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Recent problems solved by 'checkley71'

checkley71 answered: 8399 problems
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Equations/43174: Solve the equation. 1 solutions Answer 28199 by checkley71(8403)   on 2006-06-21 21:16:12 (Show Source): You can put this solution on YOUR website! A/3-1/3=-3 OR (A-1)/3=-3 OR A-1=3*-3 OR A-1=-9 OR A=-9+1 OR A=-8

Graphs/43089: Consider the line y= -7x-6 What is the slope of a line perpendicular to this line? What is the slope of a line parallel to this line? 1 solutions Answer 28122 by checkley71(8403)   on 2006-06-21 15:09:59 (Show Source): You can put this solution on YOUR website! the slope of this line is -7 therefore the perpendicular line has a slope of 1/7 a parrallel line to this line is also -7

Number-Line/43095: Find the median for the following: 1, 12, 45, 34, 21, 60, 15 1 solutions Answer 28121 by checkley71(8403)   on 2006-06-21 15:07:33 (Show Source): You can put this solution on YOUR website! arrange all numbers from the smallest to the largest 1 12 15 21 34 45 60 the median is the middle number or 21

Graphs/43098: Find two consecutive integers such that the sum of 2 times the first integer and 7 times second integer is 88. 1 solutions Answer 28120 by checkley71(8403)   on 2006-06-21 15:04:34 (Show Source): You can put this solution on YOUR website! 2x+7(x+1)=88 or 2x+7x+7=88 or 9x=81 or x=9 prood 2*9+7(10)=88 or 18+70=88 or 88=88

Linear-equations/43102: How do I make this in to a graph? 3x + 2y =6 1 solutions Answer 28119 by checkley71(8403)   on 2006-06-21 15:01:24 (Show Source): You can put this solution on YOUR website! 3x+2y=6 or 2y=-3x+6 or y=-1.5x+3 or this is a line with a slope of -1.5 & passing through the point(0,3)

Polynomials-and-rational-expressions/43099: Can you please help me simplify -5^0 please? Thanks 1 solutions Answer 28117 by checkley71(8403)   on 2006-06-21 14:58:37 (Show Source): You can put this solution on YOUR website! -5~0 is =1

Quadratic_Equations/43106: Which of the ordered pairs (3,1),(0,-4),(-4,0),(-3,-7) are solution for the equation x - y =4? 1 solutions Answer 28116 by checkley71(8403)   on 2006-06-21 14:56:49 (Show Source): You can put this solution on YOUR website! 0,-4 -3,-7 are solutions to x-y=4

Word_Problems_With_Coins/43107: David has collected $6.50 in nickels and dimes. If he has 75 coins, how many of each kind of coin does he have? 1 solutions Answer 28115 by checkley71(8403)   on 2006-06-21 14:54:44 (Show Source): You can put this solution on YOUR website! d+n=75 10d+5n=650 & d=75-n then 10(75-n)+5n=650 750-10n+5n=650 or 100=5n or n=20 & d=75-20 or d=55 proof 10*55+5*20=650 or 550+100=650 or 650=650

Quadratic_Equations/43105: Solve the following systems: 2x - y = 1 6y - 2x = 9 1 solutions Answer 28114 by checkley71(8403)   on 2006-06-21 14:50:54 (Show Source): You can put this solution on YOUR website! y=2x-1 then 6(2x-1)-2x=9 or 12x-6-2x=9 or 10x=15 or x=1.5 then y=2*2.5-1 or y=5-1 or y=4

Money_Word_Problems/42992: A home purchased for $300,000 depreciated 8% over a 1-year period. What was the value of the home after at the end of the year? 1 solutions Answer 28056 by checkley71(8403)   on 2006-06-20 22:39:23 (Show Source): You can put this solution on YOUR website! 300,000*.08=24000 or 300000-24000=276000

Equations/42999: Rewrite the equation -8x-5y=-45 as a function of x 1 solutions Answer 28054 by checkley71(8403)   on 2006-06-20 22:37:11 (Show Source): You can put this solution on YOUR website! -8x-5y=-45 or -8x=5y-45 or x=(5y-45)/-8

Money_Word_Problems/43001: Carla invested $28,000, part at 14% and part at 9%. If the total interest at the end of the year is $3,370, how much did she invest at 14%? 1 solutions Answer 28053 by checkley71(8403)   on 2006-06-20 22:34:58 (Show Source): You can put this solution on YOUR website! .14x+.09(28000-x)=3370 or .14x+2520-.09x=3370 or .05x=850 or x=850/.05 or x=17000 invested @ 14% & 28000-17000=11000 @ 9%

percentage/42998: The following pie chart represents the eye color of students in a certain class. OTHER = 17% BLUE = 33% BROWN = 50% If there were 50 students in the class, how many students had brown eyes? 1 solutions Answer 28049 by checkley71(8403)   on 2006-06-20 22:28:06 (Show Source): You can put this solution on YOUR website! 50% of 50 is .5*50=25 with brown eyes.

Linear-equations/43006: HELP! I am stuck on how to figure out solution sets. For example, I have an equation that goes like this. y= -x + 1 How do I calculate solution sets? 1 solutions Answer 28045 by checkley71(8403)   on 2006-06-20 22:11:19 (Show Source): You can put this solution on YOUR website! make a table of x & y values that satisfy the equation y=-x+1 or x y 0 1 1 0 2 -1 3 -2

Geometry_Word_Problems/43024: The length of a rectangular sign is 3 feet longer than the width. If the sign has an area of 40 square feet for advertising, find its length and width. Can someone show me how to do this? 1 solutions Answer 28044 by checkley71(8403)   on 2006-06-20 22:07:30 (Show Source): You can put this solution on YOUR website! area=length times width or 40=x(x+3) or 40=x~2+3x or x~2+3x-40=0 or (x+8)(x-5)=0 or x=-8 & x=5 so the sides are 5 & 5+3=8

Radicals/43014: Solve the radical expression Please help with this! Sqrt(2x-1) = x - 2 What is in parenthesis is under the sqrt symbol. 1 solutions Answer 28042 by checkley71(8403)   on 2006-06-20 22:03:45 (Show Source): You can put this solution on YOUR website! sqrt(2x-1)=x-2 or squaring both sides we get 2x-1=(x-2)~2 or 2x-1=x~2-4x+4 or x~2-6x+5=0 or (x-5)(x-1)=0 or x=5 & x=1

Radicals/43016: Can someone help me solve the radical expression sqrt3x + 5 = 11 Thank you 1 solutions Answer 28041 by checkley71(8403)   on 2006-06-20 21:59:55 (Show Source): You can put this solution on YOUR website! sqrt3x+5=11 or sqrt3x=11-5 opr sqrt3x=6 or squaring both sides we get 3x=36 or x=36/12 or x=12

Numbers_Word_Problems/43020: I'm trying to double check mt math--Here is my problem: One employee of a retail electronics store is paid a base salary of $1800 a month plus a 2% commission on sales she makes during the month. What were her sales last month if she earned a total of $2,165.46? 1 solutions Answer 28040 by checkley71(8403)   on 2006-06-20 21:56:27 (Show Source): You can put this solution on YOUR website! $2,165.46-$1,800=$365.46 which her commission so .02x=$365.46 or x=$365.46/.02 or x=$18,273 which is her sales amount.

Radicals/42662: solve -√81 1 solutions Answer 27762 by checkley71(8403)   on 2006-06-18 17:52:54 (Show Source): You can put this solution on YOUR website! -SQRT81=-(+9) OR -(-9) OR -9 & +9

Travel_Word_Problems/42533: The five fastest roller coasters in the world are Fujiyama (Japan), Goliath (CA),Millenium Force (OH), Steel Dragon 2000 (Japan), and Superman the Escape (CA). The speeds , in miles per hour, of the first four coasters are 83, 85, 92, and 95 respectively. How fast can Superman the Escape travel if the average speed of all five coasters in no more that 91 miles per hour? 1 solutions Answer 27761 by checkley71(8403)   on 2006-06-18 17:51:16 (Show Source): You can put this solution on YOUR website! (83+85+92+95+X)/5=91 OR (355+X)/5=91 OR 455=355+X OR X=100MPH. PROOF (355+100)/5=91 OR 455/5=91 OR 91=91

Length-and-distance/42625: In a right triangle, one side of teh right angle is located on the X-axis; teh other side of the right angle is located on teh y-ais. The hypotenuse of this triangle is formed by a segment of one line passing through the point M(2,3). The area of this right triangle is 12 square units. What is the equation of the line passing through the point M? 1 solutions Answer 27760 by checkley71(8403)   on 2006-06-18 17:42:15 (Show Source): You can put this solution on YOUR website! the other two points are (4,0) & (0,6) which creates a triangle with a 4 unit base and a height of 6 thus the area id 4/2*6=12 or 2*6=12. and the equation of the line pasisng through M(2,3) is Y=-3/2X+6

Equations/42627: Find the slope of the line passing through the points (-7,-4) and (-1,-10) 1 solutions Answer 27759 by checkley71(8403)   on 2006-06-18 17:32:29 (Show Source): You can put this solution on YOUR website! (-7,-4)(-1,-10) gives a slope of (-10+4)/(-1+7) or -6/+6 or -1

Equations/42628: Find the y-intercept -x+3y=15 A). (5,0) B) (0,-15) C) (0,5) D) (-15,0) 1 solutions Answer 27758 by checkley71(8403)   on 2006-06-18 17:29:37 (Show Source): You can put this solution on YOUR website! -x+3y=15 or 3y=x+15 or y=x/3+5 or the y intercept is C)(0,5) because in the form Y=mX+b b=y intercept.

Exponents/42633: solve having problems with this one x^2-9 over 4x-12 show work this is what I came up with (x-3)(x+3) over 4(x+3) answer: x-3 over 4 1 solutions Answer 27757 by checkley71(8403)   on 2006-06-18 17:25:25 (Show Source): You can put this solution on YOUR website! (x~2-9)/(4x-12) or (x-3)(x+3)/4(x-3) or cancelling out (x-3) we are left with (x+3)/4 your mistake is 4x-12 is not 4(x+3) but 4(x-3)

Signed-numbers/42634: can u give me the solution to this problem, Thanks. Perform the indicated operations -9 and 1/2 divided by 3 and 1/6 1 solutions Answer 27756 by checkley71(8403)   on 2006-06-18 17:21:07 (Show Source): You can put this solution on YOUR website! (-9 1/2)/(3 1/6) now changing each mixed fraction to an improper fraction we get (-19/2)/(19/6) now changing the divide operation to a multiply(*) and inverting the denominator we get -19/2*6/19 cancelling out the 19 from the numerator & the denominator we get -1/2*6/1 or -3

Polynomials-and-rational-expressions/42535: Solve the equation and check for x x/6 - x/8 = 1 Thanks for help 1 solutions Answer 27674 by checkley71(8403)   on 2006-06-17 19:44:21 (Show Source): You can put this solution on YOUR website! x/6-x/8=1 or (8x-6x)/48=1 or 2x=48 or x=48/2 or x=24

Radicals/42547: How many real roots and or imaginary roots does the following equation have: x^2 - 625 = 0 Thanks 1 solutions Answer 27673 by checkley71(8403)   on 2006-06-17 19:39:47 (Show Source): You can put this solution on YOUR website! x~2-625=0 or (x+25)(x-25)=0 or x=-25 & x=+25

Mixture_Word_Problems/42572: How many liters of water must be added to 5 liters of a 30% acid solution to obtain a 20% acid solution? 1 solutions Answer 27672 by checkley71(8403)   on 2006-06-17 19:29:08 (Show Source): You can put this solution on YOUR website! 5*.3=.2(5+x) or 1.5=1+.2x or .5=.2x or x=5/.2 or x=2.5 liters of water are added to 5 liters which gives us 7.5 liters of solution witl 1.5 liters of acid which calculates to 1.5/7.5=.20 or 20%

Angles/42253: how would i graph y = 3 over 4 x + 2 1 solutions Answer 27468 by checkley71(8403)   on 2006-06-15 21:41:58 (Show Source): You can put this solution on YOUR website! you have a slope of 3/4 (the x multiplier) & points (0,2)the y intercept of y is the right number and setting y=0 we get 0=3/4x+2 or -2=3/4x or 3x=-8 or x=-8/3 so the second point is (-8/3,0)

Polynomials-and-rational-expressions/42318: I have a Final exam tommorow please help. Question: This width of a rectangle is 2cm less than it's length. If the area of the rectangle is 168 cm2 (squared), what is it's width? i think it's base x height so like x (x-2) = 168 ... x2(sqd) - 2x=168 but then what?! 1 solutions Answer 27466 by checkley71(8403)   on 2006-06-15 21:33:54 (Show Source): You can put this solution on YOUR website! x(x-2)=168 or x~2-2x-168=0 or (x-14)(x+12)=0 or x=14cm for the length so the width is 14-2 or width is=12cm.

decimal-numbers/42320: This question is from textbook prealgebra -9y=-0.162 1 solutions Answer 27465 by checkley71(8403)   on 2006-06-15 21:29:04 (Show Source): You can put this solution on YOUR website! -9y=-0.162 or y=-0.162/-9 or y=.018