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richwmiller answered: 9132 problems
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Quadratic_Equations/296677: 6x^+11x-10 1 solutions Answer 213733 by richwmiller(9143)   on 2010-04-26 11:24:28 (Show Source): You can put this solution on YOUR website! There are many difficulties with your problems. 1- You are not using the exponent symbol correctly. ....2^3 means 2 raised to the third power. .....^ cannot be used without the power bas in 6x^+11x-10 2- They are not equations. Use the right category. 3- you give no instructions. 4- You are limited to one problem at a time 5- No similar nor identical problems 6- No more than 4 problems a day. This website is meant to help you with your homework not to do it all for you.

Quadratic_Equations/296668: On a 135-mile bicycle trip, John averaged 5 miles per hour faster for the first 60 miles than he did for the last 75 miles. The entire trip took eight hours. Find his rate for the first 60 miles. 1 solutions Answer 213730 by richwmiller(9143)   on 2010-04-26 11:16:59 (Show Source): You can put this solution on YOUR website! (x+5)*y=60 x*z=75 y+z=8 x = 15, y = 3, z = 5 20 mph first 60 miles check 20*3=60 5*15=75 3+5=8 ok

Travel_Word_Problems/296667: Horizons has a manufacturing plant located 300 mi from company headquarters. Their corporate pilot must fly from headquarters to the plant and back in 4 hr. If there is a 20-mph headwind going and a 20-mph tailwind returning, how fast must the plane be able to travel in still air? 1 solutions Answer 213727 by richwmiller(9143)   on 2010-04-26 11:10:02 (Show Source): You can put this solution on YOUR website! x+y=4 (p+20)*x=300 (p-20)*y=300 p=152.621, x=1.73791, y=2.26209

Polynomials-and-rational-expressions/296657: solve b^4 + 2b^2 - 24 = 0 a) -2, -sqrt6, sqrt6, 2 b) -sqrt6, 2, 2i, i sqrt6 c) -2, 2, -i sqrt6, i sqrt6 d) -2i, 2i - sqrt6, sqrt6 1 solutions Answer 213724 by richwmiller(9143)   on 2010-04-26 10:54:10 (Show Source): You can put this solution on YOUR website! I'll get you started. Since all complex roots come in plus minus pairs, answer b is out To solve the equation, substitute u for b^2 b^4 + 2b^2 - 24 = 0 u^2+2u-24=0 (u-4)*(u+6)=0 now plug b^2 back in for u (b^2-4)*(b^+6)=0 (b-2)*(b+2)*(b^2+6)=0 solve for b so b = +-2 answer d is out b^2=-6 so answer a is out so it must be answer c

Quadratic_Equations/296652: The quadratic equation x^2 - 8x = -20 is to be solved by completing the square. 1 solutions Answer 213722 by richwmiller(9143)   on 2010-04-26 10:27:14 (Show Source): You can put this solution on YOUR website! I'll help you set it up. take half of the coefficient of x (-8) 8/2=4 square it 16 add to both sides x^2-8x+16=-4

Graphs/296659: how do you graph f(x)=x^2-2x-9? 1 solutions Answer 213720 by richwmiller(9143)   on 2010-04-26 10:24:06 (Show Source): You can put this solution on YOUR website! repeated 18 minutes later no similar problems and no repeats in the same or different category.

Quadratic_Equations/296662: please graph f(x)= 1 solutions Answer 213718 by richwmiller(9143)   on 2010-04-26 10:22:55 (Show Source): You can put this solution on YOUR website! repeated after 18 minutes

Geometry_proofs/296661: Investigate the isosceles Triangle conjecture and the equilateral/equiangular triangle conjecture on a sphere. Write an illustrated report of your findings. 1 solutions Answer 213717 by richwmiller(9143)   on 2010-04-26 10:21:46 (Show Source): You can put this solution on YOUR website! Give me a break. Do you really think we are going to answer this? You need to do some of this. We don't just do your homework although it seems so. If you have a specific question about the problem, submit it.

Miscellaneous_Word_Problems/296654: I got an answer for this but struggling to understnad it it doesnt make complete sense to me, any help would be appreciated. Phil is making a Starbuck’s ® run for his exhausted Math 105 classes. He is going to buy a combination of Lattes and Cappuccinos. The Lattes cost $4 each and the Cappuccinos cost $3 each. If he needs 30 drinks total and has $100 to spend, how many of each should he buy? my answer is 1 + c = 30 41 +3c =100 c=20 L=10 I am just unsure if this is correct doesnt seem to make alot of sense to me. Any help in explaining why this is right would be a help to me. Eric 1 solutions Answer 213715 by richwmiller(9143)   on 2010-04-26 10:03:02 (Show Source): You can put this solution on YOUR website! Yes, those are the same equations I gave a few days ago. Your answer has a slight error in it. The numbers are right. What doesn't make sense? Did you actually do the work or did you get it from somewhere else?

Polynomials-and-rational-expressions/296641: Which describes the number and type of roots of the equation x^2 + 121x = 0 a) 1 real root, two imaginary roots b) 2 real roots. 1 imaginary roots c) 3 real roots d) 3 imaginary roots 1 solutions Answer 213711 by richwmiller(9143)   on 2010-04-26 09:53:39 (Show Source): You can put this solution on YOUR website! This quadratic equation has 2 real roots 0 and -121 Imaginary roots always come in pairs. So b and d are out I have already shown two real roots so a is out The only possible answer among the choices is c but a quadratic (x^2) can have a maximum of 2 roots. So none of the choices are correct. There must be a misprint in the choices or the problem. Solved by pluggable solver: SOLVE quadratic equation with variable Quadratic equation (in our case ) has the following solutons: For these solutions to exist, the discriminant should not be a negative number. First, we need to compute the discriminant : . Discriminant d=14641 is greater than zero. That means that there are two solutions: . Quadratic expression can be factored: Again, the answer is: 0, -121. Here's your graph:

logarithm/296637: Please help me solve this equation: log base 4 of X = log base 4 of (8-X). I know that because both sides have log base 4, that you can drop the logs. But I just can't remember past that. 1 solutions Answer 213710 by richwmiller(9143)   on 2010-04-26 09:43:13 (Show Source): You can put this solution on YOUR website! x=8-x solve for x

Numbers_Word_Problems/296634: Find the larger of two positive real numbers that differ by 4 and have a product of 9. 1 solutions Answer 213709 by richwmiller(9143)   on 2010-04-26 09:39:32 (Show Source): You can put this solution on YOUR website! x-y=4 xy=9 9 has factors 1,9 3,3 9,1 among positive integers none of them differ by 4 x=5.60555, y=1.60555 x = 2+sqrt(13), y = sqrt(13)-2

Linear-equations/296573: When the line 3x=5y-10 and 5x+3y=-21 are graphed on a coordinate plane they are _____. a. Parallel b. Perpendicular c. Same line d. Intersect at (0,2) 1 solutions Answer 213708 by richwmiller(9143)   on 2010-04-26 09:34:08 (Show Source): You can put this solution on YOUR website! Equation one has slope of -3/-5=3/5 Equation two has slope of -5/3 They are perpendicular.

Linear_Equations_And_Systems_Word_Problems/296628: john has a total of 71 cents of change in his pocket 1 solutions Answer 213707 by richwmiller(9143)   on 2010-04-26 09:23:11 (Show Source): You can put this solution on YOUR website! This is a coin word problem. Submitted about 9 times today mostly in percentages.

Circles/296633: whats the diameter of a circle when the length is 6cm wide and 8 cm long ? 1 solutions Answer 213706 by richwmiller(9143)   on 2010-04-26 09:19:52 (Show Source): You can put this solution on YOUR website! What is 6cm wide and what is 8cm long?

Linear_Equations_And_Systems_Word_Problems/296631: steve has $20.51 of change. he has twice as many quarters as pennies and 20 times as many half dollars as quarters.how many of each type does he have? 1 solutions Answer 213705 by richwmiller(9143)   on 2010-04-26 09:18:04 (Show Source): You can put this solution on YOUR website! use correct category word problems coins 2p=q 20q=h p+25q+50h=20.51 h = 40, p = 1, q = 2

Linear_Equations_And_Systems_Word_Problems/296606: Kelly works in a store that pays $5.90 per hour and as a waitress that pays $12 an hour. Last week she worked 9 more hours at the store than she did as a waitress and earned $159.75. How many hours did she work at each job? 1 solutions Answer 213703 by richwmiller(9143)   on 2010-04-26 09:13:14 (Show Source): You can put this solution on YOUR website! 5.9*(x+9)+12*x=159.75 x=5.9581 hrs x+9=14.9581 hrs full hours 5.9*15+12*6=160.5

Coordinate-system/296598: graph the following functions: 1)f(x)=x^3+x^2 1 solutions Answer 213702 by richwmiller(9143)   on 2010-04-26 09:05:00 (Show Source): You can put this solution on YOUR website! One problem at a time. No similar problems. Use the right category.

Graphs/296570: determine whether the graphs of the pair of lines are parallel. 1 solutions Answer 213701 by richwmiller(9143)   on 2010-04-26 09:00:09 (Show Source): You can put this solution on YOUR website! repeated

percentage/296618: steve has $20.51 of change. he has twice as many quarters as pennies and 20 times as many half dollars as quarters.how many of each type does he have? 1 solutions Answer 213699 by richwmiller(9143)   on 2010-04-26 08:54:14 (Show Source): You can put this solution on YOUR website! Use the correct category. No similar problems

percentage/296622: john has a total of 71 cents of change in his pocket. he has 1 more nickel than ha has pennies and 6 times as many dimes as pennies. how many of each type of coin does he have? 1 solutions Answer 213698 by richwmiller(9143)   on 2010-04-26 08:53:14 (Show Source): You can put this solution on YOUR website! Use the correct category. Same problem submitted at least 4 times.

percentage/296623: john has a total of 71 cents of change in his pocket. he has 1 more nickel than ha has pennies and 6 times as many dimes as pennies. how many of each type of coin does he have? 1 solutions Answer 213697 by richwmiller(9143)   on 2010-04-26 08:51:54 (Show Source): You can put this solution on YOUR website! Use the correct category. Same problem submitted at least three times

percentage/296624: john has a total of 71 cents of change in his pocket. he has 1 more nickel than ha has pennies and 6 times as many dimes as pennies. how many of each type of coin does he have? 1 solutions Answer 213696 by richwmiller(9143)   on 2010-04-26 08:50:23 (Show Source): You can put this solution on YOUR website! Use the correct category. No similar problems.

percentage/296620: find three consecutive even integers so that the largest is 2 times more than the smallest? 1 solutions Answer 213695 by richwmiller(9143)   on 2010-04-26 08:49:28 (Show Source): You can put this solution on YOUR website! Use the correct category.

percentage/296621: john has a total of 71 cents of change in his pocket. he has 1 more nickel than ha has pennies and 6 times as many dimes as pennies. how many of each type of coin does he have? 1 solutions Answer 213694 by richwmiller(9143)   on 2010-04-26 08:48:49 (Show Source): You can put this solution on YOUR website! Use the correct category. Same problem submitted at least 4 times.

Linear-equations/296616: By looking at two linear equations, how can you tell that the corresponding lines are parallel? 1 solutions Answer 213693 by richwmiller(9143)   on 2010-04-26 08:47:26 (Show Source): You can put this solution on YOUR website! If the linear equations are in slope intercept form you can compare the m(slopes). If the linear equations are in standard form you can see -a/b are the slopes and compare. If the slopes are equal the lines are parallel.

Linear-equations/296619: the sum of two consecutive multiples of 17 is 85. find the number [i know the answer is 34 and 51, but how come? 1 solutions Answer 213692 by richwmiller(9143)   on 2010-04-26 08:44:12 (Show Source): You can put this solution on YOUR website! 17x+17(x+1)=85 17*(2x+1)=85 2x+1=5 2x=4 x=2 17*2+17*3=85 34+51=85

Linear_Algebra/296611: Hi there are 2 rental car companies, 1) offering a car for $100pw including 100km for free & then 11c per km 2) offering a car for $75pw including 150km for free & then 15c per km at what point will the 2 be the same cost? thank you so much for your help Sam 1 solutions Answer 213691 by richwmiller(9143)   on 2010-04-26 08:40:00 (Show Source): You can put this solution on YOUR website! 1) offering a car for $100pw including 100km for free & then 11c per km 2) offering a car for $75pw including 150km for free & then 15c per km c=100+.11*(k-100) c=75+.15*(k-150) set them equal and solve for k k=912.5 km It will cost 189.375 for each

Systems-of-equations/296540: 6x>30 1 solutions Answer 213665 by richwmiller(9143)   on 2010-04-25 23:01:03 (Show Source): You can put this solution on YOUR website! How would you get 6x to become x add? multiply? divide? or subtract?

Number-Line/296544: I am 3 tenths less than 5 times7. Who am I? 1 solutions Answer 213664 by richwmiller(9143)   on 2010-04-25 22:57:07 (Show Source): You can put this solution on YOUR website! A very strange talking numerical person who knows English but not who it is. How sad! (5*7)-.3=35-.3=34.7

Polynomials-and-rational-expressions/296547: A company produced 2,265,400 tires in one year and made a profit of $15,720,000. What was the profit on each tire? 1 solutions Answer 213663 by richwmiller(9143)   on 2010-04-25 22:54:27 (Show Source): You can put this solution on YOUR website! You have two numbers. What will you do with them? Let's say it was 2 tires for a profit of $15. What was the profit on one tire? add? subtract? multiply? divide?