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# Recent problems solved by 'Fombitz'

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 Linear-equations/345427: Give the slope and -intercept for the graph of the function f(x)23-5x/61 solutions Answer 247027 by Fombitz(13828)   on 2010-09-19 23:06:22 (Show Source): You can put this solution on YOUR website!Compare to the slope-intercept form, where is the slope and is the intercept. Comparing,
 Linear-equations/345409: Find an equation for the linear function g(x) which is perpendicular to the line 7x−4y=8 and intersects the line 7x−4y=8 at x=24.1 solutions Answer 247026 by Fombitz(13828)   on 2010-09-19 23:05:34 (Show Source): You can put this solution on YOUR website!Find the intersection point. (,) . . . Now find the perpendicular line, Perpendicular lines have slopes that are negative reciprocals, Use the point-slope form of a line, USe the point (,) to solve for . . . . . . .
 Angles/345415: this is a multiple choice answer: two angles are supplementary. One angle has a measure that is five less than four times the other. What is the measure of the larger angle? a. 19 b. 71 c. 143 d. 148 e. 153 1 solutions Answer 247024 by Fombitz(13828)   on 2010-09-19 22:58:05 (Show Source): You can put this solution on YOUR website! Substitute, degrees . . . degrees
 Angles/345421: The measure of the angle's supplement is 10 degrees more than three times that of its complement.1 solutions Answer 247022 by Fombitz(13828)   on 2010-09-19 22:56:25 (Show Source): You can put this solution on YOUR website!1. 2. 3. Subtract eq. 1 from eq. 2, Now substitute from eq. 3, degrees . . degrees . . degrees
 Mixture_Word_Problems/345424: In a chemistry class,8 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed? How to solve this problem?1 solutions Answer 247021 by Fombitz(13828)   on 2010-09-19 22:54:01 (Show Source): You can put this solution on YOUR website!Let A be the amount of 10% solution. Write the concentration equation. liters
 Rational-functions/345423: x-4/x-8 + 2x+11/8x = ?1 solutions Answer 247020 by Fombitz(13828)   on 2010-09-19 22:52:26 (Show Source): You can put this solution on YOUR website!Use the common denominator,
 Money_Word_Problems/345408: How long will it take money to double if it is invested at 21% compounded continuously? ""invested at 33% compounded continuously?1 solutions Answer 247017 by Fombitz(13828)   on 2010-09-19 22:42:38 (Show Source): You can put this solution on YOUR website! or approximately, years . . . years
 Mixture_Word_Problems/345410: How much of an alloy that is 20% copper should be mixed with 200 ounces of an alloy that is 50% copper in order to get an alloy that is 30% copper?1 solutions Answer 247015 by Fombitz(13828)   on 2010-09-19 22:40:25 (Show Source): You can put this solution on YOUR website!Let A be the amount of 20% alloy. 40 ounces of 20% copper are needed.
 Polynomials-and-rational-expressions/345406: multiply and simplify 64z^2/4z^2-24z+36 * 4z-12/8z1 solutions Answer 247012 by Fombitz(13828)   on 2010-09-19 22:38:38 (Show Source):
 Rectangles/345321: The perimeter P of a rectangle whose length is 4 ft more than its width x.1 solutions Answer 247011 by Fombitz(13828)   on 2010-09-19 22:33:45 (Show Source):
 Money_Word_Problems/345340: a total of \$8000 is invested. part at 7% and the remainder at 15%. how much is invested at each rate if theannual intrest is 680\$?1 solutions Answer 247009 by Fombitz(13828)   on 2010-09-19 22:31:06 (Show Source): You can put this solution on YOUR website!Let A be the amount invested at 7%, B the amount at 15%. 1. 2. Multiply eq. 1 by (-7) and add to eq. 2, Then from eq. 1,
 Polynomials-and-rational-expressions/345337: x^2-4xy+4y^2=361 solutions Answer 247008 by Fombitz(13828)   on 2010-09-19 22:27:42 (Show Source): You can put this solution on YOUR website! . . .
 Triangles/345405: I have to find the perimeter of a triangle if one side is 10 inches, another side is 1/3 of the perimeter, and the third side is 1/6 of the perimeter. I know the perimeter of a triangle is a+b+c but I'm stuck there. 1 solutions Answer 247006 by Fombitz(13828)   on 2010-09-19 22:24:53 (Show Source): You can put this solution on YOUR website! Substitute, inches
 Inequalities/345341: (-8+4i)-(9-4i)1 solutions Answer 247004 by Fombitz(13828)   on 2010-09-19 22:22:57 (Show Source):
Linear-equations/345402: how do you graph Y<2x+2
1 solutions

Answer 247002 by Fombitz(13828)   on 2010-09-19 22:21:25 (Show Source):
You can put this solution on YOUR website!
Graph the line
Y intercept is (0,2).
Another point on the line using the slope would be:
x:
y:
(1,4)
.
.
.
Plot the points and the line.

.
.
.
Choose a point not on the line; (0,0) is a good choice.
Now test the inequality.
If the point satisfies the inequality, that region is the solution region.
If not, then it's the region that doesn't contain the point that is the solution region.

True, shade the region that contains (0,0).
.
.
.
 Solved by pluggable solver: Plot Any Inequality Graphing function :

 Exponents/345404: Solve 3/x=8/x-1/111 solutions Answer 247000 by Fombitz(13828)   on 2010-09-19 22:17:09 (Show Source): You can put this solution on YOUR website!Multiply both sides by ,
 Expressions-with-variables/345338: 5(n+2)= 3/5(5+10n)1 solutions Answer 246941 by Fombitz(13828)   on 2010-09-19 20:12:27 (Show Source): You can put this solution on YOUR website! Multiply both sides by ,
 Equations/345329: (3)/(10z)+(7)/(4z) how do i find the lowest common denominator1 solutions Answer 246940 by Fombitz(13828)   on 2010-09-19 20:09:11 (Show Source): You can put this solution on YOUR website! Take the highest power of each factor for the LCD
 Travel_Word_Problems/345325: if you go 126 km/h for 30 minutes then go 100 km/h for 45 minutes what is your average speed1 solutions Answer 246939 by Fombitz(13828)   on 2010-09-19 20:07:25 (Show Source): You can put this solution on YOUR website!Rate*Time=Distance . . Convert all times to hours. 30 minutes=1/2 hr 45 minutes=3/4 hr . . . km km km . . . hr . . . kph
 Numeric_Fractions/345180: how to i solve for : 1/3y + 1/4 = 5/12 I dont really understand how to solve for a two step equation while haveing fractions.. can u please show me two ways to do this problem so mabey ill understand better thank you soo much!1 solutions Answer 246938 by Fombitz(13828)   on 2010-09-19 20:03:44 (Show Source): You can put this solution on YOUR website! Multiply by 12 to eliminate fractions. Now take it from there and solve for
 Surface-area/345175: how do u solve this base: 3 ft height:2 in. 1 solutions Answer 246937 by Fombitz(13828)   on 2010-09-19 20:02:32 (Show Source): You can put this solution on YOUR website!What are you solving for?
 Mixture_Word_Problems/345292: a chemist has two solutions of HCL. One has a 40% concentration and the other one has a 25% concentration. How many liters of each solution must be mixed to obtain 136 Liters of a 33% solution?1 solutions Answer 246936 by Fombitz(13828)   on 2010-09-19 20:00:33 (Show Source): You can put this solution on YOUR website!Let A be the amount of 40% solution and B the amount of 25% solution. Volume equation: 1. . . Concentration equation: 2. Multiply eq. 1 by (-40) and add to eq. 2, liters . . . Then using eq. 1, liters
 Inequalities/345312: These problems say to use property 6.1 which is listed as *for any real number a, x^2=a if and only if x= square root a or x=negative square root a. the problem says: 14y^2=801 solutions Answer 246932 by Fombitz(13828)   on 2010-09-19 19:54:11 (Show Source):
 Linear_Algebra/344955: how to factor -8y^2+28y-1601 solutions Answer 246837 by Fombitz(13828)   on 2010-09-19 09:09:27 (Show Source): You can put this solution on YOUR website!This equation cannot be factored easily. Its complex roots are, where
 Linear-systems/344954: Solve the following equations for x and y or state that there is no solution. x + y = 4 2x + 4y = 5 Please help me! I don't even know where to begin. Thanks1 solutions Answer 246836 by Fombitz(13828)   on 2010-09-19 09:06:12 (Show Source): You can put this solution on YOUR website!Use 1 equation to get one variable in terms of the other. Then substitute into the remaining equation. 1. 2. From eq. 1, Substitute into eq. 2, Now that you have solve for
 Angles/344947: 90=1/3(11y-18)+4(y+1)and its asking to solve for y1 solutions Answer 246835 by Fombitz(13828)   on 2010-09-19 09:03:04 (Show Source): You can put this solution on YOUR website! Multiply both sides by . Complete the solution to solve for
 Graphs/344971: How do you solve this problem.Can you please do it by step so i can get the answer.Thanks. Here's my question... Which point lies on the line defined by 3x+6y=2 here's the multiple choice. Is it A) (0,2) B) (0,6 C) (1,-1/6) D) (1,-1/3)1 solutions Answer 246834 by Fombitz(13828)   on 2010-09-19 09:01:25 (Show Source): You can put this solution on YOUR website!Plug in each value and see which value or values make it true. I'll do one, you do the rest. . . . (0,2) 3x+6y=2 False, so (0,2) is not a point on the line. Do the same for the remaining 3 points.
 Travel_Word_Problems/344962: how long does it take to get to Auckland (280km) if you average 75km/h ?1 solutions Answer 246833 by Fombitz(13828)   on 2010-09-19 08:59:00 (Show Source): You can put this solution on YOUR website!Rate*Time=Distance Complete the calculation to get the answer in hours.
 Polynomials-and-rational-expressions/345006: i need to find the constant values of A B and C ? i tried substituting x=-1 and got: -6B + 2C = 18 (but i think thats wrong, and dont know what to do from there) I also worked out that B=2 substititing x=-3 into the equation but i dont know how to work out A and C, maybe use the coefficient of x^2 but i cant work out how to do that?1 solutions Answer 246832 by Fombitz(13828)   on 2010-09-19 08:57:49 (Show Source): You can put this solution on YOUR website!You have to expand all of the products and get one big equation. Then match the coefficients of the terms. So now you have three equations with three unknowns. Solve for A,B,C using substitution, elimination, or matrix methods. Re-post if you need more help.
 logarithm/345014: can you explain how to do this problem please, i am trying so hard to understand how to do these, but i just do not get it :( log2(0.5)^41 solutions Answer 246831 by Fombitz(13828)   on 2010-09-19 08:53:38 (Show Source):
 Square-cubic-other-roots/344965: multiply (5√3-15√2)(4√3+12√2)1 solutions Answer 246830 by Fombitz(13828)   on 2010-09-19 08:50:18 (Show Source): You can put this solution on YOUR website!Use the FOIL method,