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Recent problems solved by 'richwmiller'

richwmiller answered: 9124 problems
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Proportions/306487: if my times are both in hours such as 1.25 hours and 2 hours can i just do it normally or convert into seconds 1 solutions Answer 219334 by richwmiller(9135)   on 2010-05-19 17:58:12 (Show Source): You can put this solution on YOUR website! Depends on what you mean by normally. 60*60=3600 seconds in an hour so 1.25*3600 and 2*3600 What are you trying to do?

Travel_Word_Problems/306399: Englewood High school is planning a field trip to everglades national park. on the trip, there must be a minimum of one adult for every 8 students. the buses can carry a maximum of 480 people. Define variables and write a system of inequalities to represent this situation. 1 solutions Answer 219333 by richwmiller(9135)   on 2010-05-19 17:54:06 (Show Source): You can put this solution on YOUR website! p= people on trip a=adults on trip s=students on trip 9p<=480 a>=8s p=a+s

Proportions/306427: In a poll about favorite ice cream flavors, chocolate received 8 out of 25 votes from children and 7 out of 28 votes from adults. Which group gave chocolate the higher percent of its vote? I know if I divide 7 by 28 I get 25% and 8 by 25 I get 32% so the answer is the children, however, I do not know how to set the problem up and I must show my work. Thank you. 1 solutions Answer 219329 by richwmiller(9135)   on 2010-05-19 17:34:36 (Show Source): You can put this solution on YOUR website! So far so good. You have set it up fine. Now all you have to do is decide which is bigger 32% or 25% which you said was the children's?

Radicals/306465: Can you please help me solve the following equation. I have a big quiz tomorrow that determines whether or not I go to summer school and I would like to pass it. Please Help Me!! 1 solutions Answer 219325 by richwmiller(9135)   on 2010-05-19 17:28:23 (Show Source): You can put this solution on YOUR website! Use FOIL F 1*4 O 5sqrt(10) I -16sqrt(10) L -4sqrt(10)*5sqrt(10)=-200 add them all up -196-11*sqrt(10)

Systems-of-equations/306448: I need to solve this problem with a system of equations, not guess and check. A two digit number is four times the sum of its digits. If the digits are reversed, the new number is 36 more than the original number. What is the original number? 1 solutions Answer 219324 by richwmiller(9135)   on 2010-05-19 17:23:50 (Show Source): You can put this solution on YOUR website! let the number be 10a+b 10a+b=4*(a+b) 10b+a=10a+b+36 a=4 b=8 original number =48 check 48=4*(4+8) 48=48 ok 84=48+36 84=84 ok

Square-cubic-other-roots/306464: I am having problems with this Please try the following: sqrt(162) + sqrt(288) 1 solutions Answer 219323 by richwmiller(9135)   on 2010-05-19 17:19:48 (Show Source): You can put this solution on YOUR website! 21*sqrt(2) sqrt(162) + sqrt(288) sqrt(81*2)+sqrt(144*2) 9sqrt(2)+12sqrt(2) 21*sqrt(2)

percentage/306462: A store buys a pair of boots for $25. The store then marks them up 60%,then puts them on sale for 25% of the price. how much do they cost now 1 solutions Answer 219322 by richwmiller(9135)   on 2010-05-19 17:17:14 (Show Source): You can put this solution on YOUR website! .75*(1.60*25) .75*40 30

Numbers_Word_Problems/306394: whAt two numbers have a sum of 108 and a product of 2835 1 solutions Answer 219320 by richwmiller(9135)   on 2010-05-19 17:14:55 (Show Source): You can put this solution on YOUR website! a+b=108 a*b=2835 a=108-b (108-b)*b=2835 108b-b^2=2835 b^2-108b+2835=0 prime factors of 2835=3*3*3*3*5*7 3*945 9*315 27*105 63*45 21*135 63*45 (b-63)*(b-45)=0

Graphs/306459: parallel perpendicular or neither -2x+4y=8 2x+4y=2 1 solutions Answer 219313 by richwmiller(9135)   on 2010-05-19 17:03:18 (Show Source): You can put this solution on YOUR website! m=2/4 m=-2/4 neither

Probability-and-statistics/306453: Find the value of the following: 8!12!/5!14! 1 solutions Answer 219312 by richwmiller(9135)   on 2010-05-19 17:01:45 (Show Source): You can put this solution on YOUR website! 24/13 The key is canceling 8!/5!=8*7*6 12!/14!=14*13 (8*7*6)/(14*13) 4*6/13 24/13

Miscellaneous_Word_Problems/306387: Can you please help me with this problem!!! Thank you I often use rebates for items I purchase regularly. For example, recently a beauty company offered a $15 rebate when you purchase at least 3 items costing at least a total of $15 from their product line. The formula for determining the cost after the rebate is C = P – R. (Cost = Price – Rebate) A. Please solve the above equation for the P. B. If my cost is $8 after the rebate, then how much was my total price? 1 solutions Answer 219309 by richwmiller(9135)   on 2010-05-19 16:53:33 (Show Source): You can put this solution on YOUR website! A) C=P-R C+R=P B) C=P-R 8=P-15 23=P or C+R=P 8+15=P 23=P

Linear-systems/306441: x+ 8y = 5 x = 4-8y 1 solutions Answer 219307 by richwmiller(9135)   on 2010-05-19 16:42:26 (Show Source): You can put this solution on YOUR website! plug 4-8y in for x in the first equation and solve for y 4-8y+8y=5 4=5 There is no solution. They are parallel. rearrange the second and we get x+8y=4 x+8y=5

Equations/306443: seven more than the quotient of a number and 2 is 10 1 solutions Answer 219306 by richwmiller(9135)   on 2010-05-19 16:39:21 (Show Source): You can put this solution on YOUR website! 7+n/2=10 n=6 check 7+3=10 ok

Radicals/306423: What is the 7th root of 36 in radical form? 1 solutions Answer 219305 by richwmiller(9135)   on 2010-05-19 16:37:43 (Show Source): You can put this solution on YOUR website! Write root(7,36) wrapped in three { and three } Is this what you are looking for? 1.67

Problems-with-consecutive-odd-even-integers/306431: For two consecutive integers, the sum of the smaller and twice the larger is 29. Find the smaller integer. 1 solutions Answer 219304 by richwmiller(9135)   on 2010-05-19 16:25:23 (Show Source): You can put this solution on YOUR website! You were close to the right topic. n+2*(n+1)=29 Solve for n the smaller integer 3n+2=29 3n=27 n=9 n+1=10 check 9+20=29 ok

Radicals/306109: what is the radical of 50 minus the radical o 1 solutions Answer 219122 by richwmiller(9135)   on 2010-05-18 20:55:21 (Show Source): You can put this solution on YOUR website! If you want our help you will have to submit the problem so that it can be understood. We are math people not magicians. Go back to the submit page and read how to enter radicals and squares and square roots. Also use the math symbols *-+=/ etc. properly. We will be waiting for your problem.

Trigonometry-basics/306101: Hello, I just started a section on trig and wanted to check with a pro to see how i'm doing. Here is my question... In the triangle ABC we have the sides: a=2.5, b=5.0, c=2.0. Thanks for help. 1 solutions Answer 219117 by richwmiller(9135)   on 2010-05-18 20:35:36 (Show Source): You can put this solution on YOUR website! You said that you "wanted to check with a pro to see how i'm doing." But you haven't done anything but ask us to do your homework.

Proportions/306104: y is directly proportional to x and given that y = 42 when x =6. 1 solutions Answer 219116 by richwmiller(9135)   on 2010-05-18 20:32:55 (Show Source): You can put this solution on YOUR website! incomplete problem

Rational-functions/306106: Simplify sqrt |(7) - 1 solutions Answer 219115 by richwmiller(9135)   on 2010-05-18 20:32:11 (Show Source): You can put this solution on YOUR website! If you want our help you have to at least write it correctly Go back to the submit page and read about squared and square root.

Polynomials-and-rational-expressions/306108: x squared over x-2 = 4 over x-2. whats x? teacher told me answer is -2... but I get positive 2... please help me on this 1 solutions Answer 219114 by richwmiller(9135)   on 2010-05-18 20:31:03 (Show Source): You can put this solution on YOUR website! If you want our help you have to at least write it correctly Go back to the submit page and read about squared and square root. You also have to use correctly the math symbols +-=* and /

Equations/306103: 3-spuareroot of 2 multplyed by 5+ 1 solutions Answer 219113 by richwmiller(9135)   on 2010-05-18 20:29:48 (Show Source): You can put this solution on YOUR website! If you want our help you have to at least write it correctly Go back to the submit page and read about squared and square root. You also have to use math symbols * + / and -

Square-cubic-other-roots/306105: 7 sqrt8a to the 5th power times (-3a to the 2nd power x 1 solutions Answer 219112 by richwmiller(9135)   on 2010-05-18 20:28:22 (Show Source): You can put this solution on YOUR website! If you want our help you have to at least write it correctly Go back to the submit page and read about squared and square root.

Equations/306100: solve for "pie", C=2"pie"R 1 solutions Answer 219111 by richwmiller(9135)   on 2010-05-18 20:25:57 (Show Source): You can put this solution on YOUR website! pi not pie. pi*r^2=pi r squared but apple pies are round c=2*pi*r c/(2r)=pi

Polynomials-and-rational-expressions/306072: What is the solution of k+4/2=k+9/3 1 solutions Answer 219110 by richwmiller(9135)   on 2010-05-18 20:18:07 (Show Source): You can put this solution on YOUR website! As it is written there is no solution perhaps you mean 3*(k+4)=2*(k+9) 3k+12=2k+18 k=6

Linear-equations/306083: -x+y=0 1 solutions Answer 219109 by richwmiller(9135)   on 2010-05-18 20:13:33 (Show Source): You can put this solution on YOUR website! My favorite equation. I have ten of them. Do you have a question?

Square-cubic-other-roots/306082: The equation is: Multiply and simplify by factoring. The answer I got is 3y^7*sqrt (3) I just want to know if my answer is right 1 solutions Answer 219108 by richwmiller(9135)   on 2010-05-18 20:11:58 (Show Source): You can put this solution on YOUR website! I get

Equations/306069: I need help factoring the equation 6x^2-5x-21 1 solutions Answer 219106 by richwmiller(9135)   on 2010-05-18 19:59:25 (Show Source): You can put this solution on YOUR website! We want factors of -6*21 which add up to -5 -6*21 -3*2*3*7 -14 9 6x^2-14x+9x-21 2x*(3x-7)+3*(3x-7) (2x+3)*(3x-7)

Linear-equations/306080: graph useing finding intercepts 1 solutions Answer 219104 by richwmiller(9135)   on 2010-05-18 19:53:02 (Show Source): You can put this solution on YOUR website! no similar problems

Linear-equations/306079: graph useing x and y intercept 1 solutions Answer 219102 by richwmiller(9135)   on 2010-05-18 19:51:53 (Show Source): You can put this solution on YOUR website! no similar problems

Linear-equations/306081: graph useing slope and intercepts 1 solutions Answer 219101 by richwmiller(9135)   on 2010-05-18 19:51:03 (Show Source): You can put this solution on YOUR website! no similar problems

Rectangles/306065: What is the approximate length of the diagonal of a square that has a perimeter of 36 inches? 1 solutions Answer 219100 by richwmiller(9135)   on 2010-05-18 19:49:57 (Show Source): You can put this solution on YOUR website! 4x=36 x=9 2s^2=d^2 2*81=d^2 162=d^2 sqrt(161)=d 9*sqrt(2)=d 12.73=d