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# Recent problems solved by 'checkley77'

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 Travel_Word_Problems/138389: The moon has a surface of approximately 14,650,000 mi2? Estimate its radius to the nearest mile. My textbook ISBN is: 0-13-180915-6. Practice 11-1.1 solutions Answer 101049 by checkley77(12569)   on 2008-04-24 15:51:27 (Show Source): You can put this solution on YOUR website!4PIR^2 IS THE TOTAL SURFACE AREA OF A SPHERE. 14,650,000=4*3.14*R^2 14,650,000=12.56R^2 R^2=14,650,000/12.56 R^2=1,166,401.2 R=SQRT(1,166,401.2) R=1,080 MILES IS THE RADIUS.
 Rectangles/138354: jack is building a rectangular dog pen that he wishes to enclose. the width of the pen is 2 yards less than the length. if the area of the of the dog pen is 15 square yards, how many yards of fencing would he need to completely enclose the pen?1 solutions Answer 101047 by checkley77(12569)   on 2008-04-24 15:45:23 (Show Source): You can put this solution on YOUR website!W=L-2 L*(L-2)=15 L^2-2L-15=0 (L-5)(L+3)=0 L-5=0 L=5 ANSWER FOR THE LENGTH W=5-2=3 ANSWER FOR THE WIDTH. PROOF: 5*3=15 15=15 THEREFORE THE PERIMETER OF THIS PEN IS: 2*3+2*5 6+10=16 YARDS OF FENCING IS NEEDED.
 Money_Word_Problems/138364: Pablo invested \$445,000 in two bonds. The first bond paid 3% interest per year and the second 8% per year. The total interest pablo received in one year was \$2850. How much did he invest in each bond?1 solutions Answer 101044 by checkley77(12569)   on 2008-04-24 15:30:00 (Show Source): You can put this solution on YOUR website!.08x+.03(45,000-x)=2,850 .08x+1,350-.03x=2,850 .05x=2850-1,350 .05x=1,500 x=1,500/.05 x=30,000 A VALID ANSWER. PROOF: .08*30,000+.03(45,000-30,000)=2,850 2,400+.03*15,000=2,850 2,400+450=2,850 2,850=2,850
 Polynomials-and-rational-expressions/138372: (u^8z^7) over z^-3u^-2 How do I simplify?1 solutions Answer 101043 by checkley77(12569)   on 2008-04-24 15:19:29 (Show Source): You can put this solution on YOUR website!(u^8z^7) over z^-3u^-2 (u^8z^7)(z6^3u^2)negative exponents in the denominator become positive exponents when moved to the numerator. u^10z^10 answer.
 Polynomials-and-rational-expressions/138373: How would I simplify? -(3a^6b^4)^31 solutions Answer 101042 by checkley77(12569)   on 2008-04-24 15:16:04 (Show Source): You can put this solution on YOUR website!-(3a^6b^4)^3 -(27A^18B^12) -27A^18B^12 ANSWER.
 Numbers_Word_Problems/138378: The sum of two numbers is 20. Their difference is 4. Find the two numbers. 1 solutions Answer 101040 by checkley77(12569)   on 2008-04-24 15:14:03 (Show Source): You can put this solution on YOUR website!X+Y=20 X-Y=4 X=Y+4 (Y+4)+Y=20 2Y=20-4 Y=16/2 Y=8 ANSWER. X-8=4 X=4+8 X=12 ANSWER. PROOFS: 8+12=20 20=20 8-4=4 4=4
 absolute-value/138384: This question is from textbook 3x + 6 = x + 21 solutions Answer 101038 by checkley77(12569)   on 2008-04-24 15:10:59 (Show Source): You can put this solution on YOUR website!3X+6=X+2 3X-X=2-6 2X=-4 X=-4/2 X=-2 PROOF 3*-2+6=-2+2 -6+6=0 0=0
 percentage/138379: At the time of her grandsons birth, a grandmother deposits 4000 in an account that pays 6.5% compounded monthly. What will be the value of the account at the child's twenty-first birthday, assuming that no other withdrawls or deposits were made during this period? thanks u 1 solutions Answer 101036 by checkley77(12569)   on 2008-04-24 15:09:01 (Show Source): You can put this solution on YOUR website!4000(1+.065/12)^21*12 4000(1+0054)^252 4000(1.0054)^252 4000*3.9 \$15,605 answer.
 Polynomials-and-rational-expressions/138382: interest is compounded semiannually. Find the amount in the account after the given time: Principal Rate of interest Time \$2000 5% 3 years 1 solutions Answer 101033 by checkley77(12569)   on 2008-04-24 15:03:58 (Show Source): You can put this solution on YOUR website!2000(1+.05/2)^3*2 2000(1.025)^6 2000*1.15969 \$2,319.39 answer.
 Polynomials-and-rational-expressions/138381: after martha tumble began her job as an editor, she invested in a money market account paying 4.3% interest compounded daily (n=360). What was the effective annual yeild of this account? 1 solutions Answer 101032 by checkley77(12569)   on 2008-04-24 14:59:36 (Show Source): You can put this solution on YOUR website!(1+.043/360)^360 (1+.0001194)^360 1.0001194^360 1.0439 or the annual yield would be 4.39%.
 percentage/138380: HELP!!! use the compounded interest formula above to compute the total amount after 3000 is invested at 4% over 2 years compounded daily. (use n = 360) 1 solutions Answer 101031 by checkley77(12569)   on 2008-04-24 14:55:34 (Show Source): You can put this solution on YOUR website!3000(1+.04/360)^2*360 3000(1+.0001111)^720 3000(1.0001111)^720 3000*1.08327 \$3249.82 answer.
 Quadratic_Equations/138266: xsquared - 11x + 24 1 solutions Answer 101014 by checkley77(12569)   on 2008-04-24 10:12:37 (Show Source): You can put this solution on YOUR website!x^2-11x+24 (x-8)(x-3) answer.
 Equations/138285: 7.8 + C = 9.41 solutions Answer 101013 by checkley77(12569)   on 2008-04-24 10:09:23 (Show Source): You can put this solution on YOUR website!7.8+C=9.4 C=9.4-7.8 C=1.6 ANSWER.
 Distributive-associative-commutative-properties/138304: difference of two negative integers is 8? find the integers?1 solutions Answer 101012 by checkley77(12569)   on 2008-04-24 10:07:15 (Show Source): You can put this solution on YOUR website!there are many solutions to this problem. examples: -2-(-10)=-2+10=8 -47-(-55)=-47+55=8 -450-(-458)=-450+458=8
 Proportions/138311: This question is from textbook 100 nautical miles equals about 115 statute miles. About how far in nautical miles is 50 statute miles? Round to the nearest whole number1 solutions Answer 101011 by checkley77(12569)   on 2008-04-24 10:02:10 (Show Source): You can put this solution on YOUR website!100/115=x/50 115x=100*50 115x=5000 x=5000/115 x=43 nautical miles.
 Equations/138241: 4x+5y=-16 -2x+5y=12 Solve for x and y.1 solutions Answer 100978 by checkley77(12569)   on 2008-04-23 21:22:56 (Show Source): You can put this solution on YOUR website!4x+5y=-16 -2x+5y=12 MULTIPLY THIS EQUATION BY 2 & ADD THEM. -4X+10Y=24 4X+5Y=-16 --------------------------- 15Y=8 Y=8/15 ANSWER. 4X+5(8/15)=-16 4X40/15=-16 4X=-16-40/15 4X=-16-8/3 4X=(-16*3-8)/3 4X=(-48-8)/3 4X=-56/3 X=-56/3*1/4 X=-56/12 X=-14/3 ANSWER.
 Polynomials-and-rational-expressions/138260: This question is from textbook Glencoe Mathmatics (ab4)(ab2)1 solutions Answer 100976 by checkley77(12569)   on 2008-04-23 21:14:10 (Show Source): You can put this solution on YOUR website!(AB^4)(AB^2)=A^2B^6 ANSWER.
 expressions/138132: Please evaluate the expression: [4-(-2)^3]/(-3-1) where ^ means to the power of. Thanxs very much.1 solutions Answer 100975 by checkley77(12569)   on 2008-04-23 21:12:44 (Show Source): You can put this solution on YOUR website![4-(-2)^3]/(-3-1) [4-(-8)]/-4 [4+8]/-4 12/-4 -3 ANSWER.
 Linear-equations/138134: Please help with this question: If the sum of two consecutive multiples of 6 is 78, what equation would you write to find the numbers? A) (x+1)+(x+2)=78 B) (x+1)(x+2)=78 C) (x)+(x+6)=78 D) (x)-(x+6)=78 E) None of these Thank you.1 solutions Answer 100974 by checkley77(12569)   on 2008-04-23 21:10:22 (Show Source): You can put this solution on YOUR website!C) IS THE ONLY SOLUTION. X+(X+6)=78 2X+6=78 2X=78-6 2X=72 X=72/2 X=36 FOR THE FIRST NUMBER 46=6=42 FOR TE OTHER NUMBER. PROOF 36+42=78 78=78
 Equations/138153: write it to it's lowest term 11/7 - 6/351 solutions Answer 100972 by checkley77(12569)   on 2008-04-23 21:05:06 (Show Source): You can put this solution on YOUR website!11/7-6/35 (11*5-6)/35 (55-6)/35 49/35=7*7/5*7=7/5 ANSWER.
 expressions/138160: simplify and combine terms -12p+3p1 solutions Answer 100971 by checkley77(12569)   on 2008-04-23 21:01:45 (Show Source): You can put this solution on YOUR website!-12p+3p=-9p ANSWER.
 Graphs/138164: This question is from textbook Algebra II Solve the system by graphing. 2x + y = -4 x-y = 11 solutions Answer 100970 by checkley77(12569)   on 2008-04-23 21:00:03 (Show Source): You can put this solution on YOUR website!2x+y=-4 y=-2x-4 (red line) ------------------------ x-y=1 -y=-x+1 y=x-1 (green line) (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -2x -4 and x -1). ANSWER(-1,-2)
 Polynomials-and-rational-expressions/138166: Write an expression which represents the product of 3 less than twice x and 2 more than the quantity 3 times x.1 solutions Answer 100968 by checkley77(12569)   on 2008-04-23 20:56:02 (Show Source): You can put this solution on YOUR website!(2x-3)(3x+2)
 Graphs/138205: graph the equation y=5x y=10x1 solutions Answer 100963 by checkley77(12569)   on 2008-04-23 20:49:44 (Show Source): You can put this solution on YOUR website!y=5x (red line) y=10x (green line) (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 5x and 10x).
 percentage/138212: During a sale, a dress decreased in price from \$402.73 to \$342.32. Find the percent decrease in the price of the dress1 solutions Answer 100962 by checkley77(12569)   on 2008-04-23 20:47:42 (Show Source): You can put this solution on YOUR website!342.32/402.73=.85 or (1-.85)=15% reduction.
 Proportions/138216: 2. Determine the next three terms that fit the pattern: 3, 7, 17, 27, 44, 71.......115,186,3011 solutions Answer 100961 by checkley77(12569)   on 2008-04-23 20:44:44 (Show Source):
 Linear-equations/138222: y=1/5x1 solutions Answer 100957 by checkley77(12569)   on 2008-04-23 20:33:03 (Show Source): You can put this solution on YOUR website!y=1/5x (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = x/5).
 Distributive-associative-commutative-properties/138230: Please help me with the folowing.... How do you solve for each variable: (x+4)(2x-9)=0 x^2-3x-10=0 4x^2-25=0 10=x^2-9x 9c^2=361 solutions Answer 100956 by checkley77(12569)   on 2008-04-23 20:31:28 (Show Source): You can put this solution on YOUR website!(x+4)(2x-9)=0 x+4=0 x=-4 answer 2x-9=0 2x=9 x=9/2 x=4.5 ------------------------------ x^2-3x-10=0 (x-5)(x=2)=0 x-5=0 x=5 answer. x+2=0 x=-2 answer. ----------------------------------------- I've done the first 2 now you can finish the homework.
 Distributive-associative-commutative-properties/138233: How do you solve for each variable: (x-3)(x-7)=0 b^2+3b-4=0 n^2+n-12=0 5x^2+18x=8 3a^2+4a=2a^2-2a-91 solutions Answer 100955 by checkley77(12569)   on 2008-04-23 20:28:55 (Show Source): You can put this solution on YOUR website!(x-3)(x-7)=0 x-3=0 x=3 answer x-7=0 x=7 answer. ------------------------------------- b^2+3b-4=0 (b+4)(b-1)=0 b+4=0 b=-4 answer. b-1=0 b=1 answer. ------------------------------------------------ Here's 2 solutions. I'll leave the rest of your homework for you to practice on.
 Proportions/138236: i need help with this problem: n-3 n-4 ---=--- n+5 n+31 solutions Answer 100954 by checkley77(12569)   on 2008-04-23 20:24:48 (Show Source): You can put this solution on YOUR website!n-3 n-4 ---=--- n+5 n+3 cross multiply: (n+5)(n-4)=(n-3)(n+3) n^2+n-20=n^2-9 n^2-n^2+n=20-9 n=11 answer.