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 Linear-equations/459441: Please help me solve this equation : what is the distance between (-2,5) , (3,1) ?1 solutions Answer 315058 by rfer(12644)   on 2011-06-09 17:22:17 (Show Source): You can put this solution on YOUR website!5^2+4^2=c^2 25+16=41 sqrt 41=6.4
 Polynomials-and-rational-expressions/459442: Please help me with this problem : what is the slope intercept of points (-1,4) and (5,2) ?1 solutions Answer 315056 by rfer(12644)   on 2011-06-09 17:18:59 (Show Source): You can put this solution on YOUR website!m=(2-4)/(5--1) m=-2/6 m=-1/3 ---------------- y=mx+b 2=-1/3*5+b 2=-5/3+b b=2+5/3 b=12/6+10/6 b=18/6 b=3 ------------- y=-1/3x+3
 Coordinate-system/459310: Write an equation for the line with slope 3 going through the point (1,-2). How would I do this? I'm 46 and trying to refresh my algebra skills. Thanks 1 solutions Answer 314984 by rfer(12644)   on 2011-06-09 13:47:38 (Show Source): You can put this solution on YOUR website!first find the y intercept y=mx+b -2=3*1+b -2=3+b b=-5 ---------------- put information in equation. y=3x-5
 Trigonometry-basics/459190: You are standing 75 meters from the base of the Jin Mao in Shangai, China. You estimate that the angle of elevation to the top of the building is 80. What is the approximate height of the building? Suppose one of your friends is at the top of the building. What is the distance between you and your friend? i found the answer to the first question its 425.3.. i have no idea how to do the second part of the problem... 1 solutions Answer 314922 by rfer(12644)   on 2011-06-08 23:50:47 (Show Source): You can put this solution on YOUR website!75^2+425.3^2=c^2 5625+180880=1886505 sqrt 1886505=1373.5 meters
 Money_Word_Problems/459123: (1) How much money will you have in an account after 10 years if you deposit \$5000 into the account and it pays 5% annual interest (a) compounded quarterly? (b) if it is simple interest (This can be done even without a fancy calculator.) 1 solutions Answer 314920 by rfer(12644)   on 2011-06-08 23:41:47 (Show Source): You can put this solution on YOUR website!A=5000(1+0.05/4)^4*10 A=5000*1.6436 A=\$8,218 -------------- I=5000*0.05*10 I=2500 5000+2500=\$7,500
 Equations/459184: x+4/7>31 solutions Answer 314918 by rfer(12644)   on 2011-06-08 23:31:45 (Show Source): You can put this solution on YOUR website!x > 3-4/7 x > 63/21-12/21 x > 51/21 x > 2 3/7
 Travel_Word_Problems/459151: sue and may ride bikes in opposite directions. may rides 5 mph faster then sue. if they are 25 miles apart after one hour, find sues rate of speed1 solutions Answer 314917 by rfer(12644)   on 2011-06-08 23:29:01 (Show Source): You can put this solution on YOUR website!x+x+5=25 2x=20 x=10mph x+5=15mph
 Numeric_Fractions/459178: the average of two numbers, aand b, is given by. A=a+b/2 if the average of two numbers is 73 and if one og f the numbers is 59, then what is the other number?1 solutions Answer 314916 by rfer(12644)   on 2011-06-08 23:26:54 (Show Source): You can put this solution on YOUR website!73=(59+b)/2 146=59+b b=87
 Surface-area/459095: 11 5/6 / 71 solutions Answer 314860 by rfer(12644)   on 2011-06-08 19:39:58 (Show Source): You can put this solution on YOUR website!71/6*1/7=71/42 =1 29/42
 Human-and-algebraic-language/459049: An apartment building contains 12 units consisting of one- and two-bedroom apartments that rent for \$360 and \$450 per month, respectively. When all units are rented, the total monthly rental is \$4,950. What is the number of two-bedroom apartments? A. 3 B. 4 C. 5 D. 6 E. 71 solutions Answer 314859 by rfer(12644)   on 2011-06-08 19:38:07 (Show Source): You can put this solution on YOUR website!x+y=12 y=12-x 360x+450y=4950 360x+450(12-x)=4950 360x+5400-450x=4950 -90x=-450 x=5 y=12-5=7 two bed
 Probability-and-statistics/459067: i need help solving this. Thomas has a set of 26 alphabet cards, each having a different letter of the alphabet on it. He randomly draws one card and then rolls a fair die, numbered from 1 to 6. What is the probability he draws a card with a vowel (a, e, i, o, u) on it and then rolls a number divisible by 2? 1 solutions Answer 314844 by rfer(12644)   on 2011-06-08 18:39:51 (Show Source): You can put this solution on YOUR website!5/26*3/6=15/156=5/52
 Proportions/459001: find the unit rate of \$11.58 for 8.2 galons1 solutions Answer 314830 by rfer(12644)   on 2011-06-08 15:57:28 (Show Source): You can put this solution on YOUR website!11.58/8.2=\$1.412 per gal
 Average/458945: evaluate this polynomail if a=2 b=-3 c=4 d=-5 ab+cd 1 solutions Answer 314823 by rfer(12644)   on 2011-06-08 15:03:56 (Show Source): You can put this solution on YOUR website!2*-3+4*-5 -6+-20=-26
 Distributive-associative-commutative-properties/458957: A jet liner hits an air pocket & drops 216 feet. After climbing 173 feet, it drops another 119 feet. What is its overall vertical change?1 solutions Answer 314821 by rfer(12644)   on 2011-06-08 15:02:02 (Show Source): You can put this solution on YOUR website!-216+173-119=-162 ft
 Polynomials-and-rational-expressions/458967: Simplify a - {5b - [a - (3b - 2c) + c - (a - 2b - c)]}. Possible answers below show me how u got the answer! -a - 6b + 4c a - 6b + 4c a - 10b + 4c -a + 10b + 4c1 solutions Answer 314820 by rfer(12644)   on 2011-06-08 14:58:36 (Show Source): You can put this solution on YOUR website!a-{5b-[a-3b+2c+c-a+2b+c]} a-{5b-a+3b-2c-c+a-2b-c} a-{6b-4c} a-6b+4c
 test/458753: In a class of 44 students, the number of females is one fewer than twice the number of males. How many females and how many males are there in the class?1 solutions Answer 314688 by rfer(12644)   on 2011-06-07 23:10:22 (Show Source): You can put this solution on YOUR website!x+2x-1=44 3x=45 x=15 boys 29 girls
 Percentage-and-ratio-word-problems/458691: If a shirt you buy at the store is \$90.00 and there is a 5% sale there was also a 17% tax. What is the final price? 1 solutions Answer 314671 by rfer(12644)   on 2011-06-07 21:29:41 (Show Source): You can put this solution on YOUR website!90*0.95*1.17=\$100.04
 Triangles/458721: If a right triangle has a hypotenuse of 12cm and one leg of 9cm, what is the length of the other leg?1 solutions Answer 314666 by rfer(12644)   on 2011-06-07 21:25:24 (Show Source): You can put this solution on YOUR website!144-81=63 sq rt 63=7.9
 Triangles/458720: 1 solutions Answer 314665 by rfer(12644)   on 2011-06-07 21:23:22 (Show Source): You can put this solution on YOUR website!12, 16, 20 triangle
 Angles/458669: if angle abc = 78 what is the measurement of the angle supplementary to angle abc?1 solutions Answer 314618 by rfer(12644)   on 2011-06-07 20:02:55 (Show Source): You can put this solution on YOUR website!180-78=102
 Graphs/458666: What is the point-slope form of an equation of the line that passes through (4,-3) and (2,1)?1 solutions Answer 314617 by rfer(12644)   on 2011-06-07 20:01:47 (Show Source): You can put this solution on YOUR website!slope m=(1--3)/(2-4) m=4/-2 m=-2 -------------- y=mx+b 1=-2*2+b 1=-4+b b=5 ---------- y=-2x+5
 Graphs/458664: What equation contains the points (-1,-8) and (-9,-21)1 solutions Answer 314616 by rfer(12644)   on 2011-06-07 19:58:47 (Show Source): You can put this solution on YOUR website!slope m=(-21--8)/(-9--1) m=-13/-8 m=13/8 --------------- y=mx+b -9=13/8*-1+b -9=-13/8+b -9+13/8=b -72/8+13/8=B -59/8=b b=-7.4 ------------ y=13/8x-7.4
 test/458633: Got it. Five times the sum of a number and -1 is the same as 6 times the number. Find the number1 solutions Answer 314612 by rfer(12644)   on 2011-06-07 19:52:53 (Show Source): You can put this solution on YOUR website!5(x-1)=6x 5x-5=6x x=-5
 Money_Word_Problems/458639: a principal of 5000 is invested at 3.5% intrest rate annually after 5 years how much would the investment be worth? 1 solutions Answer 314609 by rfer(12644)   on 2011-06-07 19:50:08 (Show Source): You can put this solution on YOUR website!A=5000(1.035)^5 A=5000*1.1877 A=\$5,938.50
 Miscellaneous_Word_Problems/458641: Hello, Can someone help me solve this problem? Translate to an algebraic twice n The translation is___?1 solutions Answer 314608 by rfer(12644)   on 2011-06-07 19:47:29 (Show Source): You can put this solution on YOUR website!=2n
 Travel_Word_Problems/458648: A car travels at 45 miles per hour for 90 minutes. How far has it traveled in this time?1 solutions Answer 314607 by rfer(12644)   on 2011-06-07 19:46:15 (Show Source): You can put this solution on YOUR website!45*1.5=67.5 miles
 Polynomials-and-rational-expressions/458652: Short answer. Find the product: -4x (8x^3 + 9x^2 – 5x + 3) 1 solutions Answer 314606 by rfer(12644)   on 2011-06-07 19:44:22 (Show Source): You can put this solution on YOUR website!=-32x^4-36x^3+20x^2-12x
 Graphs/458659: How can you solve a word problem that only explains the equation and does not show it in number form?1 solutions Answer 314605 by rfer(12644)   on 2011-06-07 19:42:51 (Show Source): You can put this solution on YOUR website!post it so we can see it.
 Triangles/458655: The angles of a triangle are in the ratio of 2:3:7. How do I find the measures of the angles?1 solutions Answer 314603 by rfer(12644)   on 2011-06-07 19:42:02 (Show Source): You can put this solution on YOUR website!2x+3x+7x=180 12x=180 x=15 2x=30 3x=45 7x=105
 Proportions/458656: how to solve using a proportion to find 5% of 320.1 solutions Answer 314601 by rfer(12644)   on 2011-06-07 19:40:28 (Show Source): You can put this solution on YOUR website!320*0.05=16
 Triangles/458600: How do I find if a triangle is a right triangle through the side lengths 6,8,10?1 solutions Answer 314600 by rfer(12644)   on 2011-06-07 19:38:42 (Show Source): You can put this solution on YOUR website!36+64+100 sqrt 100=10, yes it is a right triangle This is a classic 3, 4, 5 triangle.