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Inverses/317501: Find the inverse of the followin matrix, if the inverse exists. A = [2 1 0] [0 2 1] [1 0 -1] 1 solutions Answer 227380 by Fombitz(13828)   on 2010-06-25 13:56:02 (Show Source): You can put this solution on YOUR website! [A]= . . . det[A]= . . . [A]inv=

Exponential-and-logarithmic-functions/317470: find the product (please show work) 3p^2+14p+1/p^2-6p+9 * p^2-3p/25-9p^2 1 solutions Answer 227375 by Fombitz(13828)   on 2010-06-25 13:49:52 (Show Source): You can put this solution on YOUR website!

Equations/317504: Solve. x^2 + 18 - 4 = 0 1 solutions Answer 227373 by Fombitz(13828)   on 2010-06-25 13:45:48 (Show Source): You can put this solution on YOUR website! where . . . If you meant , then Use the quadratic formula,

Polynomials-and-rational-expressions/317511: Let the length and width of a rectangle be 4y and y-3 respectively. If a square inside the rectangle has a side of length y-7, find the remaining area. 1 solutions Answer 227371 by Fombitz(13828)   on 2010-06-25 13:41:31 (Show Source): You can put this solution on YOUR website! The rectangle's area is, The area of the square is, The remaining area is,

Expressions-with-variables/317500: Solve each system by the substitution method x + 3y = 2 -x + y = 1 1 solutions Answer 227370 by Fombitz(13828)   on 2010-06-25 13:37:54 (Show Source): You can put this solution on YOUR website! 1. 2. From eq. 2, Substitute into eq. 1, THen from eq. 2,

Exponential-and-logarithmic-functions/317468: please show work: x+7/x^2+x-56 - x+8/x^2-49 1 solutions Answer 227369 by Fombitz(13828)   on 2010-06-25 13:35:32 (Show Source): You can put this solution on YOUR website! Use a common denominator,

Rational-functions/317515: I am being asked to rationalize the denominator. (sqrt(6) + sqrt(5)) / (sqrt(6) - sqrt(5)) Can you help me with this? Jerry jerry@san.rr.com 1 solutions Answer 227366 by Fombitz(13828)   on 2010-06-25 13:29:47 (Show Source): You can put this solution on YOUR website!

Equations/317510: Find the vertex, the line of symmetry of x is. f(x) = 1/2 (x+8)^2 + 2 1 solutions Answer 227364 by Fombitz(13828)   on 2010-06-25 13:26:50 (Show Source): You can put this solution on YOUR website! The equation is in vertex form, where (h,k) is the vertex. The x coordinate of the vertex also specifies the axis of symmetry. Comparing, (h,k)=(-8,2) The axis of symmetry occurs at .

Triangles/317513: The base of a triangle is one-third as long as its height. If the area of the triangle is 24 square meters how long is its base? 1 solutions Answer 227362 by Fombitz(13828)   on 2010-06-25 13:23:44 (Show Source): You can put this solution on YOUR website! The area of a triangle is, Then,

Mixture_Word_Problems/317183: Tickets for a school play sold for $2.50 for each adult and $1.00 for each child. The total receipts for 113 tickets sold were $221. Find the number of adult tickets sold. 1 solutions Answer 227334 by Fombitz(13828)   on 2010-06-25 11:08:22 (Show Source): You can put this solution on YOUR website! Let A be the number of adult tickets, B the number of child tickets. 1. 2. Multiply eq. 1 by -1 and add to eq. 2, Then from eq. 1,

Human-and-algebraic-language/317402: "A number cubed less the number tripled" "The smoke stacks of the luxury liner cleared the bridge by 25 ft as it passed beneath it. Express the height of the stacks in terms of the bridge's height." "As his reputation and referral business grew, Keith began to charge $75 per service call plus an hourly rate of $50 for the repair and maintenance of home computers. Express the cost of a service call in terms of the number of hours spent on the call." 1 solutions Answer 227333 by Fombitz(13828)   on 2010-06-25 11:05:22 (Show Source): You can put this solution on YOUR website! "A number cubed less the number tripled" . . . "The smoke stacks of the luxury liner cleared the bridge by 25 ft as it passed beneath it. Express the height of the stacks in terms of the bridge's height." where is the stack height and is the bridge height. . . . "As his reputation and referral business grew, Keith began to charge $75 per service call plus an hourly rate of $50 for the repair and maintenance of home computers. Express the cost of a service call in terms of the number of hours spent on the call."

Radicals/317457: 1.( 3x y ^ -1 )/ ( z ^ 2 ) = 2.( 3 x y ^ -2 )/ ( x ^ 3 ) = 1 solutions Answer 227332 by Fombitz(13828)   on 2010-06-25 11:02:58 (Show Source): You can put this solution on YOUR website! 1. . . . 2.

Systems-of-equations/317461: I have a problem in my math lab that I can not figure out here is what I have so far... Solve by substitution method 3x+8y=18 -5x+y=13 solve for y, Y=13+5x 3x+8(13+5x)=18 remove the parenthesis 3x+104+40x=18 What is the coefficient of x? 43 Now solve for x. The answer for x is -2 but I do not know how to get this answer can you please show me what i am doing wrong. The answer I get is this 43x=132 Thank you 1 solutions Answer 227330 by Fombitz(13828)   on 2010-06-25 10:59:45 (Show Source): You can put this solution on YOUR website! You added instead of subtracted. . . <--- Subtract 104 from both sides <--- Divide both sides by 43

Money_Word_Problems/317349: joan had $1000 to invest. she invested part of the money in a COD that paid 4% annual simple interest, and the remainder in a mutual fund that paid 8% annual simple interest. the totsl interest of investments was $68.00. How much did Joan invest in each? 1 solutions Answer 227328 by Fombitz(13828)   on 2010-06-25 10:56:11 (Show Source): You can put this solution on YOUR website! Let A be the amount in the COD, B in the mutual fund. 1. . . 2. Multiply eq. 1 by -4 and add to eq. 2, Then from eq. 1,

Equations/317459: I have been working on this and can't seem to get the answer can you help? A rectangular table is four times as long as it is wide. The area of the table is 100ft^2. I can only get so far with it and keep getting the answer wrong. Can you show me how to do it so I can see where I am messing up. 1 solutions Answer 227326 by Fombitz(13828)   on 2010-06-25 10:52:38 (Show Source): You can put this solution on YOUR website! The area of a rectangle is, 1. "Four times long as wide" 2. Substitute eq.2 in eq. 1, Solve for W, then go back and solve for L using either equation.

Expressions-with-variables/317267: w-8/w-9 - w+1/w+9 + w-27/w^2-81 1 solutions Answer 227325 by Fombitz(13828)   on 2010-06-25 10:50:22 (Show Source): You can put this solution on YOUR website! Use the common denominator, . .

Inequalities/317221: Divide and Simplify. 3x - 18/10 / x-6/35x 1 solutions Answer 227323 by Fombitz(13828)   on 2010-06-25 10:39:57 (Show Source): You can put this solution on YOUR website! Dividing by a fraction is equivlanet to multiplying by its reciprocal.

Exponents/317220: Divide: (36b^2 + 18b^2 + 32b +39) / (6b + 5) 1 solutions Answer 227321 by Fombitz(13828)   on 2010-06-25 10:36:47 (Show Source): You can put this solution on YOUR website! Do you mean or ??

Rational-functions/317212: w=Cr^-2 a. Solve the equation for r. b. Suppose that an object is 100 pounds when it is at sea level. Find the value of C that makes the equation true. (Sea level is 3,963 miles from the center of the Earth.) 100=3963r^-2 I am not sure if I am setting this problem up correctly? Can you let me know and give me some guidance as to what step to take first in solving? 1 solutions Answer 227320 by Fombitz(13828)   on 2010-06-25 10:34:43 (Show Source): You can put this solution on YOUR website! a) . . . b) . . Find C. Plug in the values to find C.

Inequalities/317415: Which of the following CANNOT be a solution to 3x = 6 ≤ - 4x -2? A: -8 B: -3 C: -8/14 D: -8/7 E: -1 1 solutions Answer 227319 by Fombitz(13828)   on 2010-06-25 10:31:37 (Show Source): You can put this solution on YOUR website! Correct your equation. You have both an "=" sign and "<=" sign and you can't have both.

Numeric_Fractions/317450: Packets of washing powder can be bought individually for 2.35 each or in bulk at a rate of 50 packets for 100 dollars. Calculate the saving possible when bulk buying 200 packets. Express this savings as a percentage of the individual cost of the 200 packets. Give your answer correct to 2 decimal places. 1 solutions Answer 227318 by Fombitz(13828)   on 2010-06-25 10:30:27 (Show Source): You can put this solution on YOUR website! Individually: Bulk: Savings: . . . You could save $70 buying packets in bulk. Percentage:=14.89%

Numbers_Word_Problems/317417: The sum of a nozero integer is twice the product of that number and 4. What is the number? A: -2 B: 0 C: 2 D: 4 E: 7 1 solutions Answer 227316 by Fombitz(13828)   on 2010-06-25 10:27:21 (Show Source): You can put this solution on YOUR website! Can you re-phrase your question? What does "sum of a nozero integer" mean? Are you missing a term in that expression?

Human-and-algebraic-language/317419: you are collecting stamps in 16 cents and 21 cents denominations. You have total of $36.21, how many 16 cent stamps and how many 21 cent stamps do you have? 1 solutions Answer 227315 by Fombitz(13828)   on 2010-06-25 10:25:32 (Show Source): You can put this solution on YOUR website! There are multiple answers. 15, 161 36, 145 78, 113 . . . Do you have any additional information?

Exponential-and-logarithmic-functions/317241: Find the product please show work: 6p^2+14p+15/p^2-6p+p * p^2-3p/25-9p^2 1 solutions Answer 227312 by Fombitz(13828)   on 2010-06-25 10:16:23 (Show Source): You can put this solution on YOUR website!

Miscellaneous_Word_Problems/317425: find the indicated output for f(x)=2 smal 2 =3x 1 solutions Answer 227310 by Fombitz(13828)   on 2010-06-25 10:10:22 (Show Source): You can put this solution on YOUR website! Can you clarify what you mean by "f(x)=2 smal 2=3x"?

Trigonometry-basics/317421: A passenger in an airplane at an altitude of 10 kilometers sees two towns directly to the east of the plane. The angle of depression of town a is 55 degrees and the angle of depression of town b is 28 degrees. How far apart are the towns? 1 solutions Answer 227309 by Fombitz(13828)   on 2010-06-25 10:07:01 (Show Source): You can put this solution on YOUR website! Use trigonometry. km . . . km . . . km

Miscellaneous_Word_Problems/317428: 9x-4y=-16 4y-9x=16 1 solutions Answer 227306 by Fombitz(13828)   on 2010-06-25 09:59:23 (Show Source): You can put this solution on YOUR website! 1. 2. . . . There are infinitely many solutions. Line 1 and Line 2 are the same line. Every solution of line 1 is a solution of line 2.

Functions/317416: If f (4) = 3, what is the slope when f (6) = -2? A: -5/2 B: -1/2 C: -2/5 D: 2/5 E: 2 1 solutions Answer 227305 by Fombitz(13828)   on 2010-06-25 09:57:08 (Show Source): You can put this solution on YOUR website! Use the formula for slope, A) is the correct answer.

Travel_Word_Problems/317265: An airplane is flying at a speed of 350 mi/h at an altitude of one mile. The plane passes directly above a radoar station at time t=0 a. Express the distance s (in miles) between the plane and the radar station as a function of the horizontal distance d (in miles) that the plane has flown. b. Express d as a function of the t (in hours) that the plane has flown. c. Use composition to express s as a function of t. 1 solutions Answer 227304 by Fombitz(13828)   on 2010-06-25 09:53:38 (Show Source): You can put this solution on YOUR website! a) The horizontal distance (), the one mile altitude, and form a right triangle. Use the Pythagorean theorem. . . . b) . . . c)

Surface-area/317266: The rectangular prism pictured below has a square left side and an open right side. Its surface area in terms of a and b is 1 solutions Answer 227303 by Fombitz(13828)   on 2010-06-25 09:49:51 (Show Source): You can put this solution on YOUR website! No picture provided. Please repost.

Complex_Numbers/317423: WHAT IS COMPLEX NUMBER 1 solutions Answer 227302 by Fombitz(13828)   on 2010-06-25 09:49:20 (Show Source): You can put this solution on YOUR website! Complex numbers are constructions made up of a two real numbers, ,, and an imaginary part,, in the form,. The important property of is which makes it useful to solve equations of the form,, among others. The solutions for are and . There are many application for complex numbers that provide meaningful interpretations in the real world. Search the internet for examples and properties of complex numbers.