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# Recent problems solved by 'rfer'

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 Distributive-associative-commutative-properties/516075: 5(x-7)-(2x-9)1 solutions Answer 344236 by rfer(12647)   on 2011-10-16 20:28:36 (Show Source): You can put this solution on YOUR website!5x-35-2x+9 3x-26
 Linear-equations/516083: Determine if (-5/2,1) is a solution to -2x + 3y = 2 Please show all work1 solutions Answer 344234 by rfer(12647)   on 2011-10-16 20:26:11 (Show Source): You can put this solution on YOUR website!-2*1+3*-5/2= -2+-7.5=-7.5 no solution
 Numeric_Fractions/515941: how do you solve 5/2 divide by -3/41 solutions Answer 344210 by rfer(12647)   on 2011-10-16 17:00:29 (Show Source): You can put this solution on YOUR website!(5/2)/(-3/4) invert and multiply 5/2*-4/3=-20/6=- 3 1/3
 Proportions/515925: Choose the best estimate for the following temperatures. a. A good day to go skiing:-5 C, 15 C, or 35 C? b. Treat yourself for a fever: 29 C, 39 C, or 99 C?1 solutions Answer 344209 by rfer(12647)   on 2011-10-16 16:58:49 (Show Source): You can put this solution on YOUR website!a) -15C b) 39C
 Proportions/515929: Identify the following amounts. a. "Decidollar" b. Centidollar" c. Dekadollar" d. Kilodollar"1 solutions Answer 344207 by rfer(12647)   on 2011-10-16 16:57:09 (Show Source): You can put this solution on YOUR website!a)=\$0.10 b)=\$0.01 c)=\$10.00 d)=\$1000.00
 Money_Word_Problems/515866: jenny invests £3500 at 5% interest per year what will she have at the end of 2 years, 5 years,8 years and 9 years?1 solutions Answer 344205 by rfer(12647)   on 2011-10-16 16:47:11 (Show Source): You can put this solution on YOUR website!simple interest I=Prt I=3500*0.05*2 I=350 3500+350=3850 --------------- compounded annually A=P(1+0.05)^2*1 A=3500*1.05^2 A=3858.75 ------- you do the others. I gave you both because you did not say which one.
 Equations/515872: -1/7a = 51 solutions Answer 344204 by rfer(12647)   on 2011-10-16 16:40:26 (Show Source): You can put this solution on YOUR website!a=5/-1/7 a=5*-7/1 a=-35
 Proportions/515922: What temperature is numerically the same in degrees Celsius and degrees Fahrenheit?1 solutions Answer 344203 by rfer(12647)   on 2011-10-16 16:39:04 (Show Source): You can put this solution on YOUR website!=-40 degrees
 Inequalities/515914: FOUR MORE THEN TWICE A NUMBER IS GREATER THEN TWO-THIRDS OF THE NUMBER 1 solutions Answer 344202 by rfer(12647)   on 2011-10-16 16:37:29 (Show Source): You can put this solution on YOUR website!2x+4 > 2/3x 2x-2/3x > -4 6/3x-2/3x > -4 4/3x > -4 x > -4/(4/3) x > -4*3/4 x > -12/4 x > -3
 Linear-equations/515888: What does y= in the slope intercept form of the linear equation containing the given pair of points (-1,-3) and (-9,-5)1 solutions Answer 344201 by rfer(12647)   on 2011-10-16 16:34:11 (Show Source): You can put this solution on YOUR website!y=mx+b Slope m=(-5--3)/(-9--1) m=-2/-8 m=1/4 ------------- -5=1/4*-9+b -5=-9/4+b b=9/4-5/1 b=9/4-20/4 b=-11/4 b=-2 3/4 ----------- y=1/4x-2 3/4
 Money_Word_Problems/515896: Calculate the simple interest on \$13500.00 for 25 months at 4% interest1 solutions Answer 344200 by rfer(12647)   on 2011-10-16 16:29:24 (Show Source): You can put this solution on YOUR website!I=Prt I=13500*0.04*2.083 I=\$1,124.80
 Linear_Algebra/515376: P=4s for s1 solutions Answer 343947 by rfer(12647)   on 2011-10-15 13:45:02 (Show Source): You can put this solution on YOUR website!s=P/4
 Graphs/515207: it said find an equation of the line having the given slope and containing the given point m=4/5,(4,-6)y=1 solutions Answer 343792 by rfer(12647)   on 2011-10-14 20:08:05 (Show Source): You can put this solution on YOUR website!y=mx+b -6=4/5*4+b -6=20/4+b -6-5=b b=-11 -------------- y=4/5x-11
 Numbers_Word_Problems/515121: 8 times the difference of 8 and a number equals 136 1 solutions Answer 343778 by rfer(12647)   on 2011-10-14 18:35:40 (Show Source): You can put this solution on YOUR website!8(8-x)=136 64-8x=136 -8x=136-64 -8x=72 x=72/-8 x=-9
 Numeric_Fractions/515127: what is the answer to "5+4n=29"?1 solutions Answer 343777 by rfer(12647)   on 2011-10-14 18:32:49 (Show Source): You can put this solution on YOUR website!4n=29-5 4n=24 n=24/4 n=6
 Geometric_formulas/515170: what is the equation for the line that passes through points (-1,-4) and (1,4)?1 solutions Answer 343774 by rfer(12647)   on 2011-10-14 18:30:26 (Show Source): You can put this solution on YOUR website!slope m=(4--4)/(1--1) m=8/2 m=4 -------------- y=mx+b 4=4*1+b 4=4+b b=4-4 b=0 ---------- y=4x with the y intercept at the origin.
 Linear-systems/515134: 9x + 1/9 = x/2 +21 solutions Answer 343773 by rfer(12647)   on 2011-10-14 18:23:35 (Show Source): You can put this solution on YOUR website!(9x+1/9)-2=x/2 (9x-17/9)/2=x 4.5x-(17/9*1/2)=x 4.5x-17/18=x 3.5x=17/18 x=(17/18)(1/3.5) x=17/63
 expressions/515143: 0.3x + 0.3 (x+10) = 3001 solutions Answer 343771 by rfer(12647)   on 2011-10-14 18:18:46 (Show Source): You can put this solution on YOUR website!0.3x+0.3x+3=300 0.6x=297 x=297/0.6 x=495
 Triangles/515153: I have a right triangle labled mno with a base as twice as long as the height. Height is equal to 6 and labled mn. The hypotenus is the square root of 136. Find the measure of side no?1 solutions Answer 343769 by rfer(12647)   on 2011-10-14 18:16:02 (Show Source): You can put this solution on YOUR website!136-(6)^2=100 sq rt 100=10 I don't totally understand the given information, because if the base is twice the heigth it should be 12, but in doing the calculations it comes out to be 10?
 Numbers_Word_Problems/515074: Four less than twice a number is 48. Find the number 1 solutions Answer 343685 by rfer(12647)   on 2011-10-14 13:04:27 (Show Source): You can put this solution on YOUR website!2x-4=48 2x=52 x=26
 Linear-equations/515053: Find the slope, it is defined of each line. If undefined, state this. (-3,2) (3,4) I graphed this, but do not know what ordered pair is in between1 solutions Answer 343683 by rfer(12647)   on 2011-10-14 13:03:17 (Show Source): You can put this solution on YOUR website!slope m=(4-2)/(3--3) m=2/6 m=1/3
 expressions/514784: 18=3y1 solutions Answer 343569 by rfer(12647)   on 2011-10-13 20:43:18 (Show Source): You can put this solution on YOUR website!y=18/3 y=6
 Travel_Word_Problems/514782: If a car is going 65 miles an hour how long does it take to go 25 miles1 solutions Answer 343568 by rfer(12647)   on 2011-10-13 20:42:46 (Show Source): You can put this solution on YOUR website!25/65=0.385 hrs=23 minutes
 Mixture_Word_Problems/514707: If 3/4 is added to three times a number, the result is 1/2 subtracted from twice the number. Find the number.1 solutions Answer 343567 by rfer(12647)   on 2011-10-13 20:41:37 (Show Source): You can put this solution on YOUR website!3x+3/4=2x-1/2 x=-1/2-3/4 x=-2/4-3/4 x=-5/4 x=-1 1/4
 Percentage-and-ratio-word-problems/514763: what is n x 2.25 = 90?1 solutions Answer 343562 by rfer(12647)   on 2011-10-13 20:38:22 (Show Source): You can put this solution on YOUR website!n=90/2.25 n=40
 Numeric_Fractions/514614: factor if possibal 5zto the second power + 2z1 solutions Answer 343488 by rfer(12647)   on 2011-10-13 17:24:17 (Show Source): You can put this solution on YOUR website!z(5z+2)
 Travel_Word_Problems/514564: A woman lives 3060 miles away and her flight will take 5 hours. How fast is the plane going?1 solutions Answer 343487 by rfer(12647)   on 2011-10-13 17:23:11 (Show Source): You can put this solution on YOUR website!3060/5=612 mph
 Numbers_Word_Problems/514570: the sum of three consecutive odd integers is 213, what are the integers1 solutions Answer 343486 by rfer(12647)   on 2011-10-13 17:21:35 (Show Source): You can put this solution on YOUR website!x+x+2+x+4=213 3x=207 x=207/3 x=69 x+2=71 x+4=73
 Sequences-and-series/514575: Six times a number equals the sum of that number and negative 20. What is the number?1 solutions Answer 343483 by rfer(12647)   on 2011-10-13 17:18:58 (Show Source): You can put this solution on YOUR website!6x=x-20 5x=-20 x=-20/5 x=-4
 decimal-numbers/514588: how to divide 84.48 by .88?1 solutions Answer 343482 by rfer(12647)   on 2011-10-13 17:16:45 (Show Source): You can put this solution on YOUR website!84.48/0.88=96 What this question is saying is 84.48 is 88% of what number.
 Rectangles/514590: The perimeter, p, of a rectangular field can be found using the formula p = 2l + 2w where l is the length of the field and w is the width. Which equation could be used to solve for l1 solutions Answer 343481 by rfer(12647)   on 2011-10-13 17:13:43 (Show Source): You can put this solution on YOUR website!L=(p-2w)/2