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checkley71 answered: 8399 problems
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Points-lines-and-rays/41991: This question is from textbook The side of a square is 4 cm longer than a side of an equilateral triangle. The perimeter of the square 24 cm longer than the perimeter of the triangle. Find the lengths of a side of the square and the side of the triangle. 1 solutions Answer 27140 by checkley71(8403)   on 2006-06-13 19:28:19 (Show Source): You can put this solution on YOUR website! THE REASON FOR ADDING THE 24 TO THE TRIANGLE IS BECAUSE IT IS 24 CM SHORT OF THE SQUARES PERIMETER THUS TO BALANCE THE EQUATION YOU MUST EITHER ADD THE 24 TO THE PERIMETER OF THE TRIANGLE OR SUBTRACT 24 FROM THE PERIMETER OF THE SQUARE SO THE TWO EQUATIONS ARE BALANCED. THE 4 SIDES OF THE SQUARE ARE (X+4) AND THE 3 SIDES OF THE TRIANGLE ARE X. THEN THE PERIMETER OF THE SQUARE IS 4(X+4) OR 4X+16 & THE PERIMETER OF THE TRIANGLE 3X & THE SQUARE 4X+16=3X+24 OR 4X-3X=24-16 OR X=8 TRINGLE SIDES=8 & THE SQUARE SIDES ARE 8+4=12 PROOF 3*8=24 PERIMETER OF THE TRIANGLE & 4(8+4)=4*12=48 & 48-24=24 THE DIFFERENCE IN THE TWO PERIMETERS.

Average/41989: Can someone help me solve this problem? I need to find the range of this set of numbers Range = max - min 7, 7, 5, 4, 1, 9, 8, 8, 8, 5, 2 Thank you Lyn 1 solutions Answer 27139 by checkley71(8403)   on 2006-06-13 19:20:22 (Show Source): You can put this solution on YOUR website! 1 2 4 5 5 7 7 8 8 8 9 THE RANGE IS (9-1) OR 8

expressions/41990: Help Solving expressions: I did this to solve 5+(2)^2 /(3-1)*3 5+4 / 2*3 which leaves 9/6 I am confused with the PEMDAS. 1 solutions Answer 27138 by checkley71(8403)   on 2006-06-13 19:18:08 (Show Source): You can put this solution on YOUR website! 5+(2)~2/(3-1)3 or 5+4/2*3 or 9/6 or 1 1/2. Q. WHAT IS THE PEMDAS?

Surface-area/41791: Question A square cardboard of side 20 m has a 4 m border round three of its side (very confusing ?) Find the area of the border. Please help to answer this question. Thank you very much. 1 solutions Answer 27124 by checkley71(8403)   on 2006-06-13 17:03:38 (Show Source): You can put this solution on YOUR website! the border is 24*4+24*4+20*4=4*68=272m~2

Mixture_Word_Problems/41976: My question is below, I feel kind of dumb asking it, but it has me puzzled. A rectangular swimming pool is surrounded by a concrete border. The swimming pool is 50 meters long and,25 meters wide,and the concrete border is 3 meters all around the pool. A. Find the perimeter I did this by adding all 4 sides 50+ 25+50+ 25= 150 meters. I get lost with the next two questions: b. Find the perimeter of the rectangle formed by the border around the pool Will I add all sides by 3 c. Find the area of the concrete border. do I multiply 3 * 4? 1 solutions Answer 27123 by checkley71(8403)   on 2006-06-13 16:57:24 (Show Source): You can put this solution on YOUR website! 50+6+50+6+25+6+25+6=174 meters for the perimeter of the border. Because the border is 3 meters wide youn need to add 3 meters to both ends of the length & width.

Linear-systems/41858: Write a system of two equations in two unknowns. Solve the system by using the substitution method. « Bill and Sue together earn $76,433 per year. If Bill earns $15,000 less than twice Sue’s salary, then how much does each person earn per year? » 1 solutions Answer 27121 by checkley71(8403)   on 2006-06-13 16:50:32 (Show Source): You can put this solution on YOUR website! 76433=(2x-15000)+x or 3x=91433 or x=91433/3 or x=30477.67 is Sue's salary & 2*30477.67-15000=45955.33 proof 30477.67+45955.33=76433.00

Money_Word_Problems/41837: This question is from textbook A pay phone is holding a maximum number of 500 coins consisting of nickels, dimes and quarters. The number of quartes is twice the number of dimes. If the value of all the coines is $88.00, how many nickles were in the pay phone? 1 solutions Answer 27014 by checkley71(8403)   on 2006-06-12 23:11:13 (Show Source): You can put this solution on YOUR website! Q+D+N=500 OR 2D+D+N=500 OR 3D+N=500 OR N=500-3D 25*2D+10D+5N=8800 SUB 500-3D FOR N & WE GET 50D+10D+5(500-3D)=8800 OR 60D+2500-15D=8800 OR 45D=6300 OR D=6300/45 OR D=140 140*10=1400 2D=280 OR 280*25=7000 & 500-140-280=80 OR 80*5=400 THUS 1400+7000+400=8800 THERE ARE 280 QUARTERS, 140 DIMES & 80 NICKLES.

Linear-equations/41845: This question is from textbook INTERMEDIATE ALGEBRA Convert to scientific notation: 0.003816 1 solutions Answer 27013 by checkley71(8403)   on 2006-06-12 22:57:29 (Show Source): You can put this solution on YOUR website! .003816 IS 3.816*10~(-3)

Rate-of-work-word-problems/41849: Two machines are turned on at 8 AM. If one can produce 41 items each hour and the other can produce 50 items each hour, at that time will they produce a total of 182 items? 1 solutions Answer 27012 by checkley71(8403)   on 2006-06-12 22:55:18 (Show Source): You can put this solution on YOUR website! 41*50/(41+50)=2050/91 OR 22.53 ITEMS PER HOUR BY BOTH MACHINES. THEREFORE TO GET 182 ITEMS IT WILL REQUIRE 182/22.53 HOURS OR 8.08 HOURS

Human-and-algebraic-language/41859: Using the digits 0,1,2,3,6,7 and 9 and adding sun + fun = swim. I have to put the before metioned digits into the words sun,fun and they should equal swim. I can only use the numbers once and no letter represents two different digits. I don't even know where to start. Please help 1 solutions Answer 27011 by checkley71(8403)   on 2006-06-12 22:49:34 (Show Source): You can put this solution on YOUR website! S MUST BE A 0 OR A 1 IN THE ANSWER. N+N=M 1+1=2 & 3+3=6 & 6+6=12 ARE THE ONLY POSSIBILITIES FOR N&M. U+U=I OR U+U+1 (CARRY IF N=6) THE ONLY COMBINATION I CAN FIND IS 136+936=1072

Polynomials-and-rational-expressions/41860: This question is from textbook The combined resistance of two resistors R1 and R2 in a parallel circuit is given by the formula Rt = 1 over 1/R1 + 1/R2 simplify the formula. Thanks! 1 solutions Answer 27010 by checkley71(8403)   on 2006-06-12 22:24:06 (Show Source): You can put this solution on YOUR website! RT=1/(1/R1+1/R2) OR RT= 1/(R2+R1)/(R1*R2) OR RT=(R1*R2)/(R1+R2)

Probability-and-statistics/41868: This question is from textbook Kevin earned $165.00 interest for 1 year on an investment of $1500.00. At the same rate, what amount of interest would be earned by an investment of $2500.00? Thanks! 1 solutions Answer 27009 by checkley71(8403)   on 2006-06-12 22:15:17 (Show Source): You can put this solution on YOUR website! 165/1500=X/2500 OR 1500X=165*2500 OR X=412,500/1500 OR X=275 WOULD BE HIS INTEREST

Equations/41873: This question is from textbook a pentagon is a five-sided figure.in the pentagon,all five sides are equal and are desigated by s. a. write a formula for the perimeter, p, of this pentagon. b. find the perimeter of the base of the Pentagon building in Washington,D.C., each side of which is 921 feet. i think i know what to do but i wanna make sure im right 1 solutions Answer 27008 by checkley71(8403)   on 2006-06-12 22:10:11 (Show Source): You can put this solution on YOUR website! P=5S P=921*5 OR P=4605 FEET

Miscellaneous_Word_Problems/41877: Work Problems Jenny has bought a new condo. The closing has been set for 45 days from today. The builder estimates that the remaining work on the condo will take about 750 hours to complete. Write a formula that will help determine the number of people the builder must hire to complete the job. In 45 days each worker can work no more than 40 hours a week. please help me??? Thank You so 750/24=31.25 days 40/7=5.71428 hrs per day. 5.71428/31.25=0.1828571 im soo lost her please teach me how to do this??????? 1 solutions Answer 27007 by checkley71(8403)   on 2006-06-12 22:07:14 (Show Source): You can put this solution on YOUR website! 45/7=6.42 WEEKS 6.42*40=257.14285 750/257.14285=2.9 LABORERS OR 750/(45/7)40= LABORERS

real-numbers/41879: How would you write the following numbers in decreasing order: 0, -7, 4, 13/2, -1/18, 0.9? 1 solutions Answer 27006 by checkley71(8403)   on 2006-06-12 21:56:53 (Show Source): You can put this solution on YOUR website! 13/2, 4, .9, 0, -1/18, -7

Equations/41885: please help me solve this equation. find the area of a triangle with a base 3.25 cm and a height of 4.5cm 1 solutions Answer 27004 by checkley71(8403)   on 2006-06-12 21:52:04 (Show Source): You can put this solution on YOUR website! AREA OF A TRIANGLE IS = 1/2BASE*HEIGHT OR (1/2)*3.25*4.5 OR 14.625/2 OR 7.3125 CM~2

Miscellaneous_Word_Problems/41462: Brandon pays $4.95 a month for a long distance telephone service that offers a flat rate on 7 cents per minute. One month his total long distance bill was $10.69. How many minutes of long distance telephone calls were made that month? 1 solutions Answer 26879 by checkley71(8403)   on 2006-06-10 20:56:07 (Show Source): You can put this solution on YOUR website! 4.95+.07X=10.69 OR .07X=5.74 OR X=82 MINUTE

Equations/41602: (2x-3)(x^2-x-1) show work 1 solutions Answer 26876 by checkley71(8403)   on 2006-06-10 20:46:52 (Show Source): You can put this solution on YOUR website! (2X-3)(X~2-X-1) OR 2X~3-2X~2-2X-3X~2-3X+3 OR 2X~3-5X~2-5X+3

Equations/41600: 4x+3=-1 1 solutions Answer 26874 by checkley71(8403)   on 2006-06-10 20:38:23 (Show Source): You can put this solution on YOUR website! 4X+3=-1 OR 4X=-1-3 OR 4X=-4 OR X=-4/4 OR X=-1

Equations/41541: When x number of units are sold, the price of each unit (in dollars) is given by p=-x/2 + 75. Find the unit price when the following quantities are sold. 2, 7, 9, 11 Please help me 1 solutions Answer 26873 by checkley71(8403)   on 2006-06-10 20:36:39 (Show Source): You can put this solution on YOUR website! P=2/2+75 OR P=1+75 OR P=76 P=7/2+75 OR P=3.5+75 OR P=78.5 P=9/2+75 OR P=4.5+75 OR P=79.5 P=11/2+75 OR P=5.5+75 OR P=80.5

Miscellaneous_Word_Problems/41597: s=16t^2 an acorn falls from the top of an oak tree and takes 2 sec. to hit the ground. How high is the tree? 1 solutions Answer 26872 by checkley71(8403)   on 2006-06-10 20:27:25 (Show Source): You can put this solution on YOUR website! S=16*2~2 OR S=16*4 OR S=64

Equations/41599: Five times some number is 10 less than the number. What is the number? 1 solutions Answer 26871 by checkley71(8403)   on 2006-06-10 20:25:19 (Show Source): You can put this solution on YOUR website! 5X=X-10 OR 4X=-10 OR X=-2.5 PROOF 5(-2.5)=-2.5-10 OR -12.5=-12.5

Linear-equations/41593: please help it say use the substitution method to solve the linear system x+2y=-5 4x-3y=2 32-2y=4 x+ 3y=5 3x+y= -2 x+3y=2 1 solutions Answer 26870 by checkley71(8403)   on 2006-06-10 20:21:33 (Show Source): You can put this solution on YOUR website! X=-5-2Y THEN 4(-5-2Y)=2 OR -20-8Y=2 OR -8Y=22 OR Y=-22/8 OR Y=-11/4 X=-5-2(11/4) OR X=-5-22/4 OR X=(-20-22)/4 OR X=-42/4 OR X=-21/2

Linear_Equations_And_Systems_Word_Problems/41513: This question is from textbook A student thinks that the expression (a+b)2 and a2+b2 are equal to one another. How would you explain to the student why this is not so? 1 solutions Answer 26789 by checkley71(8403)   on 2006-06-09 22:07:52 (Show Source): You can put this solution on YOUR website! LET A=3 & B=4 THEN (A+B)2 WOULD BE (3+4)2 OR 7*2=14 3*2+4*2=6+8=14 HOWEVER IF THE 2 IS A POWER THEN (3+4)~2 OR 7~2=49 HOWEVER 3~2+4~2 IS 9+16=25

Money_Word_Problems/41409: Colin invested $24,000, part at 18% and part at 16%. If the total interest at the end of the year is $4,160, how much did he invest at 18%? Thank You!!! 1 solutions Answer 26788 by checkley71(8403)   on 2006-06-09 22:00:36 (Show Source): You can put this solution on YOUR website! .18X+.16(24000-X)=4160 OR .18X+3840-.16X=4160 OR .02X=320 OR X=16000 INVESTED @ 18% & 8000 INVESTED @ 16%

Length-and-distance/41482: Can someone help me with this problem? A tree casts a shadow that measures 5 m. At the same time, a meter stick casts a shadow that is 0.4 m long. How tall is the tree? Thanks, Lyn 1 solutions Answer 26786 by checkley71(8403)   on 2006-06-09 21:49:24 (Show Source): You can put this solution on YOUR website! .4/5=1/X OR .4X=5 OR X=5/.4 OR X=12.5 METERS FOR THE TREE HEIGHT

Equations/41489: complete the ordered pairs so that each is a solution for the given equation. 3x+4y=12 (0, ), (,3/4), (,0), (8/3,) 1 solutions Answer 26785 by checkley71(8403)   on 2006-06-09 21:46:03 (Show Source): You can put this solution on YOUR website! 3X+4Y=12 X=O Y=3 Y=3/4 X=3 Y=0 X=4 X=8/3 Y=1

Miscellaneous_Word_Problems/41503: During the 1998-1999 Junior Hockey League season, the Sharks played 62 games. Together, their wins and losses totaled 55. They tied 13 fewer games than they lost. How many games did they lose that season? 1 solutions Answer 26784 by checkley71(8403)   on 2006-06-09 21:42:11 (Show Source): You can put this solution on YOUR website! 62=W+L+(L-13) & 55=W+L OR 62=55+L-13 OR 62-55+13=L OR L=20 THUS 62=W+20+7 OR W=62-20-7 OR W=35 & T=7

Miscellaneous_Word_Problems/41163: needing help!!! a bank account yields 7 percent interest, compounded annually. if you deposit $1,000 in the account, what will the account balance be after 5 years? 1 solutions Answer 26609 by checkley71(8403)   on 2006-06-07 21:44:55 (Show Source): You can put this solution on YOUR website! I=PRT OR I=1000*.07*5 OR 1000*.35 OR I=350 THIS THE TOTAL WILL BE 1000+350=$1350

Polynomials-and-rational-expressions/41236: This question is from textbook how do you Factor the expresion 16w squared+80w+100 1 solutions Answer 26607 by checkley71(8403)   on 2006-06-07 21:40:45 (Show Source): You can put this solution on YOUR website! 16w~2+80w+100 or 4w~2+20w+25 or (2x+5)(2x+5)=0 or x=-5/2

Polynomials-and-rational-expressions/41196: A picture frame is 20 inches by 12 inches. There are 84inches^2 of the picture showing. Find the width of the frame. ___ inches Thanks 1 solutions Answer 26606 by checkley71(8403)   on 2006-06-07 21:38:50 (Show Source): You can put this solution on YOUR website! 20*12=240 thus (20-x)(12-x)=84 or 240-32x+x~2=84 or x~2-32x+156 or (x-26)(x-6)=0 or x=26 & x=6 inch wide frame proof (20-6)(12-6)=84 or 14*6=84 or 84=84