# math..solve for u again

159,206 results, page 61

1. ### math

Solve the system of equations algebraically. Show all your steps. y=x^2+2x y=3x+20 Can someone pease help me? I don't think I'm right. Would it be x=-4, y=8 Then, x=5,y=35??
2. ### Math

The sum of 4 consecutive odd numbers is 296. Write an equation and solve it to find the second highest number.
3. ### Math

(secx-cosx) / (tanx-sinx) = cosecx+cotx Spent hours to solve this question but failed. Please help. Thank you
4. ### Math

How many five-card hands chosen from a standard deck contain two hearts and three spades? How do I solve this?
5. ### Math

Hello, I need help solving two systems of equations. I'm not sure how to solve them. They are: 7w+e=8 e+5=9 And the second one is: 7e=107-6d 7e+8d=117 Thanks!
6. ### Math

Solve. Movie tickets cost $9.50. How much change will a customer who pays for one ticket with a$20.00 bill received?
7. ### Math

Solve. Movie tickets cost $9.50. How much change will a customer who pays for one ticket with a$20.00 bill received?
8. ### Math

Solve. Movie tickets cost $9.50. How much change will a customer who pays for one ticket with a$20.00 bill received?
9. ### Math

Solve. Movie tickets cost $9.50. How much change will a customer who pays for one ticket with a$20.00 bill received?
10. ### Math

Use the quotient rule to find the derivative of cot x. I tried to solve this, but somehow I got (sec^2x)/(tanx)^2.
11. ### 7TH GRADE MATH HELP!!!!!

Hey I had to divide 7 by 20 and the answer is .35 but I need to solve it without a calculator and I dont know what I'm doing please help thanks you
12. ### Math

Solve the following system using elimination (aka linear combination) attach an extra sheet, if needed. { 3x+2y+4z=11 { 2x-y+3z=4 { 5x-3y+5z=-1
13. ### Math

Use a graphing calculator to solve the equation -3cost=1 in the interval from.0<theta<2pi Round to the nearest hundredth.
14. ### math

Solve for n: ((3^n)^n*(3^n)^-1) / 81 = 1 Answer (n) = -1, 4 I have no idea how n = -1, 4. Also, please don't ask if the answers are actually wrong or not, they are directly from the text book.
15. ### math

You have $5 for lunch. You bought a turkey sandwich for$2.25. Write an solve an inequality to show how much you can spend. PLZ HELP
16. ### math

How do you solve this expression \sqrt[8]{v^{40}}!!! So basically it's v^40 divided by 8!!! When I typed v^5 on my homework it said that it was incorrect!!! I want to know what I did wrong!!! Pleaseeeeeeee helpppppppp!!! :(
17. ### math

Solve the system of equations below by graphing. mc009-1.jpg What are the approximate solutions rounded to the nearest tenth?
18. ### MATH

24/(x+1) + 12/(4-x) = 14 Multiply both sides by (4-x)(x+1) 24(4-x) + 12(x+1) = 14(4-x)(x+1) 96 - 12x + 12 = -14(x^2 -3x -4) = -14x^2 +42 x +56 Combine terms and solve for x. sorry guys, here's another.I'm not the greatest at math but i do know some... The rectangle given has a...
19. ### math

Sorry I'm posting again-- I just thought it would increase my chances of getting my question answered if i posted it in the mathematics portion of the website also. --------------------------------------- One can of pumpkin pie mix will make a pie of diameter 8 in. If two cans...
20. ### Math

How would you work this problem? The odometer of the family car read 15951 when the driver noticed that the number was palindromic. "Curious," said the driver. "It will be a long time before that happens again." But two hours later, the odometer showed a new palindromic number...
21. ### Math

The area of a rectangle is 220 square centimeters. The height of the rectangle is two more than twice the base. What is the rectangle's perimeter? I know you can solve this employing a guess-and-check strategy, but I want to know if this can be solved algebraically. So far, I'...
22. ### Geometry

Ok it's me again. I'm am working on problems that involve describing number patterns. I've figured them all out but two. Here are the two strings or numbers 7,9,13,19,27,;;;; and 256, 16, 4, 2 Any help?
23. ### Algebra

Thanks to those who helped with my question: y+3=-1/12(x-1)^2. The only thing I am still unsure of is how to write the equation for the directrix. Do I just simply write 0=3-3, (the values plugged in for y=k-p). Thanks again for your help!!
24. ### social studies

I need a few things for World Cultures that have to do with legacy of Rome Two examples each. Alphabet, Government, and Architecture. And again that's 2 examples each
25. ### Calculus2

Please, help me I really need help on this problem. Thank you so much for all your help. Question: Find the radius of convergence and interval of convergence for sum(n=1to infinity)(-1)^n-1 n(x-1)^n/(n^2+1)2^n Thank you again
26. ### Chemistry

Confused again ok I have to find the number of atoms in carbon with a mass of 13.5. So this is what I didi. 13.5 / 12.01* 6.022 *10^23= 6.77x10^23 but the correct answer is 6.74x10^23 what have I done wrong
27. ### people

What i learned about bedbugs made me want to never sleep again. Adverbial Clause Misplaced modifier noun clause compound sentence i think it is C
28. ### Physics

A 24.0-V battery is connected to a 4.70-µF capacitor. How much energy (in J) is stored in the capacitor? I'm guessing this is really easy but my professor sent us into the homework blind...again...
29. ### school

A ball thrown vertically upward reaches a certain height and comes down again. What can you say about its kinetic energy at the maximum height?
30. ### math ,correction

Directions: Solve each of the following problems. Be sure to show the equation used for the solution. The length of a rectangle is 2in. more than twice its width. If the perimeter of the rectangle is 34 in., find the dimensions of the rectangle. Let L = length and W = width. L...
31. ### tech III math ( ACT Prep)

A neon sign flashes every 4 seconds, another neon sign flashes every 6 seconds. If they flash together,how manyseconds later will they flash together again?
32. ### math..word problem

A number of bacteria are placed in a glass. One second later each bacterium divides in two, the next second each of the resulting bacteria divides in two again, etc. After exactly one minute, the glass is full. When was the glass half full?
33. ### math

Two runners start moving from the same point A on a circular track but in oppostite directions. Their speeds are 5 ft. per second and 9 ft. per second. If they start at the same time and finish when they first meet at point A again, how many times do they meet, excluding the ...
34. ### MATHS ASAP!!!!!

At the x axis, y is zero. So if the x intercept is (1,0) then (y-a)^2=x + b (0-a)^2=1 + b Now the vertex. (y-a)^2=x +b (2-a)^2= 0 + b or these two equations are.. a^2= 1+b or b= a^2 - 1 putting this into the second equation. 4-4a + a^2=a^2-1 solve for a, then go back and solve...
35. ### Chemistry

NaOH(aq) + HCl(aq)----> H20 + Nacl(aq).. solve for the amoont of energy aborbed by the solution. (50ml of 1.0M HCl is 23deg; 50ml of 1.0M NaOH is at 25deg; mixed solutuion= 31deg pls tell me the steps to take inorder to solve the question. Thanks in advance.
36. ### Math

Find X 27^4x-2=243^3x+6 Please explain how to do it. Thanks 27^(4x-2)=243^(3x+6) Notice that 27 and 243 are both multiples of 3 Changing them.. (3^4)^(4x-2)=(3^6)^(3x+6) 3^4(4x-2)= 3^6(3x+6) taking the log base 3 of each side. (4x-2)= (3x+6) and solve for x. That doesn't work ...
37. ### chemistry

I keep getting wrong answers for this question. Determine the pH of an HF solution of each of the following concentrations. a) .280 M b) 5.3*10^-2 M c) 2.50*10^-2 M No Ka has been given. I haven't attempted b or c yet because I want to at least solve a first. So far I got a ...
38. ### algebra

The sample size needed to estimate the difference between two population proportions to within a margin of error E with a confidence level of 1- alpha can be found by using the equation shown below. Replace n1 and n2 by n and solve for n. E= z alpha/2 square root p1q1/n1 + ...
39. ### algebra 1

I'm stuck on this problem. Can you help? -4x-9y=1 -x + 2y =-4 WHat is x and y? Two equations in two unknowns. Here is a quick way to solve them -4x - 9y = 1 4x - 8y = 16 (I got that my multiplying both side so the secind equation that you provided by -4) Now add the two ...
40. ### Chemistry

IN my experiment, I was doing a qualitative analysis of Group I and II anions using a flowchart. IN the chart I added 5 drops of 0.1M AgNO3 and several drops of 3M HNO3 to 5 drops of solution and found that a precipitate was formed. Thus it was classified as a Group I anion. ...
41. ### math

what are division rules as it applies to the following 0/71= 23/23= 29/1= This is my daughter's 4th grade math and they are asking us to explain the didvision rules that are used to solve these problems. However they have not provided us with the division rules or their terms ...
42. ### Math - Trig Substitution

How can I solve the integral of x^3√(9-x^2) dx using trigonometric substitution? ? ∫ x^3√(9-x^2) dx So then I know that x = 3sinθ dx = 3cosθdθ When I substitute, it becomes ∫ (3sinθ)^3 * √(9-(3sinθ)^2) * 3cosθdθ...
43. ### math

Money is invested at two rates of interest. One rate is 8% and the other is 2%. If there is $1000 more invested at 8% than at 2%. Find the amount invested at each rate if the annual interest from both investments is$310. Let x amount invested at 8% and y = amount invested at ...
44. ### One more 5th grade adding letter problem

I thought I was getting the hang of these but I'm stumped on this one too. Any advise on how to solve it? s e e d + i c e d ---------- s p i c e c= ___ d=___ e=___ i= ___ p= ___ s=___ Hint: Solve for s and i. Then is e is even or odd? Thanks.
45. ### Algebra

I'm not sure if I have this correct I have to solve each literal equation for the indicated variable. A=1/2h(B+b)variable is (b). I have the answer as: 2A=h(B1+b2) 2A/h=B1+b2 (2A/h)-b2=B1 Is this correct? weren't you supposed to solve for "b"? that would be b = (2A - Bh)/h or ...
46. ### Algebra/Precalculus

Solve the system of linear equations and check any solutions algebraically. (If there is no solution, enter NO SOLUTION. If the system is dependent, express x, y, and z in terms of the parameter a.) 3x-3y+6z=6 x+2y-z=8 5x-8y+13z=4 I don't know what parameter A is... Do I solve...
47. ### algebra 2

again.. im lost with finding slope intercept and standard form of this equation as well. x intercept =2, y intercept= -4
48. ### Math

Marks worth is A 1 B 2 C 2 Please explain next to it though how you got that answer and what to write to get that mark. Clearly explain as I have no clue, don't leave anything out though! Information needed to solve There is an isosceles triangle with corners A, B and C. ...
49. ### problem solving

One small and one large animal puzzle kit cost \$16 altogether. If the large kit costs three times as much as the small kit, how much does each kit cost? 4 and 12 A= large animalpuzzle kit. a= small animal puzzle kit. A + a = 16 A = 3a ================= solve for A and a. Hint...
50. ### algebra

Solve for x x/6-x/8 equals 1 Do fraction busters Find the least common denominator, which is 24. Change the fractions to where they have the same denominator. Change 1 to equal 24/24, and solve. Did this help? x/6 + x/8 = 1 multiply each term by 24, the lowest common ...
51. ### Chemistry

A rock is 5.0% by mass fayolite(Fe2SiO4), 7.0% by mass forsterite(Mg2SiO4) and the remainder silicon dioxide. What is the mass percent of each element in the rock? I have the answers but i don't know how to solve the problem. How would you in steps solve the problem?
52. ### CHEMISTRY:))))

A rock is 5.0% by mass fayolite(Fe2SiO4), 7.0% by mass forsterite(Mg2SiO4) and the remainder silicon dioxide. What is the mass percent of each element in the rock? I have the answers but i don't know how to solve the problem. How would you in steps solve the problem?
53. ### Calculus

More questions on - finding dy/dx 1) y = sqrt 4 + sin 10 x - I am lost again 2) y = 10/sin x answer: - 10 csc x cot x 3) y = sin x/ 8x
54. ### physiscs

A 10g sample of an unknown ionic compound is dissolved, and the solution is treated with enough AgNO3 to precipitate all the chloride ion. If 30.1 g of AgCI are recovered, which of the following compound could be the unknown? A. NaCI B. NaNO3 C.BaCI2 D. Mg CI2 E.KCI Pleas help...
55. ### Physics

When you see a traffic light turn red, you apply the brakes until you come to a stop. Suppose your initial speed was 12.9 m/s, and you come to rest in 35.0 m. How much time does this take? Assume constant deceleration. What equation do I use to solve this problem? You can show...
56. ### MATH

I really don't know how to do this, need as soon as possible. Please help! A rabbit population satis es the logistic equation dy dt = 2x10^-7y(10^6- y); where t is the time measured in months. The population is suddenly reduced to 40% of its steady state size by myxamatosis. ...
57. ### Algebra 116

1. Solve using the Elimination Method. 2r - 7s = -57 7r %2B 2s = 39 What is the solution set ______? 2. Simplify -8[-90-(-60-14)]= ______ 3. Solve using the Substition Method. 5x %2B 7y = 41 x = 61 - 8y What is the solution _______? 4. On three consecutive passes, a football ...
58. ### algebra

solve each literal equation for the indicated variable linear equation for x 2x+3y=6 can some one give me a example and show me how the steps go to solve this problem please Subtract 3y from both sides of the equation, and then divide both sides by 2.
59. ### physics

To solve you use y=VoT+aT2. You know that initial velocity is 0 so the fist term can be canceled and y=70. Than you just solve for T and divide 0.25 by T. a is acceration of gravity, 32.2 ft/(s^2) or (9.8 meters/second-squared). T = ?(2y/a) The T will be in seconds. Velocity...
60. ### English

1. Referring to Mike's passage, complete the next passage about the way from school to your house. 1-2. Referring to Mike's passage, write the way from school to your house in the next incomplete passage. (There are two passages;one is Mike's passage, and the other is an ...
61. ### French 1

Sorry my postings did not come through. I am trying again.Thanks I have to rewrite the following sentences replacing the words in parentheses with object pronouns. Am I correct here? Thanks much!!!! 1 J’ai ( mes ingredients) •
62. ### OneMoreTime: S.S.

Sorryy, but we just started talkin bout this todayy in class, ... How did the wayy of life in the Industrial Age impact the population size?? (e.x. method of food production) once again SORRYYY!
63. ### chemestry

Consider once again the magnesium nitride addition reaction from the previous question. This time, suppose you start with 10.0 g N2 and an unlimited supply of Mg. What is the maximum number of MOLES of Mg3N2 that could be produced in this case?
64. ### mgt/230

stuck again. analyze the influence that legal issues, ethics, and corporate social responsibilty have had on management planning at BP Provide at least one example for each help please
65. ### science

apa style again another reference citation Write the correct references citations in the body of the text for the following ...in a number of studies (Harrott and Wilson:2011. Quist and Jones: 2006).
66. ### Math - Algebra

A. Solve the following quadratic equations. Make sure to show all your work. Do not use any method (e.g. factoring, completing the square, quadratic formula, graphing) more than twice. Use the graphing method at least once. 1. 3x+2 + 11x -20 =0 2. x2 + 3x -4 =0 3. 3x2 - x - 1...
67. ### Algebra II- please help!

I just cannot seem to be able to grasp the concept of solving polynomial inequalities. Can someone please explain, step by step, how to solve them? Here's a problem I can't solve. Please use this as an example: (x-2)(x-5)<0 I cannot thank you enough for helping me with this...
68. ### Calculus

I've been trying to solve the improper integral of ln(x)/sqrt(x) dx as a=1 and b=infinity I am required to solve for this question and according to my answer, it is divergent. However, my answer is infinity-4. Is it acceptable to say that infinity minus a number is simply ...
69. ### english

Hi! Does anyone have a very difficult exercise on future tenses (will,going to and present continuous)? Almost impossible to solve? It can be some kind of a text, or typical gap exercise but it has to be for B2 or C1. I have checked almost the entire Internet but everything is...
70. ### Geometry

Solve each equation below by completing the square: 1) x^2 + 6x = 16 My steps: x^2 + 6x - 16 = 0 (x - 2 )(x + 8) x = 2, -8 I set it to zero and factored it out. But my teacher said not do it that way and do it by dividing by 2 but I don't understand how that works. I got the ...
71. ### Math

The Restaurant's two neon signs are turned on at the same time. Both signs blink as they are turned on. One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again ?
72. ### Algebra-Multiple choice

Hello, I have some practice math I'm working through and I'm unsure about the answer. I will also put what I got. Thanks for the help. 1. Solve using any method and identify the system as consistent, inconsistent, or dependent. -2x+y=8 2x+2y=-8 A.) (-4,0); consistent/...
73. ### Math

David refuels his car aﬁer every two days, Mary refuels hers after every four days while Ken refuels his after every eight days. If they all refuel their cars on 3rd March 2013, on which date did they refuel their cars together again?
74. ### Physics

Draw the figure. You have the following equations that you can write: a) Sum Vertical Forces=0 b) Sum horizontal forces=0. Remember that at the upper part of the ladder, there is a horizontal force (only). c) Sum of moments about any point, I suggest the base of the ladder as ...
75. ### algebra

Write and solve a system of equations to solve the problem. At a film festival, Film A is 4 times as long as Film B. Together, the films are 160 min long. How long is each film?
76. ### Algebra I

Write and solve a system of equations to solve the problem. At a film festival, Film A is 4 times as long as Film B. Together, the films are 160 min long. How long is each film?
77. ### English

1. You have to solve the English problems in your own way. 2. You have to solve the English problems on your own. 3. You have to solve the English problems for yourself. 4. You have to solve the English problems by yourself. (Are they all grammatical? What is the difference ...
78. ### English

1. You have to solve the English problems in your own way. 2. You have to solve the English problems on your own. 3. You have to solve the English problems for yourself. 4. You have to solve the English problems by yourself. (Are they all grammatical? What is the difference ...
79. ### MATH HELP SOMEONE

For questions 1 and 2, choose the equation that you can use to solve the problem. 1. 86 is 45% of what number? (1 point) • 86 = 0.45n • n = 0.45 × 86 • 0.45 = n × 86 • 86 = 45n 2. What percent of 26 is 4? (1 point) • 0.26 = n × 4 • n = 0.26 × 4 • 4 = n × 26...
80. ### Physics - Projectile Motion

This is going to be hard to explain, but I did an experiment on projectile motion and we had to lauch a marble from 0 degrees to 90 degrees in a 5 degree interval using a projectile launcher with the same velocity each time. We had to investigate the angle which gave the ...
81. ### Graphs

x + 2y = -4 How do I graph this?can you please help? Assign values to x and solve for y or assign values to y and solve for x. Makre a table. X........Y 0........-2 2........-3 etc. I almost always assign a value of zero to Y, too, and calculate X. Y = 0; X = -4 i don't get it...
82. ### Algebra II

Solve the following word problem. The length and width of a rectangle are (x + 4) cm and x cm. Respectively, a square has the same perimeter as this rectangle. If you add the areas of the rectangle and the square, the result is 94cm^2. Solve for x. Note: Write your answer as x...
83. ### MATH! HELP!!!

I am putting < for the square root abbreviation. I don't know how to use it on my comp. 3<99-2<44-6<11=? For Further Reading On a graphing calculator, the carrot symbol is used to show exponents. that’s what I used here. Solve your exponents first: 3^99, then 2^...
84. ### Math

Hey! So, I've been working on this problem for awhile but I'm currently a bit dumbfounded on how to solve it. I think this question has been answered before but I still don't quite understand how it works or how to explain it. The problem is as follows: |z|^2 -2(complex ...
85. ### Thanks

I would just like to sat thanks to drwls for helping me a bunch with the physics questions...AP physics is pretty hard..thanks again, whoever you are.. I am sure i will be back plenty of times!
86. ### physics

please help me by showing steps thanks Assuming atmospheric pressure to be 1.01 * 10^5 Pa and the density of sea water to be 1025 kg/m^3, what is the absolute pressure at a depth of 15.0m below the surface of the ocean? thanks again:)
87. ### Sra Mcgin +bob pursley

THANKYOU so much for all your help i am sorry that i was going on i was getting confused with the different names. thankyou again i do appreciate it and i am very grateful.
88. ### Physics

A mass of 1.66 kg stretches a vertical spring 0.312 m. If the spring is stretched an additional 0.136 m and released, how long does it take to reach the (new) equilibrium position again?
89. ### chemistry again

calculate the normality of a solution prpared by dissolving 220.0 mg of K2Cr2O7 in 100 ml solution that will be used to oxidize ferrous chloride according to the unbalanced reaction.
90. ### Calculus2

Please, help me I really need help on this problem. Thank you so much for all your help. Question: Find the radius of convergence and interval of convergence for sum(n=1to infinity)(-1)^n-1 multiply by n(x-1)^n/(n^2+1)2^n Thank you again
91. ### Physics

.A mass of 1.61 kg stretches a vertical spring 0.313 m. If the spring is stretched an additional 0.132 m and released, how long does it take to reach the (new) equilibrium position again?
92. ### to ms.sue

thank you again. you have the patients to teach me, a fourth grader. you also don't get tired of answering everyone's questions. you always have the courage to try. thank you so very much!
93. ### French(Again)

do these make sense? 1. Aller a un centre commercial ou un cafe. 2. Ils aller au cineama et faire des videos. 3. Jouer au tennis wet nager.
94. ### chemistry

Hello ellie again. I am still having trouble understanding bombardment. The question I'm working on says Complete the bombardment reaction ? + 40-18Ar → 43-19K + 1-1H
95. ### Algebra PLEASE HELP!!

What advantages does the method of substitution have over graphing for solving systems of equations? Choose the correct answer below. A. Graphing cannot be used to solve dependent or inconsistent systems due to the nature of the lines involved. Substitution can solve these. B...
96. ### math/algebra

cab someone help me? solve by quadratic formula 3x^2 - 5x = -1 I cannot come up with the -5x and get the 1 for factoring. put it into standard form: 3x^2 -5x +1=0 a= 3 b= -5 c=1 x= (5 +- sqrt (25 -12)/6
97. ### Math permutations

pi=(245)(1354)(125) 1) Write as a product of disjoint cycles. Ans: (14)(253) Is this correct? 2) Solve : pi^2, pi^5,pi^(-1) 3) What's the order of pi? and why?
98. ### Math

I have to solve this inequality, but i forget how to do it. I remember your supposed to do something special when your like subtracting a negative from both sides? Y-5>-6
99. ### Advanced math

solve x-sqrt(2x+1)=7 Can someone explain how to work this out. Im not exactly sure how you figure the square root part.
100. ### math

Solve the following matrices (I don't know how to do brackets so I will just use commas to separate the numbers and put them in different lines) A= 0, -2, 3, 1 -3, 1, 0, 4 0, 5, -2, -1 B= 1, -4 -2, 1 3, 0 C= -1, 0, 2 0, 3, 4 0, 8, -1 E= 1 2 3 4 F= -2, 5 3, 7 0, 9 FIND: ) AE = ...