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# Recent problems solved by 'checkley71'

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 Angles/108445: This question is from textbook geometry cross braces are often in the framing of a house. If one angle is 131.5 degree, what is the b angle1 solutions Answer 79092 by checkley71(8403)   on 2007-11-06 21:13:14 (Show Source): You can put this solution on YOUR website!180-131.5=48.5 IS THE OPPOSITE ANGLE.
 Graphs/108446: Amelia chose 3 cds that each cost \$16. The sales tax on the three cds is \$3.96. Write a direct variation equation relating sales tax to the price.1 solutions Answer 79091 by checkley71(8403)   on 2007-11-06 21:11:29 (Show Source): You can put this solution on YOUR website!3.96/3=1.32 IS THE TAX ON EACH 16.00 CD. THUS THE TAX IS 1.32/16.00=.0825 OR 8.25% SALES TAX.
 Surface-area/108451: Mitchell is building a 6-foot square wooden deck for his tree house. He will use 3/4 inch thick pine planks that are 8 feet long and six inches wide. His carpenter's plans warn him to not use pieces less than 3 feet long for the deck. How many planks must Mitchell buy to make the tree house deck? I am in 5th grade and I can't figure this one out. Even my parents have worked on it and they can't figure it out. 1 solutions Answer 79085 by checkley71(8403)   on 2007-11-06 21:01:22 (Show Source): You can put this solution on YOUR website!6 FEET=6*12=72 INCHES NEED TO BE FILLED WITH 6 INCH PLANKS. 72/6=12 PLANKS BECAUSE HE CAN ONLY GET ONE 6 FOOT PLANK FROM EACH PIECE DUE TO HIS INABILITY TO USE THE 2 FOOT PIECE.
 Trigonometry-basics/108449: Arrange in order from smallest to largest. 2.05, 25/10, 2.0513, 2.059, 251/100, 2.0515, 2.052, 2.051 Can someone please help me. Once again I do not even no where to start. (the 25/20 and 251/100 are fractions.) 1 solutions Answer 79081 by checkley71(8403)   on 2007-11-06 20:54:18 (Show Source): You can put this solution on YOUR website!2.0500, 2.5000, 2.0513, 2.0590, 2.5100, 2.0515, 2.0520, 2.0510 ALL CONVERTED TO DECIMALS WIUTH THE SAME NUMBER OF DIGITS. 2.0500, 2.0510, 2.0513, 2.0515, 2.0520, 2.0590, 2.5000, 2.5100 ANSWER.
 Trigonometry-basics/108447: Write the following as a common fraction or mixed number. 4.0171 Can someone please help me with this?1 solutions Answer 79080 by checkley71(8403)   on 2007-11-06 20:46:34 (Show Source): You can put this solution on YOUR website!4.0171=40171/10000 ANSWER.
 Rational-functions/108444: Solve each system by elimination: 4x-3y=-2 4x+5y=141 solutions Answer 79079 by checkley71(8403)   on 2007-11-06 20:43:00 (Show Source): You can put this solution on YOUR website!4X-3Y=-2 4X+5Y=14 NOW SUBTRACT --------------------------------------- -8Y=-16 Y=-16/-8 Y=2 ANSWER. 4X-3*2=-2 4X-6=-2 4X=-2+6 4X=4 X=4/4 X=1 ANSWER.PROOF 4*1+5*2=14 4+10=14 14=14
 Distributive-associative-commutative-properties/108419: p-3(p-4)=2+(2p+5)1 solutions Answer 79077 by checkley71(8403)   on 2007-11-06 20:33:10 (Show Source): You can put this solution on YOUR website!P-3(P-4)=2+(2P+5) P-3P+12=2+2P+5 P-3P-2P=2+5-12 -4P=-5 P=-5/-4 P=5/4 ANSWER. PROOF 5/4-3(5/4-4)=2+(2*5/4+5) 5/4-15/4+12=2+10/4+5 -10/4+12=2+2.5+5 -2.5+12=9.5 9.5=9.5
 Finance/108442: 23x+10-4x+541 solutions Answer 79075 by checkley71(8403)   on 2007-11-06 20:27:52 (Show Source): You can put this solution on YOUR website!23X+10-4X+54 19X+64 ANSWER.
 Expressions-with-variables/108420: im not sure if im doing my problems correctally here is one if them, c/-59=-7 the first set of numbers being a fraction1 solutions Answer 79074 by checkley71(8403)   on 2007-11-06 20:18:09 (Show Source): You can put this solution on YOUR website!A SIMPLIER EXAMPLE IS: 1/2=2/4 NOW CROSS MULTIPLY. NUMERATOR OF THE LEFT FRACTION*THE DENOMINATOR OF THE RIGHT FRACTION (1*4)=THE NUMERATOR OF THE RIGHT FRACTION*THE DENOMINATOR OF THE LEFT FRACTION (2*2). 1*4=2*2 4=4 -------------------------------------------------- C-59=-7/1 NOW CROSS MULTIPLY 1C=-7*-59 1C=413 ANSWER.
 Rational-functions/108441: Solve each system by elimination: -x+3y=-1 x-2y=21 solutions Answer 79073 by checkley71(8403)   on 2007-11-06 20:15:57 (Show Source): You can put this solution on YOUR website!-X+3Y=1 X-2Y=2 NOW ADD. --------------------------- Y=3 ANSWER. -X+3*3=1 -X+9=1 -X=1-9 -X=-8 X=8 ANSWER. PROOF 8-2*3=2 8-6=2 2=2
 Complex_Numbers/108428: (8-6i)/3i (simplify)1 solutions Answer 79072 by checkley71(8403)   on 2007-11-06 20:14:17 (Show Source): You can put this solution on YOUR website!(8-6i)/3i MULTIPLYING NUMERATOR & DENOMINATOR BY 3i WE GET 3i(8-6i)/3i*3i (24i-18i^2)/9i^2 (24i+18)/-9 6(4i+3)/-9 -2(4i+3)/3 -2/3(4i+3)
 Rational-functions/108437: Solve each system by elimination: -x+3y=-1 x-2y=21 solutions Answer 79070 by checkley71(8403)   on 2007-11-06 20:07:30 (Show Source): You can put this solution on YOUR website!-X+3Y=1 X-2Y=2 NOW ADD. --------------------------- Y=3 ANSWER. -X+3*3=1 -X+9=1 -X=1-9 -X=-8 X=8 ANSWER. PROOF 8-2*3=2 8-6=2 2=2
 Functions/108440: This question is from textbook algebra 1 I'm not sure how to answer this problem. Can you help me? The problem is y= x+7 x= (-3) Thamk you if you find the answer? Thank you for trying if you don't.1 solutions Answer 79069 by checkley71(8403)   on 2007-11-06 20:04:43 (Show Source): You can put this solution on YOUR website!Y=X+7 & X=-3 NOW REPLACE (-3) FOR X IN THE FIRST EQUATION Y=-3+7 Y=+4 ANSWER. PROOF 4=-3+7 4=4
 Number-Line/108439: This question is from textbook SAXON MATH 7/6 The question is: On a number line,the square root of 60 is between which two consequtive numbers? I got in between 7&8 because 7*7=49 and 8*8=64 and they are in between60.Is that right? Thank You1 solutions Answer 79068 by checkley71(8403)   on 2007-11-06 20:02:19 (Show Source): You can put this solution on YOUR website!SQRT60=7.74 THIS NUMBER LIES BETWEEN 7 & 8 ON A NUMBERED LINE.
 Exponents/108434: This question is from textbook SAXON MATH 7/6 The question is:Write prime factorization of 225 using exponents. I got 15 cause 15*15=225 thank you1 solutions Answer 79066 by checkley71(8403)   on 2007-11-06 19:59:35 (Show Source): You can put this solution on YOUR website!HOW ABOUT 3^2*5^2
 Unit_Conversion_Word_Problems/108430: RAY HAS \$7.60 IN QUARTERS AND DIMES. IN ALL, HE HAS 40 COINS. HOW MANY COINS OF EACH KIND DOES HE HAVE?1 solutions Answer 79065 by checkley71(8403)   on 2007-11-06 19:56:52 (Show Source): You can put this solution on YOUR website!D+Q=40 OR D=40-Q .10D+.25Q=7.60 .10(40-Q)+.25Q=7.60 4-.10Q+.25Q=7.60 .15Q=7.60-4 .15Q=3.60 Q=3.60/.15 Q=24 NUMBER OF QUARTERS 40-24=16 NUMBER OF DIMES. PROOF .10*16+24*.25=7.60 1.60+6=7.60 7.60=7.60
 Radicals/108432: Hello out there,I need some help with some tough problems,the first one is,Simplify:(S.ROOT)9ab^4.The next one is,Simplify:(S.ROOT)500.The third one is,Simplify:(S.ROOT)9(S.ROOT)4.And the last one is,Simplify:(S.ROOT)56/(S.ROOT)8,Thanks to whoever can help.1 solutions Answer 79061 by checkley71(8403)   on 2007-11-06 19:51:38 (Show Source): You can put this solution on YOUR website!sqrt(9ab^4)=3b^2sqrt(a) sqrt500=sqrt100*5=10sqrt(5) sqrt9*sqrt4=3*2=6 sqrt56/sqrt8=sqrt(8*7)/sqrt8=sqrt(7)
 Coordinate-system/108429: This question is from textbook McDougal Littell Algebra 1 what is y when (2, -15), (5, y), m= 4/51 solutions Answer 79060 by checkley71(8403)   on 2007-11-06 19:46:12 (Show Source): You can put this solution on YOUR website!4/5=.8 m=(y2-y1)/x2-x1) .8=(y+15)/(5-2) .8=(y+15)/3 now cross multiply y+15=3*.8 y+15=2.4 y=2.4-15 y=12.6 answer. proof .8=(12.6-15)/(5-2) .8=2.4/3 .8=.8
 Equations/108426: how do you solve : 2x-6y=-16 5x+7y=-181 solutions Answer 79058 by checkley71(8403)   on 2007-11-06 19:14:44 (Show Source): You can put this solution on YOUR website!multiply the first equation by 5 10x-30y=-80 now multiply the second equation by -2 -10x-14y=36 now add these two equations 10x-30y=-80 -10x-14y=36 -------------------------- -44y=-44 y=-44/-44 y=1 answer 2x-6*1=-16 2x-6=-16 2x=-16+6 2x=-10 x=-10/2 x=-5 answer. proof 5*-5+7*1=-18 -25+7=-18 -18=-18
 Linear_Equations_And_Systems_Word_Problems/108211: The cost of bananas varies directly with their weight. Miguel bought 3 1/2 pounds of bananas for \$1.12. Write an equation that relates the cost of the bananas to their weight. Then find the cost of 4 1/4 pounds of bananas.1 solutions Answer 79057 by checkley71(8403)   on 2007-11-06 19:07:43 (Show Source): You can put this solution on YOUR website!3.5/1.12=4.25/x now cross multiply 3.5x=1.12*4.25 3.5x=4.76 x=4.76/3.5 x=1.36 cost of 4.25 pounds of bananas
 Travel_Word_Problems/108213: ron and doug leave the same point at the same time traveling in cars going in oppisite directions. ron travels at 40 miles per hour and doug travels at 60 miles per hour. in how many hours will the be 450 miles apart?1 solutions Answer 79056 by checkley71(8403)   on 2007-11-06 19:02:40 (Show Source): You can put this solution on YOUR website!40t+60t=450 100t=450 t=450/100 t=4.5 hours is the answer. proof 40*4.5+60*4.5=450 180+270=450 450=450
 expressions/108246: This question is from textbook Algebra 1 Beatriz is in charge of setting up a banquet hall. She has 5 tables that will seat 6 people each. if no more than 62 people will attend, how many tables seating 4 people each will she need?1 solutions Answer 79055 by checkley71(8403)   on 2007-11-06 18:59:53 (Show Source): You can put this solution on YOUR website!5*6=30 people seated at these tables that leaves 62-30=32 to be seated at the 4 people tables. thus she'll need 32/4=8 table to seat the remaing 32 people.
 Geometry_Word_Problems/108306: The length of a rectangle is 2 cm more than twice its width. If the perimeter of the rectangle is 52 cm, find the dimensions of the rectangle. 1 solutions Answer 79054 by checkley71(8403)   on 2007-11-06 18:54:02 (Show Source): You can put this solution on YOUR website!l=2w+2 perimeter=2l+2w 52=2(2w+2)+2w 52=4w+4+2w 6w=52-4 6w=48 w=48/6 w=8 cm. l=2*8+2 l=16+2 l=18 cm. proof 52=2*18+2*8 52=36+16 52=52