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# Recent problems solved by 'checkley75'

checkley75 answered: 3664 problems
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 Graphs/82858: Solve for t: s=18t1 solutions Answer 59446 by checkley75(3666)   on 2007-05-21 16:08:43 (Show Source): You can put this solution on YOUR website!S=18T T=S/18
 Graphs/82856: Write the equation of the line that passes through point (-5, -3) with a slope of 2. 1 solutions Answer 59445 by checkley75(3666)   on 2007-05-21 16:07:52 (Show Source): You can put this solution on YOUR website!Y=mX+b IS THE LINE EQUATION WHERE X&Y ARE A SET OF POINTS & (m)=SLOPE & b=Y INTERCEPT. -3=2*-5+b -3=-10+b b=-3+10 b=7 Y INTERCEPT. THUS THE LINE EQUATION IS: Y=2X+7
 Graphs/82855: Find the x and y intercepts for 2x+3y=161 solutions Answer 59444 by checkley75(3666)   on 2007-05-21 16:03:31 (Show Source): You can put this solution on YOUR website!SET X=0 & SOLVE FOR Y THEN SET Y=0 & SOLVE FOR X THUS: 2*0+3Y=16 3Y=16 Y=16/3 ANSWER FOR THE Y INTERCEPT (0,16/3) 2X+3*0=16 2X=16 X=16/2 X=8 ANSWER FOR THE X INTERCEPT (8,0)
 test/82766: One number is 8 less than another. If 5 times the smaller number minus 2 times the larger number is 14, find the two numbers. I'm confused, Please help...1 solutions Answer 59369 by checkley75(3666)   on 2007-05-20 20:31:34 (Show Source): You can put this solution on YOUR website!X=Y-8 5X-2Y=14 NOW SUBSTITUTE (Y-8) FOR X & SOLVE FOR Y 5(Y-8)-2Y=14 5Y-40-2Y=14 3Y=54 Y=54/3 Y=18 THE LARGER NUMBER. X=18-8 X=10 FOR THE SMALLER NUMBER. PROOF 5*10-2*18=14 50-36=14 14=14
 Proportions/82782: How to write this ratio as a unit rate 150 mi in 3h1 solutions Answer 59368 by checkley75(3666)   on 2007-05-20 20:11:58 (Show Source): You can put this solution on YOUR website!150/3=50 MILES PER HOUR.
 Money_Word_Problems/82777: Adult tickets for a play cost \$17 and child tickets cost \$2. If there were 32 people at the performance and the theater collected \$364 from ticket sales, how many adults and how many children attended the play?1 solutions Answer 59367 by checkley75(3666)   on 2007-05-20 20:10:44 (Show Source): You can put this solution on YOUR website!A+C=32 THEN C=32-A 17A+2C=364 17A+2(32-A)=364 17A+64-2A=364 15A=364-64 15A=300 A=300/15 A=20 NUMBER OF ADULT TICKETS SOLD. 20+C=32 C=32-20 C=12 NUMBER OF CHILDREN TICKETS SOLD. PROOF 17*20+2*12=364 340+24=364 364=364
 Numeric_Fractions/82769: Change the fraction to a decimal 24/25...How do I do this?1 solutions Answer 59366 by checkley75(3666)   on 2007-05-20 20:02:24 (Show Source): You can put this solution on YOUR website!To convert 24/25 to a decimal you need to divide 24 by 25 the old fashion way: that is long division: Or you can set up an equality to convert this to a fraction with 100 as the denominator: 24/25=x/100 we have multiplied the denominator by 4 therefore we need to multiply the numerator by 4. we then have 4*24=96: thus we have 96/100 which is the same as .96 the decimal equivalent of 24/25.
 Numeric_Fractions/82778: ADD: 7/9+5/61 solutions Answer 59365 by checkley75(3666)   on 2007-05-20 19:52:32 (Show Source): You can put this solution on YOUR website!7/9+5/6 find a common denominator so we can add these fractions: 18 is the lowest common denominator so we have 14/18+15/18=29/18=1 11/18
 Graphs/82780: Write the equation of the line with slope 4 and y intercept (0,-5). Then graph the line. Can someone please help me with this...Thanks1 solutions Answer 59364 by checkley75(3666)   on 2007-05-20 19:49:19 (Show Source): You can put this solution on YOUR website!THE LINE FORMULA IS Y=mX+b WHERE (m)=SLOPE & b=Y INTERCEPT. SUBSTITUTING THE X & Y VALUES & THE SLOPE WE SOLVE FOR THE Y INTERCEPT (b) -5=4*0+b -5=b THIS IS THE Y INTERCEPT: Y=4X-5 IS THIS LINE EQUATION: (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = 4x -5).
 test/82779: Multiply: (-6)(9)1 solutions Answer 59363 by checkley75(3666)   on 2007-05-20 19:44:37 (Show Source): You can put this solution on YOUR website!-6*9=-54 rules of multiplication & division are:(+*+)=+, (-*-)=+, (+*-)=-, (+*-)=-
 Linear-equations/82759: Find the slope -6x-9y=12...Please help1 solutions Answer 59362 by checkley75(3666)   on 2007-05-20 19:41:47 (Show Source): You can put this solution on YOUR website!-6x-9y=12 -9y=6x+12 y=6x/-9+12/-9 y=-2x/3-4/3 (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = -2x/3 -4/3).
 Polynomials-and-rational-expressions/82697: find the values of each of these polynomials for the given values -x2-5x-6 x=-3 x=-21 solutions Answer 59346 by checkley75(3666)   on 2007-05-20 15:53:02 (Show Source): You can put this solution on YOUR website!-x^2-5x-6 -(-3)^2-5(-3)-6 -9+15-6=0 answer. --------------------- -(-2)^2-5(-2)-6 -4+10-6=0 answer.
 Signed-numbers/82732: 3/4(-2/5)-(-3/5)1 solutions Answer 59345 by checkley75(3666)   on 2007-05-20 15:49:05 (Show Source): You can put this solution on YOUR website!3/4*(-2/5)+3/5 -6/20+3/5 -6/20+12/20 6/20=3/10
 Surface-area/82453: Find the surface area of a cylinder. ROUND TO THE NEAREST TENTH. 1.) r= 6.5 m , h= 15 m 2.) d= 8.7 in , h= 7.3 in1 solutions Answer 59344 by checkley75(3666)   on 2007-05-20 15:44:48 (Show Source): You can put this solution on YOUR website!1)TSA=(2pi*r*h)+(2pir^2) TSA=(2*3.14*6.5*15)+(2*3.14*6.5^2) TSA=2112.3+265.33 TSA=2377.63 m^2 -------------------------------- 2)TSA=(pi*d*h)+(2pir^2) TSA=(3.14*8.7*7.3)+(2*3.14*7.3^2) TSA=199.42+334.66 TSA=534.08 in^2
 Linear-equations/82686: Please Graph the following two linear equations y= -4x+1 and y= -4x-101 solutions Answer 59340 by checkley75(3666)   on 2007-05-20 15:29:48 (Show Source): You can put this solution on YOUR website!y=-4x+1 (red line) y=-4x-10 (green line) (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = -4x +1 and y = -4x -10).
 Complex_Numbers/82729: Please sove 4x^2-6x+2=01 solutions Answer 59337 by checkley75(3666)   on 2007-05-20 15:25:36 (Show Source): You can put this solution on YOUR website!4X^2-6X+2 (2X-2)(X-2) 2(X-1)(X-2)
 Polynomials-and-rational-expressions/82700: The cost in dollars of manufacturing w wing nuts is given by the expression 0.07w+13.3. find the cost when 375 wing nuts are made. what is the average cost to manufacture one wing nut?1 solutions Answer 59335 by checkley75(3666)   on 2007-05-20 15:23:01 (Show Source): You can put this solution on YOUR website!0.07W+13.3=0.07*375+13.3=26.25+13.3=39.55 COST OF 375 WING NUTS. THUS THE COST PER WING NUT IS: 39.55/375=.105 FOR EACH WING NUT.
 Polynomials-and-rational-expressions/82704: write in scientific notation (6x10^12)(3.2x10^8) ___________________ (1.6x10^7)(3x10^2)1 solutions Answer 59333 by checkley75(3666)   on 2007-05-20 15:19:30 (Show Source): You can put this solution on YOUR website!(6*10^12)(3.2*10^8)/(1.5*10^7)(3*10^2) (19.2*10^20)/(4.5*10^9) [DIVIDE 19.2 BY 4.5 & SUBTRACT 9 FROM 20 FOR THE EXPONENT FOR THE POWER OF 10: 19.2/4.5=4.26666 & 20-9=11 SO WE NOW HAVE 4.26666*10^11
 Polynomials-and-rational-expressions/82717: find each of the following squares (w-1/4)^21 solutions Answer 59327 by checkley75(3666)   on 2007-05-20 15:13:02 (Show Source): You can put this solution on YOUR website!(W-1/4)^2=W^2-1/2W+1/16
 Polynomials-and-rational-expressions/82719: find each of the following products a(a+5)(a-5)1 solutions Answer 59325 by checkley75(3666)   on 2007-05-20 15:11:12 (Show Source): You can put this solution on YOUR website!A+5 A MULTIPLY ------------------- A^2+5A A-5 MULTIPLY ------------------------- A^3+5A^2-5A^2-25A NOW COMBINE LIKE TERMS A^3-25A
 Polynomials-and-rational-expressions/82727: how do I factor this x^2+25x+241 solutions Answer 59322 by checkley75(3666)   on 2007-05-20 15:06:42 (Show Source): You can put this solution on YOUR website!X^2+25X+24 YOU NEED TO FIND 2 FACTORS OF 24 THAT ADD UP TO 25 (BOTH b & c TERMS ARE POSITIVE): FACTORS FOR 24 ARE 1&24,2&12,3&8,4&6. THE ONLY SET THAT ADDS UP TO 25 ARE 1&24. THEREFORE THE SOLUTION IS: (X+24)(X+1)
 Polynomials-and-rational-expressions/82721: a square has sides of length 3x-2cm. express the area of the square as a polonomial. top is 3x-2cm and right side is 3x-2cm if that helps.1 solutions Answer 59321 by checkley75(3666)   on 2007-05-20 15:02:19 (Show Source): You can put this solution on YOUR website!area of a square=s*s where s=(3x-2). thus we have A=(3X-2)(3X-2) A=9X^2-6X+4
 Exponential-and-logarithmic-functions/82726: simplify (4)to the power of-5/21 solutions Answer 59320 by checkley75(3666)   on 2007-05-20 14:59:09 (Show Source): You can put this solution on YOUR website!4^(-5/2) 1/4^(5/2) 1/sqrt(4^5) 1/sqrt1024 1/32
 Radicals/82725: This problem is not from a textbook. I apologize for writing this all out in words. I don't know how to get the radical sign to appear here. ( I will try to also put this in symbol form by using a capital 'V' to stand for the radical) 3 times the square root of 5/12 plus the square root of 12/5 - 1/3 times the square root of 60. 3 V5/12 + V12/5 - 1/3 V601 solutions Answer 59319 by checkley75(3666)   on 2007-05-20 14:55:11 (Show Source): You can put this solution on YOUR website!3sqrt5/12+sqrt12/5-1/3sqrt60 3sqrt5/12+sqrt12/5-1/3*2sqrt15 3sqrt5/12+sqrt12/5-2/3sqrt15 this is all the reductions. ---------------------------------------------------------------------- if you need to solve the radicals then: 3*.6455+1.549-2.582 1.9365+1.549-2.2582=1.2273 answer.
 Polynomials-and-rational-expressions/82723: perform the indicated divisions x^2-2x-35 divided by x+51 solutions Answer 59318 by checkley75(3666)   on 2007-05-20 14:48:58 (Show Source): You can put this solution on YOUR website!(x^2-2x-35)/(x+5) (x-7)(x+5)/(x+5) cancelling out the (x+5) terms we have: x-7
 Quadratic_Equations/82385: Given f(x) = –4x + 5, find f(–4).1 solutions Answer 59253 by checkley75(3666)   on 2007-05-19 16:50:56 (Show Source): You can put this solution on YOUR website!F(X)=-4X+5 F(-4)=-4*-4+5 F(-4)=16+5 F(-4)=21 ANSWER.
 Quadratic_Equations/82403: The length of a rectangle is 4 in. more than twice its width. If the perimeter of the rectangle is 56 in., find the width of the rectangle. Answer: The width is ______ 1 solutions Answer 59251 by checkley75(3666)   on 2007-05-19 16:49:06 (Show Source): You can put this solution on YOUR website!L=2W+4 P=2L+2W THUS 56=2(2W+4)+2W 56=4W+8+2W 56=6W+8 6W=56-8 6W=48 W=48/6 W=8 IS THE WIDTH PROOF 56=2(2*8+4)+2*8 56=2(16+4)+16 56=2*20=16 56=40+16 56=56
 Quadratic_Equations/82404: Solve the system by substitution. 2x + 2y = 14 y = –3x + 9 Hint: You must find both the x and the y values for full credit. 1 solutions Answer 59250 by checkley75(3666)   on 2007-05-19 16:45:31 (Show Source): You can put this solution on YOUR website!y=-3x+9 now substitute (-3x+9) for y in the other equation & solve for x. 2x+2(-3x+9)=14 2x-6x+18=14 -4x=14-18 -4x=-4 x=-4/-4 x=1 answer. y=-3*1+9 y=-3+9 y=6 answer. proof 6=-3*1+9 6=-3+9 6=6
 Quadratic_Equations/82405: Solve the system by addition or substitution. –6x + 3y = 12 y = 2x + 3 1 solutions Answer 59249 by checkley75(3666)   on 2007-05-19 16:41:45 (Show Source): You can put this solution on YOUR website!y=2x+3 now substitute (2x+3) for y in the other equation & solve for x. -6x+3(2x+3)=12 -6x+6x+9=12 0x=12-9 0=3 now common solution here. proof we plot the 2 lines y=2x+3 (red line) & 3y=6x+12, y=6x/3+12/3, y=2x+4 (green line) (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = 2x +3 and y = 2x +4).
 Divisibility_and_Prime_Numbers/82425: divide 7.2 by 0.06. 1 solutions Answer 59248 by checkley75(3666)   on 2007-05-19 16:34:15 (Show Source): You can put this solution on YOUR website!7.2/.06=120 to make it a little bit easier to solve multiply both numerator & denominator by 100 (100/100=1 & doesn't change the relationship) 720/6=120
 Exponents/82444: Multiply 10u^6 * 4u^51 solutions Answer 59247 by checkley75(3666)   on 2007-05-19 16:30:50 (Show Source): You can put this solution on YOUR website!10u^6*4u^5=40u^11 (multiply the numbers & add the exponents).