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Recent problems solved by 'checkley71'

checkley71 answered: 8399 problems
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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 help 1 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 Me 1 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-4 1 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=2 1 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=8x 1 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+15 1 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)+10 1 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 it 1 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): You can put this solution on YOUR website!