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Recent problems solved by 'checkley77'

checkley77 answered: 12560 problems
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expressions/168810: 25-3/7f=19+4/7f 1 solutions Answer 124530 by checkley77(12569)   on 2008-11-21 08:47:00 (Show Source): You can put this solution on YOUR website! 25-3/7f=19+4/7f -3f/7-4f/7=19-25 -7f/7=-6 -f=-6 f=6 ans. 25-3/7*6=19+4/7*6 25-18/7=19+24/7 25-19=24/7+18/7 6=42/7 6=6

Proportions/168815: This question is from textbook 6/13 = 7.8/m 1 solutions Answer 124528 by checkley77(12569)   on 2008-11-21 08:33:03 (Show Source): You can put this solution on YOUR website! 6/13=7.8/M 6M=13*7.8 6M=101.4 M=101.4/6 M=16.9 ans.

Linear_Algebra/168860: This question is from textbook prentice hall Algebra2 with trigonometry Please help me solve this equation: using a system of two equations: Soybean is 16% protein and corn meal is 9% protein. How many pounds of each should be mixed toghther to get a 350-lb mixture that 12% protein? 1 solutions Answer 124527 by checkley77(12569)   on 2008-11-21 08:30:15 (Show Source): You can put this solution on YOUR website! NOT FAMILIAR WITH A 2 EQUATION SYSTEM TO SOLVE THESE TYPES OF PROBLEMS. HERE'S THE STANDARD METHOD. .16X+.09(350-X)=.12*350 .16X+31.5-.09X=42 .07X=42-31.5 .07X=10.5 X=10.5/.07 X=150 LB. OF SOYBEANS ARE USED. 350-150=200 LB. OF CORN MEAL IS USED. PROOF: .16*150+.09*200=42 24+18=42 42=42

Miscellaneous_Word_Problems/168876: Please help me solve this problem. Which is larger: 3rd root of 1/4 or the 4th root of 1/3? Please show your work and explain your answer. 1 solutions Answer 124525 by checkley77(12569)   on 2008-11-21 08:21:28 (Show Source): You can put this solution on YOUR website! 3rd root of 1/4 or the 4th root of 1/3 3RDRT(1/4)=.62996 4THRT(1/3)=.7598 ANS FOR THE LARGEST VALUE.

Word_Problems_With_Coins/168877: This question is from textbook Intermediate Algebra Please Help Me. I need an IN DEPTH EXPLANATION OF HOW TO SOLVE THIS PROBLEM. This question was answered but I was not given an full explanation. The work was not shown. I need to understand how to get the answer step by step. Otis Taylor has a box of coins that he uses when playing poker with his friends. The box currently contains 44 coins, consisting of pennies, dimes, and quarters. The number of pennies is equal to the number of dimes, and the total value is $4.37. How many of each denomination of coin does he have in the box? 1 solutions Answer 124523 by checkley77(12569)   on 2008-11-21 08:15:56 (Show Source): You can put this solution on YOUR website! P=D P+D+Q=44 D+D+Q=44 2D+Q=44 Q=44-2D .25Q+.10P+.01D=4.37 .25(44-2D)+.10D+.01D=4.37 11-.50D+.10D+.01D=4.37 -.39D=4.37-11 -.39D=-6.63 D=-6.63/-.39 D=17 NUMBER OF DIMES & PENNIES. Q=44-2*17 Q=44-34 Q=10 NUMBER OF QUARTERS. PROOF: .25*10+.10*17+.01*17=4.37 2.50+1.70+.17=4.37 4.37=4.37

Graphs/168761: I need help graphing y+3x+1 1 solutions Answer 124417 by checkley77(12569)   on 2008-11-20 16:27:27 (Show Source): You can put this solution on YOUR website! Should there be an (=) sign in this equation?

Exponential-and-logarithmic-functions/168681: This question is from textbook (1/9)4x=27 using same base principle 1 solutions Answer 124416 by checkley77(12569)   on 2008-11-20 16:25:33 (Show Source): You can put this solution on YOUR website! (1/9)4x=27 4x/9=27 4x=27*9 4x=243 x=243/4 x=60.75 ans. Proof: 1/9*4*60.75=26 243/9=27 27=27

Numeric_Fractions/168686: Perform the indicated operation. 70. -2a2/3a2 • 20a/15a3 1 solutions Answer 124415 by checkley77(12569)   on 2008-11-20 16:20:51 (Show Source): You can put this solution on YOUR website! 70. -2a^2/3a^2•20a/15a^3 -2/3*4/3a^2 -8/9a^2 ans.

Linear-equations/168759: solve by any method. 1. 7x+3y+2=3+7y+6x+11 2. 2x+5y+7=4x+3y-5 1 solutions Answer 124413 by checkley77(12569)   on 2008-11-20 16:16:41 (Show Source): You can put this solution on YOUR website! 1. 7x+3y+2=3+7y+6x+11 7x-6x+3y-7y=11-2 x-4y=9 -4y=-x+9 y=-x/-4+9/-4 y=x/4-9/4 ans.(red line) 2. 2x+5y+7=4x+3y-5 2x-4x+5y-3y=-5-7 -2x+2y=-12 2y=2x-12 y=2x/2-12/2 y=x-6 (green line) (graph 300x200 pixels, x from -6 to 6, y from -10 to 10, of TWO functions x/4 -9/4 and x -6). Ans. (5,-1)

Graphs/168762: I need help graphing y=3x+1 1 solutions Answer 124410 by checkley77(12569)   on 2008-11-20 16:07:38 (Show Source): You can put this solution on YOUR website! y=3x+1 (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, 3x +1).

Linear-equations/168758: solve each system by graphing. 1. 4y=x=2 2x+y=5 2. 4x+5y=1 3x-y=-4 1 solutions Answer 124409 by checkley77(12569)   on 2008-11-20 16:06:16 (Show Source): You can put this solution on YOUR website! 1. 4y=x+2 [I'll assume the second = should be a +] y=x/4+2/4 y=x/4+1/2 (red line) 2x+y=5 y=-2x+5 (green line) (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions x/4 +1/2 and -2x +5). Ans.(2,1) 2. 4x+5y=1 5y=-4x+1 y=-4x/5+1/5 (red line) 3x-y=-4 -y=-3x-4 y=3x+4 (green line) (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -4x/5 +1/5 and 3x +4). Ans. (-1,1)

Expressions-with-variables/168757: I need help solving this problem, I just can't seem to get it straight in my head. I am supposed to simplify and combine like terms (1/3)(4x + 4) - (2/3)(5x - 3) thanks 1 solutions Answer 124407 by checkley77(12569)   on 2008-11-20 15:58:59 (Show Source): You can put this solution on YOUR website! (1/3)(4x+4)-(2/3)(5x-3) 4x/3+4/3-(2*5x)/3+(2*3)/3 (4x+4)/3-10x/3+6/3 (4x+4-10x+6)/3 (-6x+10)/3 2(-3x+5)/3 or 2/3(-3x+5)

Equations/168755: Hi, I am taking an algebra class online and need help. I do not have the barcode of the book because I print out the chapters given online. anyway here is the problem.I have figured out how to work the problem except for one area. 4y-5+y+23=6y+20-3y 5y+18=3y+20 Ok,I know how to get the 18 and the 3y, but what do I do to get the 5y? On my homework, I can have the MathLab help me with the homework answer for a certain problem, but then I'll need to do another problem to get credit. I'm having a big problem figuring out how to get to the 5y. Can you help? I failed the first class and this is my second time around for this class online. Candy 1 solutions Answer 124403 by checkley77(12569)   on 2008-11-20 15:53:07 (Show Source): You can put this solution on YOUR website! 4y-5+y+23=6y+20-3y [combine like terms.] [4Y+Y=5Y, 23-5=18, 6Y-3Y=3Y] 5y+18=3y+20 [subtract 3y from both sides, sibtract 18 from both sides] 5Y-3Y=20-18 [subtract 3y from 5y, subtract 18 from 20] 2Y=2 [divide both sides by 2] Y=2/2 [reduce the fraction] Y=1 ans.

Radicals/168751: The base of a ladder is 10 ft away from the wall. The top of the ladder is 11 ft from the floor. Find the length of the ladder to the nearest thousandth. 1 solutions Answer 124400 by checkley77(12569)   on 2008-11-20 15:46:50 (Show Source): You can put this solution on YOUR website! 10^2+11^2=L^2 100+121=L^2 L^2=221 L=SQRT221 L=14.866 FT. IS THE LENGTH OF THE LADDER.

Miscellaneous_Word_Problems/168658: Please help me solve this problem. Find the simplified value of 8888^4/2222^4 . Please show your work. 1 solutions Answer 124314 by checkley77(12569)   on 2008-11-20 09:06:46 (Show Source): You can put this solution on YOUR website! 8888^4/2222^4=6.24*10^15/2.43*10^13=256 ans.

Average/168672: solve: 1.(2a-7)(a+9)=0 2.64x^2-9=0 3.x(x+3)=18 factor: 1.2ab+2ay+bx+xy 1 solutions Answer 124309 by checkley77(12569)   on 2008-11-20 08:54:12 (Show Source): You can put this solution on YOUR website! 1.(2a-7)(a+9)=0 2A^2-7A+18A-63=0 2A^2+11A-63=0 --------------- 2.64x^2-9=0 (8X+3)(8X-3)=0 --------------- 3.x(x+3)=18 X^2+9X-18=0 -------------- factor: 1.2ab+2ay+bx+xy 2A(B+Y)+X(B+Y) (2A+X)(B+Y)

Polynomials-and-rational-expressions/168673: The length of a rectangle is three times the width. The area is 108in^2. Find the length and the width. 1 solutions Answer 124308 by checkley77(12569)   on 2008-11-20 08:49:19 (Show Source): You can put this solution on YOUR website! L=3W LW=108 3W*W=108 3W^2=108 W^2=108/3 W^2=36 W=SQRT36 W=6 IN. FOR THE WIDTH. L=3*6=18 IN.FOR THE LENGTH.

Inequalities/168606: A small company has an advertising budget of $15,000. The company plans to produce and air a television commercial. It will cost $500 to produce the commercial and an additional $50 each time the commercial is aired. How many days can the company afford to run the commercial if it aired once a day? 15,000- 500 14500 divided by 50 290 1 solutions Answer 124257 by checkley77(12569)   on 2008-11-19 19:33:20 (Show Source): You can put this solution on YOUR website! (15,000-500)/50=14,500/50=290 days can be payed for.

Linear-systems/168603: how do you solve this 5(x-3)+4x-1=x+3(x-3) 1 solutions Answer 124256 by checkley77(12569)   on 2008-11-19 19:24:55 (Show Source): You can put this solution on YOUR website! 5(x-3)+4x-1=x+3(x-3) 5x-15+4x-1=x+3x-9 9x-4x=-9+16 5x=7 x=7/5 x=7/5 ans.

Functions/168595: Suppose you are playing a word game with seven distinct letters. How many seven-letter words can there be? 1 solutions Answer 124254 by checkley77(12569)   on 2008-11-19 19:15:50 (Show Source): You can put this solution on YOUR website! Without repeats: 7!=7*6*5*4*3*2*1=5,040 ans.

Equations/168599: solve for x: 3x + 13 = x + 1 1 solutions Answer 124253 by checkley77(12569)   on 2008-11-19 19:10:50 (Show Source): You can put this solution on YOUR website! 3x+13=x+1 3x-x=1-13 2x=-12 x=-12/2 x=-6 ans. Proof: 3*-6+13=-6+1 -18+13=-5 -5=-5

Numbers_Word_Problems/168586: This question is from textbook Holt-Pre Algebra if the sum of the consecutive integers from -22 through x is 72, what is the value of x 1 solutions Answer 124252 by checkley77(12569)   on 2008-11-19 19:08:01 (Show Source): You can put this solution on YOUR website! -22 to +22=0 23+24=47+25=72 Thus the answer is -22 to +25 when summed equals 72.

Polynomials-and-rational-expressions/168588: Factor: 1. 16-m^2 2. 9a^2b^2-100 3. a^2-36+169 4.9x^2+48x+64 5.45-80y^2 6. 15a^2-31ab+10b^2 1 solutions Answer 124251 by checkley77(12569)   on 2008-11-19 19:03:39 (Show Source): You can put this solution on YOUR website! 1. 16-m^2 (4+m)(4-m) 2. 9a^2b^2-100 (3ab+10)(3ab-10) 3. a^2-36+169 Using the quadratic equation we get a=(36+-sqrt[-36^2-4*1*169])/281 a=(36+-sqrt[1,296-676])/2 a=(36+-sqrt620)/2 a=(36+-24.9)/2 a=(36+24.9)/2 a=60.9/2 a=30.45 ans. a=(36-24.9)/2 a=11.1/2 a=5.55 ans. _______________________________________________ I'll leave the rest for you to practice with. 4.9x^2+48x+64 5.45-80y^2 6. 15a^2-31ab+10b^2

test/168580: This question is from textbook plot the points and the slope of the line passing through the points. (0,1) (-2,-6) 1 solutions Answer 124244 by checkley77(12569)   on 2008-11-19 18:07:53 (Show Source): You can put this solution on YOUR website! (0,1) (-2,-6) slope=(y2-y1)(x2-x1) slope=(-6-1)/-2-0) slope=-7/-2 or 7/2 1=7/2*0+b 1=b y=7x/2+1 ans. for the line equation. (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, 7x/2 +1).

Graphs/168467: Bill is paid hourly. If he works 8 hours he will receive $50. Write an equation for his salary based on the number of hours he works. . EXPLAIN WHAT YOU DID TO GET YOUR ANSWER! 1 solutions Answer 124241 by checkley77(12569)   on 2008-11-19 18:04:05 (Show Source): You can put this solution on YOUR website! salary=h(50/8) or salary=6.25h where h=the number of hours worked.

Percentage-and-ratio-word-problems/168570: A company employs 500 people. Due to an increase in business, the company had to hire an additional 10%. What is the total number of employees needed? 1 solutions Answer 124239 by checkley77(12569)   on 2008-11-19 17:55:48 (Show Source): You can put this solution on YOUR website! 500+.10*500=500+50=550 total employees with the 10% increase.

Money_Word_Problems/168573: In the year 2001, a publishing company sold $12 million worth of books. This amount is $5000 less than th amount sold by a competing pulishing company. Find the total sales of the competing company in 2001. 1 solutions Answer 124237 by checkley77(12569)   on 2008-11-19 17:54:23 (Show Source): You can put this solution on YOUR website! 12,000,000+5,000=$12,005,000 amount for the competitor.

Money_Word_Problems/168575: You must pay aq toal of $4,500 in 9 equal payments. Find your monthly payment. Use the formula A=PxN. 1 solutions Answer 124235 by checkley77(12569)   on 2008-11-19 17:52:04 (Show Source): You can put this solution on YOUR website! A=4,500/9 A=$500 IS THE MONTHLY PAYMENT AMOUNT.

Linear-equations/168519: write in standard form... slope=6;(1/2,2) slope=1/4;(4,3) slope=-2;(0,0) 1 solutions Answer 124233 by checkley77(12569)   on 2008-11-19 17:49:37 (Show Source): You can put this solution on YOUR website! slope=6;(1/2,2) 2=6*1/2+b 6/2=-b+2 3=-b+2 -b=3-2 -b=1 b=-1 y=6x-1 ans. ------------------ slope=1/4;(4,3) 3=1/4*4+b 3=1+b b=3-1 b=2 y=x/4+2 ans. ------------------ slope=-2;(0,0) y=-2x ans.

Graphs/168540: 4x^2-28xy+49y^2 1 solutions Answer 124228 by checkley77(12569)   on 2008-11-19 17:23:23 (Show Source): You can put this solution on YOUR website! 4x^2-28xy+49y^2 (2x-7y)(2x-7y)

Graphs/168541: solve each system by grapting 1. 4y=x+2 2x+y=5 1 solutions Answer 124227 by checkley77(12569)   on 2008-11-19 17:14:06 (Show Source): You can put this solution on YOUR website! 4y=x+2 y=x/4+2/4 y=x/4+.5 (red line) 2x+y=5 y=2y-5 (green line). (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions x/4 +.5 and 2y -5).