 2-.05D+.10D=3.35 .05D=3.35-2 .05D=1.35 D=1.35/.05 D=27 DIMES. N=40-27=13 NICKELS. PROOF: .05*13+.10*27=3.35 .65+2.70=3.35 3.35=3.35

Polynomials-and-rational-expressions/362612: I need help with a math problem. Subtract. (-2a+6b-c)-(-3b+6c-6d) 1 solutions Answer 258447 by checkley77(12569)   on 2010-10-27 15:31:40 (Show Source): You can put this solution on YOUR website! (-2a+6b-c)-(-3b+6c-6d) -2a+6b-c+3b-6c+6d -2a+9b-7c+6d ans.

Rectangles/362614: A theater sold $330 worth of tickets. An adult ticket costs $2.00 each and a child’s ticket cost $1 each. If total tickets sold were 190, how many tickets of each kind were sold? 1 solutions Answer 258446 by checkley77(12569)   on 2010-10-27 15:29:07 (Show Source): You can put this solution on YOUR website! A+C=190 A=190-C 2A+1C=330 2(190-C)+C=330 380-2C+C=330 -C=330-380 -C=-50 C=50 ANS. FOR THE NUMBER OF CHILDREN TICKETS. A=190-50=140 ANS. FOR THE NUMBER OF ADULT TICKETS. PROOF: 2*140+50=330 280+50=330 330=330

Rectangles/362474: The length of a rectangle is 6 cm more than two times the width. If the perimeter of the rectangle is 36 cm, what are its dimensions? 1 solutions Answer 258349 by checkley77(12569)   on 2010-10-27 09:55:43 (Show Source): You can put this solution on YOUR website! L=2W+6 2L+2W=36 2(2W+6)+2W=36 4W+12+2W=36 8W=36-12 6W=24 W=24/6 W=4 cm. ANS. FOR THE WIDTH. L=2*4+6=8+6=14 cm. ANS.FOR THE LENGTH. PROOF: 2*14+2*4=36 28+8=36 36=36

Rectangles/362308: what is the formula for a rectangle with a perimeter of 54"? its width is 1/2 the legnth. 1 solutions Answer 258345 by checkley77(12569)   on 2010-10-27 09:50:44 (Show Source): You can put this solution on YOUR website! W=L/2 2L+2W=54 2L+2(L/2)=54 2L+L=54 3L=54 L=54/3 L=18 ANS. FOR THE LENGTH. W=18/2=9 ANS. FOR THE LENGTH. PROOF: 2*9+2*18=54 18+36=54 54=54

Rectangles/362317: arectangle has a perimeter 54".What is the formula for finding the width and the legnth? the width is 1/2 the legnth. 1 solutions Answer 258343 by checkley77(12569)   on 2010-10-27 09:48:41 (Show Source): You can put this solution on YOUR website! W=L/2 2L+2W=54 2L+2(L/2)=54 2L+L=54 3L=54 L=54/3 L=18 ANS. FOR THE LENGTH. W=18/2=9 ANS. FOR THE LENGTH. PROOF: 2*9+2*18=54 18+36=54 54=54

Polynomials-and-rational-expressions/362401: What does it mean to completely factor and expression? Illustrate factoring an expression completely by showing which factoring formula(s) you would apply to completely factor the expression "x4 - 1"? 1 solutions Answer 258340 by checkley77(12569)   on 2010-10-27 09:43:51 (Show Source): You can put this solution on YOUR website! x^4 - 1 This is a perfect square polynomial. (x^2+1)(x^2-1) The second factor is also a perfect square polynomial. (x^2+1)(x+1)(x-1) ans.

test/362404: I am having trouble with fractions. -29/3=4x-5x+1/3 1 solutions Answer 258336 by checkley77(12569)   on 2010-10-27 09:34:17 (Show Source): You can put this solution on YOUR website! -29/3=4x-5x+1/3 4x-5x=-29/3-1/3 -x=-30/3 -x=-10 x=10 ans. Proof: -29/3=4*10-5*10+1/3 -29/3-1/3=40-50 -30/3=-10 -10=-10

Polynomials-and-rational-expressions/362422: 1 solutions Answer 258334 by checkley77(12569)   on 2010-10-27 09:28:37 (Show Source): You can put this solution on YOUR website! No problem submitted.

Polynomials-and-rational-expressions/362429: Factor completely: 9ab + 12ax − 6b − 8x 1 solutions Answer 258333 by checkley77(12569)   on 2010-10-27 09:26:35 (Show Source): You can put this solution on YOUR website! 9ab + 12ax − 6b − 8x 3a(3b+4x)-2(3b+4x) (3a-2)(3b+4x) ans.

Polynomials-and-rational-expressions/362434: Factor completely: 14bx^2 − 7x^3 − 4b + 2x 1 solutions Answer 258330 by checkley77(12569)   on 2010-10-27 09:23:19 (Show Source): You can put this solution on YOUR website! 14bx^2 − 7x^3 − 4b + 2x 7X^2(2B-X)-2(2B-X) (7X^2-2)(2B-X) ANS.

Triangles/362463: if a right triangle has a leg measuring 52 m and a hypotenuse measuring 63 m. What is the length of the other leg? 1 solutions Answer 258324 by checkley77(12569)   on 2010-10-27 09:12:59 (Show Source): You can put this solution on YOUR website! A^2+B^2=C^2 52^2+B^2=63^2 2,704+B^2=3,969 B^2=3,969-2,704 B^2=1,265 B=SQRT1,265 B=35.567m. ANS. FOR THE SECOND LEG.