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# Recent problems solved by 'checkley71'

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 Equations/129129: ben has 16 jellybeans in his bag. he has 8 red ones, 4 green ones and 4 blue ones. what is the minimum number of jellybeams he must take out of his bag to ensure he has one of each color?1 solutions Answer 94424 by checkley71(8403)   on 2008-02-26 11:08:42 (Show Source): You can put this solution on YOUR website!8R+4R+4B BEANS IN THE BAG. IF THE FIRST 4 SELECTED ARE BLUE & THE NEXT 4 ARE GREEN THEN 1 MORE MUST BE SELECTED TO GET A RED ONE. 4+4+1=9 IS THE MINIMUM NUMBER TO GUARANTEE ONE OF EACH.
 Linear_Equations_And_Systems_Word_Problems/129173: This question is from textbook Solve. Two airplanes travel toward each other from cities that are 780km apart at rates of 190km/h and 200 km/h. They started at the same time. In how many hours will they meet?1 solutions Answer 94420 by checkley71(8403)   on 2008-02-26 11:00:36 (Show Source): You can put this solution on YOUR website!190T+200T=780 390T=780 T=780/390 T=2 HOURS THEY WILL MEET.
 Money_Word_Problems/129132: This question is from textbook intermediate algebra One printer can print the paychecks for the employees of a company in 5 min. A second printer can print the checks in 81 min. How long would it take to print the checks with both printers operating? 1 solutions Answer 94419 by checkley71(8403)   on 2008-02-26 10:58:30 (Show Source): You can put this solution on YOUR website!5*81/(5+81) 405/86 4.7 MINUTES TO COMPLETE THE JOB WORKING TOGETHER.
 Linear_Equations_And_Systems_Word_Problems/129170: This question is from textbook Solve. Sarah's two loans totaled \$12,000. One of her loans was at 6% simple interest and the other at 9%. After one year she owed \$855 in interest. What was the amount of each loan. 1 solutions Answer 94416 by checkley71(8403)   on 2008-02-26 10:53:34 (Show Source): You can put this solution on YOUR website!.09X+.06(12,000-X)=855 .09X+720-.06X=855 .03X=855-720 .03X=135 X=135/.03 X=\$4,500 IS THE AMOUNT OF THE LOAN @ 9% 12,000-4,500=\$7,500 AMOUNT OF THE LOAN @ 6%. PROOF .09*4,500+.06*7,500=855 405+450=855 855=855
 Polynomials-and-rational-expressions/129151: I am horrible at word problems. And I am not understanding polynomials or trinomials very well. could someone help me with this problem? The amount of an investment of P dollars for t years at simple interest rate r is given by A = P + Prt. 1.) Rewrite this formula by factoring out the greatest common factor on the right-hand side. 2.) Find A if \$8300 is invested for 3 years at a simple interest rate of 15% thanks so much for the help1 solutions Answer 94413 by checkley71(8403)   on 2008-02-26 10:46:49 (Show Source): You can put this solution on YOUR website!A=P(1+R)^T IS THE FORMULA FOR ANNUAL COMPOUNDING INTEREST. A=8300(1+.15)^3 A=8300(1.15)^3 A=8300*1.52 A=\$12,623.26 IS THE VALUE OF THIS INVESTMENT AFTER 3 YEARS @ 15% COMPOUNDED INTEREST.
 Expressions-with-variables/129169: I am a bit confused about this problem. I am seeing it as a negative 4 (-4). If anyone can tell me if I have performed this expression correct please let me know, thanks! Problem: 2(a-4)-4(-3-2a) (I am seeing a negative 4 outside of the parenthesis here on this first step, am I correct?) Answer that I came up with: 2(a-4)-4(-3-2a) 2a-8+12+8a 2.25=a 1 solutions Answer 94412 by checkley71(8403)   on 2008-02-26 10:36:15 (Show Source): You can put this solution on YOUR website!2(A-4)-4(-3-2A) 2A-8+12+8A 10A+4 2(5A+2) ANSWER. ----------------------- WHERE DO YOU GET THE = SIGN? THERE IS NO = SIGN.
 Expressions-with-variables/129167: I need help with solving equations. I am wondering if I solved this problem correct. If anyone could let me know if I solved this problem correct and let me know, that would be great, thanks! Problem: 0.6(x-50)=18-0.3(40-10x) Answer that I came up with: 6x-300=18-120+30x 6x-300=-138+30x 6x-162=30x -162=24x -6.75=x 1 solutions Answer 94411 by checkley71(8403)   on 2008-02-26 10:32:28 (Show Source): You can put this solution on YOUR website!.6(X-50)=18-.3(40-10X) .6X-30=18-12+3X YOU FORGOT ABOUT THE DECIMAL POINT ON THE .6 & THE .3 ITEMS. .6X-3X=18-12+30 -2.4X=36 X=36/-2.4 X=-15 ANSWER. PROOF: .6(-15-50)=18-.3(40-10*-15) .6*-65=18-.3(40+150) -39=18-.3*190 -39=18-57 -39=-39
 Expressions-with-variables/129141: Hi I have a substitution problem. I think I have the answer ,but I don't think I am doing it correctly.Can you tell me if I am correct and can you show me your way ,the easiest way to do this using the correct answer? Somewhere in the steps, I am messing up. This problem is a handout and not in a book. The problem is: x=3y+7 and 2x+5y=3 The choice of answers are: A) 4,1 B) 6,3 C) 1,-2 D)4,-1 I CHOSE D (4 ,-1) Thankyou so much!1 solutions Answer 94410 by checkley71(8403)   on 2008-02-26 10:22:52 (Show Source): You can put this solution on YOUR website!X=3Y+7 NOW REPLACE X IN THE OTHER EQUATION BY (3Y+7) & SOLVE FOR Y. 2(3Y+7)+5Y=3 6Y+14+5Y=3 11Y=3-14 11Y=-11 Y=-11/11 Y=-1 ANSWER FOR Y. X=3*-1+7 X=-3+7 X=4 ANSWER FOR X. (4,-1) IS THE ANSWER D).
 Square-cubic-other-roots/129136: What is the square root of 400t?1 solutions Answer 94409 by checkley71(8403)   on 2008-02-26 10:17:52 (Show Source): You can put this solution on YOUR website!SQRT(400T)=20SQRT(T) ANSWER.
 decimal-numbers/129155: 1.31 x (o.oo6)1 solutions Answer 94408 by checkley71(8403)   on 2008-02-26 10:14:32 (Show Source): You can put this solution on YOUR website!1.31*.006=.00786 ANSWER.
 Exponents/129166: Divide 3x2y + 6xy2 by xy. 1 solutions Answer 94407 by checkley71(8403)   on 2008-02-26 10:10:59 (Show Source): You can put this solution on YOUR website!(3X^2Y+6XY^2)/XY 3XY(X+2Y)/XY NOW CANCEL OUT THE XY TERMS. 3(X+2Y)
 Exponents/129162: If P = 7y + 2xy - 6x and Q = 5 - 7y, find the value of 3P - 4Q. Please help I am very confused on this one. Please Help Me1 solutions Answer 94406 by checkley71(8403)   on 2008-02-26 10:07:23 (Show Source): You can put this solution on YOUR website!P=7Y+2XY-6X Q=5-7Y THEN: 3P=3(7Y+2XY-6X)=21Y+6XY-18X 4Q=4(5-7Y)=20-28Y NOW SUBTRACT 4Q(20-28Y) FROM 3P(21Y+6XY-18X) 21Y+6XY-18X-(20-28Y) 21Y+6XY-18X-20+28Y 49Y+6XY-18X-20 ANSWER.
 Functions/129157: write the equation of the line whose slope is -3/7 and y-intercept is -4; write the answer in slope-intercept form. I think it is done like this but am not sure. y=(-3/7)x-41 solutions Answer 94405 by checkley71(8403)   on 2008-02-26 10:01:53 (Show Source): You can put this solution on YOUR website!Y=mX+b IS THE LINE EQUATION WHERE m=SLOPE & b=Y INTERCEPT. Y=-3X/7-4 IS THIS LINE EQUATION. RIGHT ON!
 Functions/129159: write the equation of a line whose slope is -2 and passes through (-1,6). write the answer in slope intercept form. This one I have no clue about.1 solutions Answer 94404 by checkley71(8403)   on 2008-02-26 09:58:17 (Show Source): You can put this solution on YOUR website!Y=mX+b WHERE Y & X ARE COORDINATES OF A POINT ON THIS LINE, m=SLOPE & b=Y INTERCEPT. 6=-2*-1+b 6=2+b b=6-2 b=4 FOR THE Y INTERCEPT. THUS THE LINE EQUATION IS: Y=-2X+4
 Numeric_Fractions/129102: The sum of three numbers is 98. The first number is 2/3 of the second, and the second is 5/8 of the third. What is the second number?1 solutions Answer 94371 by checkley71(8403)   on 2008-02-25 21:27:47 (Show Source): You can put this solution on YOUR website!x+y+z=98 x=2y/3 y=5z/8 or 5z=8y or z=8y/5 2y/3+y+8y/5=98 (5*2y+15y+3*8y)/15=98 (10y+15y+24y)/15=98 now cross multiply 49y=15*98 49y=1470 y=1470/49 y=30 the second number. x=2*30/3=60/3=20 for the first number. 30+20+z=98 50+z=98 z=98-50 z=48 the third number.
 Proportions/129099: A stack of 100 nickels is 6.25 inches high. To the nearest cent, how much would a stack of nickels 8 feet high be worth?1 solutions Answer 94369 by checkley71(8403)   on 2008-02-25 21:19:54 (Show Source): You can put this solution on YOUR website!100*.25=\$25 the value of 100 nickels that are 6.25 inches high. 6.25/(8*12)=25/x 6.25x=25*96 6.25x=2400 x=2400/6.25 x=\$384 worth of nickels.
 Divisibility_and_Prime_Numbers/129094: What is the sum of the integers between 1 and 300 that are divisible by 11 and/or 13? 1 solutions Answer 94367 by checkley71(8403)   on 2008-02-25 21:15:34 (Show Source): You can put this solution on YOUR website!11,22,33,44,55,66,77,88,99,110,121,132,143,154,165,176,187,198,209,220,231,242, 253,264,275,286,297 are all the integers divisable by 11. 13,26,39,52,65,78,91,104,117,130,143,156,165,182,195,208,221,234,247,260,273,286,299 are all the integers divisable by 13.
 Graphs/129086: I need to describe the change in y values as i move along the line from left to right across the coorinate plane, and find the slope and y intercept. the problem is -5y=-25x+35.1 solutions Answer 94364 by checkley71(8403)   on 2008-02-25 21:07:41 (Show Source): You can put this solution on YOUR website!-5y=-25x+35 y=-25x/-5+35/-5 y=5x-7 this line has a slope(m)=5 & a y intercept(b)=-7. (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, 5x -7).
 Finance/129087: Gavin purchased three types of meat at the deli totaling 5 lb. He bought 1 1/2 lb of bologna and 2 1/4 lb of ham. How much of the other type of meat die Gavin purchase? 1 solutions Answer 94362 by checkley71(8403)   on 2008-02-25 21:00:58 (Show Source): You can put this solution on YOUR website!1.5+2.25+x=5 3.75+x=5 x=5-3.75 x=1.25 amount of the third type of meat.
 Graphs/129079: solve the system of equations by graphing. Then classify the system as independent, inconsistent, or dependent x+y=4 x-y=21 solutions Answer 94360 by checkley71(8403)   on 2008-02-25 20:56:59 (Show Source): You can put this solution on YOUR website!x+y=4 or y=-x+4 (red line) x-y=2 or -y=-x+2 or y=x-2 (green line) (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -x +4 and x -2). These systems are dependent.
 Graphs/129065: how to solve for y 4y-16=8x1 solutions Answer 94358 by checkley71(8403)   on 2008-02-25 20:47:24 (Show Source): You can put this solution on YOUR website!4Y=8X+16 Y=8X/4+16/4 Y=2X+4 (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, 2x +4).
 Graphs/129069: This question is from textbook Algebra 1 1/2x-2/3=-6 i need to kno how to solve this problem & others like it 1 solutions Answer 94357 by checkley71(8403)   on 2008-02-25 20:37:12 (Show Source): You can put this solution on YOUR website!1/2X-2/3=-6 X/2=-6+2/3 X/2=(-18+2)/3 X/2=-16/3 NOW CROSS MULTIPLY. 3X=-32 X=-32/3 ANSWER. PROOF: -32/3*1/2-2/3=-6 -32/6-2/3=-6 -32/6-4/6=-6 -36/6=-6 -6=-6
 Money_Word_Problems/128985: 2 students have 280\$altogether.If the first one has 2/5 of the sum of the second one What is the sum of money of each student . PLEASE HELPPPPP!!!! 1 solutions Answer 94356 by checkley71(8403)   on 2008-02-25 20:18:19 (Show Source): You can put this solution on YOUR website!X+Y=280 X=2Y/5 (2Y/5)+Y=280 (2Y+5Y)/5=280 7Y=5*280 7Y=1400 Y=1400/7 Y=\$200 FOR THE STUDENT WITH THE MOST MONEY. X=2*200/5=400/5=\$80 FOR THE STUDENT WITH THE SMALLER AMOUNT.
 Graphs/129061: How do i write the equation of a line,in slope-intercept form, with slope 1/2 and y-intercept -9.1 solutions Answer 94352 by checkley71(8403)   on 2008-02-25 19:46:09 (Show Source): You can put this solution on YOUR website!Y=mX+b Y=X/2-9 ANSWER.
 Percentage-and-ratio-word-problems/128991: Can someone please help me with this problem I have tried itand I just don't get the problem. A man buys five DVDs for \$66.34, including 7% sales tax. How much did each DVD cost? 1 solutions Answer 94351 by checkley71(8403)   on 2008-02-25 19:44:31 (Show Source): You can put this solution on YOUR website!66.34-(66.34*.93)=66.34=61.70 IS THE COST OF THE MEAL PRE TAX. 61.70/5=\$12.34 FOR EACH DVD.
 Equations/129052: Can you please help me, I dont understand equations. x+2x+14=5x+2 1 solutions Answer 94349 by checkley71(8403)   on 2008-02-25 19:18:41 (Show Source): You can put this solution on YOUR website!X+2X+14=5X+2 2X+X-5X=2-14 -2X=-12 X=-12/-2 X=6 ANSWER. PROOF: 6+2*6+14=5*6+2 6+12+14=30+2 32=32
 Numbers_Word_Problems/129036: Tom tried to compute the average of his 7 test scores. He mistakenly divided them by 6, which yeilds 84. What is the correct average test score?1 solutions Answer 94347 by checkley71(8403)   on 2008-02-25 19:12:07 (Show Source): You can put this solution on YOUR website!X/6=84 X=6*84 X=504 504/7=72 SHOULD HAVE BEEN THE AVERAGE SCORE.
 Sequences-and-series/129048: find the value of x in 2x-15=2x+151 solutions Answer 94345 by checkley71(8403)   on 2008-02-25 19:04:30 (Show Source): You can put this solution on YOUR website!2X-15=2X+15 2X-2X=15+15 0X=30 NO SOLUTION FOR X.
 Functions/129044: solve for x: 3(x-2)= -4(x+8)+101 solutions Answer 94344 by checkley71(8403)   on 2008-02-25 19:02:33 (Show Source): You can put this solution on YOUR website!3(X-2)=-4(X+8)+10 3X-6=-4X-32+10 3X+4X=-32+10+6 7X=-16 X=-16/7 ANSWER.
 absolute-value/129043: -1/3x-2/3y=-2 where would the two lines meet when you graph it1 solutions Answer 94342 by checkley71(8403)   on 2008-02-25 18:50:19 (Show Source): You can put this solution on YOUR website!WHAT 2 LINES? (EQAUTIONS) ARE YOU TALKING ABOUT? YOU ONLY SHOW ONE FORMULA (LINE).
 Polynomials-and-rational-expressions/129035: I have 2 problems that I am stumped on x^2-xy/y times y^2/2x-2y how do I cancel the GCF ---------------------------------------------------------------------- [(x^2-xy)/y]*[y^2/(2x-2y)] [x(x-y)/y]*[y^2/2(x-y)] now cancel out the (x-y) & one of the y terms. x*y/2=xy/2 answer. 1 solutions Answer 94341 by checkley71(8403)   on 2008-02-25 18:40:28 (Show Source):