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richwmiller answered: 9133 problems
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Radicals/255659: 80. Find all real or imaginary solutions to each equation. Use the method of your choice. w2=-225 30. Solve each equation by using the quadratic formula. -3x^2-2x-5=0 1 solutions Answer 187880 by richwmiller(9144)   on 2010-01-11 11:38:11 (Show Source): You can put this solution on YOUR website! w^2=-225 w=-15i w=15i where i=sqrt(-1)

Exponents-negative-and-fractional/255658: How to type a negative sign on the computer to be able to solve a problem? 1 solutions Answer 187879 by richwmiller(9144)   on 2010-01-11 11:35:50 (Show Source): You can put this solution on YOUR website! Next to the zero and ) key you will see - and _ use - for negative sign.

Linear-systems/255664: what is a system equation and how do you solve? 1 solutions Answer 187878 by richwmiller(9144)   on 2010-01-11 11:33:58 (Show Source): You can put this solution on YOUR website! system of equations means more than one equation with the same variables. There are three common ways of solving them. graphing substitution (find the value of one in terms of the other and substitute that for the one.) Sounds worse than it is. elimination (adding , multiplying them )

Points-lines-and-rays/255663: Find the circumference of the circle whose radius is 9 centimeters. 1 solutions Answer 187876 by richwmiller(9144)   on 2010-01-11 11:31:19 (Show Source): You can put this solution on YOUR website! C=2*pi*r pi= abt 3.14 C=2*3.14*9

Square-cubic-other-roots/255662: sqrt56a^10b^6c^22= 1 solutions Answer 187875 by richwmiller(9144)   on 2010-01-11 11:30:13 (Show Source): You can put this solution on YOUR website! How much is in the sqrt? Just 56 or 56a or more? What do you want to do with this expression?

Parallelograms/255640: If you have a parallelogram with two lines bisecting. with m+9.1 on one half of the bisector and 4k-3.5 on the other side. and on the other line there is 2.6k and m. How do you solve this without having to deal with 2 variables? 1 solutions Answer 187873 by richwmiller(9144)   on 2010-01-11 11:27:22 (Show Source): You can put this solution on YOUR website! Let's look at what we know before we panic. Since the line bisects it creates two equal parts. m+9.1=4k-3.5 oh no we have one equation with two variables. Stay calm; we aren't finished yet. 2.6k=m Oh now we have two equations with two variables. So we can solve the two equations and find out where they intersect. Well, look at that m=2.6k We can substitute 2.6k for m in the first equation. 2.6k+9.1=4k-3.5 We now have one equation with one variable. Panic attack avoided. k=9 2.6k=m 2.6*(9)=m 23.4 = m We can check. 23.4+9.1=4(9)-3.5 32.5=32.5 ok

Exponents/255642: How do you solve: (x^10*y^(-8))^-3 that is x to the exponent of 10; y to the exponent of -8; and all of it to the -3 1 solutions Answer 187868 by richwmiller(9144)   on 2010-01-11 11:00:35 (Show Source): You can put this solution on YOUR website! Very interesting problem. Easy solution. The important thing to remember is negative exponent means the reciprocal. = = = We have reciprocals of reciprocals in your problem. = so = = = Let's deal with the reciprocal now =

Percentage-and-ratio-word-problems/250092: The will of an eccentric millionaire reads as follows: "I leave 4/17 of my estate to my son, 7/13 of the remainder to my wife, 2/3 of this remainder to my daughter, and the remaining $2 million to my dog." What was the total amount of the estate? 1 solutions Answer 187816 by richwmiller(9144)   on 2010-01-11 07:57:28 (Show Source): You can put this solution on YOUR website! w=a+b+c+2 000 000 a=4w/17 b=7/13*(17w/17-4w/17)=7/13*13w/17=7w/17 c=2/3(w-4w/17-7w/17)=2/3*(w-11w/17)=2/3*6w/17=4w/17 w=4w/17+7w/17+4w/17+2,000,000 w=15w/17+2 000 000 2w/17=2 000 000 2w=34 000 000 w=$17,000,000

Geometry_Word_Problems/255593: A certain right triangle has its area numerically equal to its perimeter. The length of each side is an even integer. What is the perimeter? (1) 26 (2) 28 (3) 30 (4) 32 (5) None of the above 1 solutions Answer 187813 by richwmiller(9144)   on 2010-01-11 07:25:59 (Show Source): You can put this solution on YOUR website! Area=1/2 bh p=b+h+c p=6+8+10=24 area=1/2*6*8=24 none of the above

Linear-equations/255588: Find the slope, if it exists. -2x+y=8 If I'm using Slope Intercept Form (y=mx+b), m being slope, x being the variable you need to solve for, and b being the y intercept, is -2 the slope (m)? 1 solutions Answer 187809 by richwmiller(9144)   on 2010-01-11 07:15:08 (Show Source): You can put this solution on YOUR website! -2x+y=8 add 2x to both sides y=2x+8 m=2 not -2

Miscellaneous_Word_Problems/255555: According to Bruce Harrell, CPA, the federal income tax for a class C corporation is found by solving a linear equation. The reason for the equation is that the amount x of federal tax is deducted before the state tax is figured, and the amount of state tax is deducted before the federal tax is figured. To find the amount of federal tax for a corporation with a taxable income of $200,000, for which the federal tax rate is 25% and the state tax rate is 10%, Bruce must solve x=0.25[200,000-0.10(200,000-x)] 1 solutions Answer 187788 by richwmiller(9144)   on 2010-01-10 23:31:50 (Show Source): You can put this solution on YOUR website! My guess is that you copied the equation wrong. I suspect the x on the left should be y and the brackets are placed incorrectly

Surface-area/255551: how do you find the total surface area of a cylinder with a smaller cylinder removed from the center 1 solutions Answer 187787 by richwmiller(9144)   on 2010-01-10 23:28:26 (Show Source): You can put this solution on YOUR website! find the surface area of the larger and subtract the surface area of the smaller.

Rational-functions/255547: PLEASE HELP ME, PLEASE!!! Find the horizontal asymptote of the graph of y= (6x^2+5x+9)/(7x^2-x+9) 1 solutions Answer 187786 by richwmiller(9144)   on 2010-01-10 23:25:31 (Show Source): You can put this solution on YOUR website! What have you tried? Do you know what an asymptote is? or the formula for finding it?

Polynomials-and-rational-expressions/255558: 12m-18 over 18n times 9n squared over 8m-12 1 solutions Answer 187785 by richwmiller(9144)   on 2010-01-10 23:24:00 (Show Source): You can put this solution on YOUR website! learn how to enter math terms such as divided by / (and use parentheses )and squared ^

Graphs/255559: how do you solve the equation 2y=5x=12 using a graphing calculator? what buttona do you press on your calculator 1 solutions Answer 187784 by richwmiller(9144)   on 2010-01-10 23:22:35 (Show Source): You can put this solution on YOUR website! For one thing you won't solve it as it is. You copied wrong. I am guessing it should be 2y+5x=12 Depends on the calculator read your manual.

Equations/255561: if y=xz, find a value for y given that x =3 and z=10 1 solutions Answer 187783 by richwmiller(9144)   on 2010-01-10 23:19:45 (Show Source): You can put this solution on YOUR website! y=xz y=3*10 y=30

Numbers_Word_Problems/255560: Choose the number that does not follow the pattern 40, 140, 239, 340 The answer is 239. Why? How do you solve this? 1 solutions Answer 187782 by richwmiller(9144)   on 2010-01-10 23:17:34 (Show Source): You can put this solution on YOUR website! the pattern should be add 100 40, 140, 240, 340. All the others end in 40 the difference between 40 and 140 is 100 the difference between 140 and 340 is 200 A lot of discovering patterns is luck but you also have to be open to patterns

Linear_Equations_And_Systems_Word_Problems/255554: James has 600 goats and chickens altogether on his farm. He counted 900 legs. How many of each animal are there? 1 solutions Answer 187781 by richwmiller(9144)   on 2010-01-10 23:12:34 (Show Source): You can put this solution on YOUR website! 600=g+c c=600-g 4g+2(600-g)=900 There is something wrong because the number of chickens comes up negative 150 Double check your numbers. Even 600 chickens would have 1200 legs. Could it be 1900? 250 chickens 350 goats 500 chicken legs and 1400 goat legs

Human-and-algebraic-language/255557: How many kilograms of water should be mixed with 60 kg of a 30% acid solution to make a 10% acid solution 1 solutions Answer 187779 by richwmiller(9144)   on 2010-01-10 23:00:43 (Show Source): You can put this solution on YOUR website! .3*60=.10(60+x) x=18 kilo of water

Linear-systems/255519: How Do I Solve Linear Equations Like: 2y-5x=10 1 solutions Answer 187757 by richwmiller(9144)   on 2010-01-10 21:37:22 (Show Source): You can put this solution on YOUR website! If by solve you mean find the one and only x and y you can't. There are an infinite number of solutions. so what do you mean?

Expressions-with-variables/249499: using the method substitution method to solve simultaneous equations the question is x=y 5x-4y=-2 1 solutions Answer 187753 by richwmiller(9144)   on 2010-01-10 21:15:34 (Show Source): You can put this solution on YOUR website! substitute x for y 5x-4y=-2 5x-4x=-2 x=-2 y=-2

Miscellaneous_Word_Problems/255422: Two angles are complementary. The sum of the measure of the first angle and one-forth the second angle is 64.5 degree. Find the measures of the angles. What is the measure of the smaller angle? What is the measure of the other angle? 1 solutions Answer 187751 by richwmiller(9144)   on 2010-01-10 21:12:54 (Show Source): You can put this solution on YOUR website! a+b=90 a+b/4=64.5 a=90-b a=64.5-b/4 set the a's equal 90-b=64.5-b/4 35.5=3b/4 142=3b 142/3=b 34=b smaller angle 56=a larger angle check 56+34/4=64.5 34/4=8.5 34=34

Quadratic_Equations/255512: Find a quadratic model for the set of values (-2,8),(0,-4),(4,68) 1 solutions Answer 187749 by richwmiller(9144)   on 2010-01-10 20:59:34 (Show Source): You can put this solution on YOUR website! quadratic equation model f(x)=ax^2+bx+c plug in the values of to find ab and c f(-2)=8 a(-2)^2+b(-2)+c=8 4a-2b-4=8 4a-2b=12 f(0)=-4 a(0)+b*0+c=-4 c=-4 f(4)=68 a(4)^2+b(4)-4=68 16a+4b=72 4a-2b=12 multiply the second by 2 16a+4b=72 8a-4b=24 add them 24a=96 a=4 4(4)-2b=12 16-2b=12 4=2b 2=b a=4 b=2 c=-4 y=4x^2+2x-4 quadratic equation y=2(2x^2+x-2)

Linear_Equations_And_Systems_Word_Problems/255511: you buy 25 boxes of candy and spend $28.00. a box of peppermint cost $1.00 a box and candy canes cost $1.30 a box. how many of each type of candy did you buy? 1 solutions Answer 187747 by richwmiller(9144)   on 2010-01-10 20:43:07 (Show Source): You can put this solution on YOUR website! I only buy spearmint candy canes now. p+c=25 p*1+c*1.3=28 c=10 p=15 15+13=28

Numbers_Word_Problems/255514: how do i find four consecutive numbers whose sum is 208 1 solutions Answer 187746 by richwmiller(9144)   on 2010-01-10 20:39:33 (Show Source): You can put this solution on YOUR website! n+n+1+n+2+n+3=208 4n+6=202 4n=196 n=99 100 101 102

Polynomials-and-rational-expressions/255502: (x^4-8x^2+12)divided (x^2-2) 1 solutions Answer 187745 by richwmiller(9144)   on 2010-01-10 20:37:54 (Show Source): You can put this solution on YOUR website! You can expect that the numerator is going to factor out to (x^2-2) or (x^2+2) (x^4-8x^2+12)/(x^2-2)=(x^2-6)(x^2-2)/(x^2-2)=x^2-6

Polynomials-and-rational-expressions/255505: (x^9+x^8)(x^9+x^8-x^7) 1 solutions Answer 187744 by richwmiller(9144)   on 2010-01-10 20:33:31 (Show Source): You can put this solution on YOUR website! multiply x^9 by the three terms x^9*x^9+x^9*x^8-x^9*x^7 multiply x^8 by the three terms x^8*x^9+x^8*x^8-x^*8*x^7 x^9*x^9+x^9*x^8-x^9*x^7+x^8*x^9+x^8*x^8-x^*8*x^7 now combine like terms x^18+x^17-x^16+x^17+x^16-x^15 x^18+2x^17-x^15 or factored x^15(x^3+2x^2-1)

Exponents/255500: v^9 over v^5 1 solutions Answer 187743 by richwmiller(9144)   on 2010-01-10 20:22:58 (Show Source): You can put this solution on YOUR website! 2^3=8 2^2=4 2^1=2 2^3/2^1=2^2 8/2=4 what did I do with the exponents I subtracted them to divide two like terms to powers subtract he powers v^9/v^5=v^4

Distributive-associative-commutative-properties/255503: I cannot determine what c is in the following: -3(8-c) = 7c Thanks 1 solutions Answer 187741 by richwmiller(9144)   on 2010-01-10 20:19:37 (Show Source): You can put this solution on YOUR website! -3*8=-24 -3*-c=3c -24+3c=7c -24=4c -6=c

Polynomials-and-rational-expressions/255499: how on earth do I divide this following problems? I never even saw it in any of our chapters and even went back to try and find an example. UGH! 14x^7-35x^3+35x over 7x 1 solutions Answer 187739 by richwmiller(9144)   on 2010-01-10 20:18:11 (Show Source): You can put this solution on YOUR website! you want to divide by 7x 14 is 7*2 35 is 7*5 7x*(2x^6-5x^2+5)/7x=2x^6-5x^2+5

Rate-of-work-word-problems/255447: Arthur can do a job in 30 min., Bonnie can do it in 40 min., Claire can do it in 60 min. How long will it take them if they work together? 1 solutions Answer 187735 by richwmiller(9144)   on 2010-01-10 20:14:07 (Show Source): You can put this solution on YOUR website! It has to be less than 30 minutes since Arthur can do it alone in 30 minutes. and Bonnie in 40 minutes so they should be able to do it in abt 17 minutes. 2x+1.5x+1x=1 hour 4.5x=60 x=60/4.5=600/45=13 minutes 20 seconds