math..solve for u again

159,056 results, page 62

1. math

solve the quadratic equation 5x^2+5x=2 so far i have -5+/- (Radical sign) 65/10... how do i simplify that i know it should be two different real solutions
2. Math

lim (as x approaches infinity) (x^2-1)/(x^2+1) How would you solve that by using algebra? I can simplify the above because it is difference of squares. But then what about the bottom
3. Math: Calculus

Consider the function f(x) whose second derivative is f''(x) = 8x + 4sin(x). If f(0) = 2 and f'(0) = 2, what is f(x)? I got... f'(x)=4(x^2 - cos[x]) and f(x)=(4(x^3 - 3sin[x]))/3 but it's wrong. Can anyone explain to me how to solve this.
4. Math

How do i solve using the elimination method. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140
5. math

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.2x + 2y = 202x – 2y = 4
6. Math - 2

Solve the exponential equation. Express your solutions in exact form only. Please show all of your work. (e^(2x) – 10e^x) / 13 = 3

solve for x in a given interval using guess improvement stategy. express to the nearest tenths. cos x=1/x, -4<=x<=0
8. Math

A wooden duck with a regular selling price of \$125.99 is marked down to \$79.99. The percent of markdown is: Answer: 36.51% What is the formula? How to solve this?
9. math

i need help to solve an algebra question which is if liu drives for x hours,which expression gives the number of miles he willl travel?
10. MATH

Write a two-step equation that needs the steps of addition then multiplication in order to be solved, and then solve it. Show your work.
11. Math

Use the compound interest formulas A = P(1 + r/n)nt and A = Pe^rt to solve. Find the accumulated value of an investment of \$3000 at 9% compounded continuously for 3 years.
12. Algebra

Find all intervals on which the given expressions are positive. (x-1)(x+2) I know the answer is : x<-2, x>1 please show me the steps on how to solve this math problem.
13. math

I need to use calculus to solve this word problem: Find all maximum and minimum values for f(x)= sin(x)+ cos(x) on [0, 2(3.14)] How do I do it?
14. math,algerbra

find circumference and area of circle use 3.14 for unknown round to nearest tenths. 2) r=11.5 3)d=3.5 show steps to solve

i have a test tomarow and i am soo lost with this this question is on my review sheet 16^2 = 2^x how do i solve this tell me in detail plz ty :)
16. Math

Solve Mentally with conversion to decimals, no calculation of common denominators. Place the following in ascending order(smallest to largest) 1/4 8/9 7/10 9/21 7/16 2/3 2/47 5/6 3/4 3/5 1/13 1/8
17. math

You are given that a function f is defined and continuous at every real number x except x=2. Also, f(x)=0 precisely for x=1 and 7. Finally, you know that f(-3)=4, f(1.5)=2, f(4)= -3, and f(10)=6. Solve the inequality f(x) > 0.
18. Math

Solve the inequality. Explain all steps and identify the properties used. n/-3+5>4 Pleasr help I can't figure this out and my grade depends on it
19. Math, science, trinogonomentry

1, solve triangle ABC which have angleA= 250.251 angleB=600.511 and a=3.82 find c
20. Math, science, trinogonomentry

1, solve triangle ABC which have angleA= 250.251 angleB=600.511 and a=3.82 find c
21. Algebra 1

Hi! I'm doing my math homework, but I got confused. Can someone please help me how to solve simplest radical forms with an example? With square roots?
22. Math

I'm extemely lost at some point, how do you solve this equation by using the inverse of the coefficient matrix and by echelon method -x-8y=12 3x+24y=-36
23. Math

Hi could you please solve this as quick as possible, thanks. A tree 34 m high cast a shadow 12 m long. The angle of the inclination of the sun is closest to: A 70 B 21 C 69 D 19 E 79 Thanks
24. math

Paulo has \$6 to spend. A sundae costs \$3.25 plus \$0.65 per topping. Write and solve an inequality to find how many toppings he can order.

Multiply. Write each product in simplest form. 1. 2 3/8 * 1 3/5 = 3 4/5 2. 1 1/5 * 3/5 = 18/25 3. 1 5/6 * 2/3 = 11/10 Do I have the correct answers? If not can someone show me how to solve them?

Multiply. Write each product in simplest form. 1. 2 3/8 * 1 3/5 = 3 4/5 2. 1 5/6 * 2/3 = 11/10 3. 7/8 * 3 1/3 = 35/27 Do I have the correct answers? If not can someone show how to solve them?
27. Math

Solve the quadratic function y=2x^2-14x -16 by completing the square. Round roots to the nearest hundredth, if necessary. Show your work.
28. math

just a question i have about solving indirect measurements. when you set up your ratios do you cross multiply and then solve for x by dividing?
29. Math

Hello! Can someone help me with this? Directions: Solve the equation sin^2x-sinx=2 Location on Unit Ciricle: Period: General Solution:
30. Math

Mixed Rationals: Solve these question in two or three steps: 879 + 47/22 4591 - 133/61 -1 + 17/13 -68 - 18/7 -1297 + 763/512 Thank you!
31. Math

Solve the following equation with complex numbers and the quadratic formula : 7x^2-4x+2=0 My answer is 4+- 2i√10 ________ 14 My only question is Can this be reduced ?
32. Math

if the temperature starts at 0°f and drops 2 degrees an hour, how many hours would it take it to reach -8 °f? write a number sentence and solve.
33. Math

How do I show that the sum of 3 consecutive odd integers is a multiple of 3? Can you please help me answer this question? My teacher didn't explain on how to solve it very well.
34. Math (just need some help)

Solve the system using an augmented matrix. -x-3y=-17 2x-6y=-26 Can someone please explain what I am supposed to do in this problem?
35. math

two number cubes are rolled. what is the probability of getting a sum less than 5? 68/100 =0.68=68% ?? can you explained how to solve showing steps.
36. Math

24. solve the system of equations algerbraically. show all of your steps. (2 points) y=x^(2)+2x y=3x+20 I'm just having trouble understanding. Please help
37. Math (ugh)

Solve the problem. Make sure your answer is in simplest form and improper fractions are expressed as mixed numbers. 3 3/4 x 2 4/5 = ?
38. Math

Use front-end estimation to estimate the sum to the nearest whole number. 13.40+36.63+125.042 How do I solve this question?
39. Math

Solve the function 2(9^x) - 5(3^×) = 12 So what I did So far is changed it into log functions: 2(9^x) = 12 9^x = 6 Log9(6) = x And then 5(3^x) = 12 3^x = 12/5 Log3(12/5) = x So then I don't know how to subtract them because they have different bases :/
40. pre algebra

Tell whether the events are independent or dependent. Then find the probability. You roll a 6 on a number cube. Then you roll again and roll a 2.
41. algebra

solve 4^3x-4=32^x+2 Please help! Do you mean 4^(3x) -4 = 32^x +2 ? yes If that is really what you mean, I cannot get a closed-form solution for you. You would have to solve it by trial-and-error or graphical means. If, on the other hand, you mean 4^(3x-4)=32^(x+2), then take ...
42. MATHS

Solve the following equations if 0<x<2pie (those are 'less than or equal to') answer to 2 decimal places. a) square root of 2 cos(x = pie/2) + 1 = 0 b) sin(1/2)(x-2pie/9) = 0.6 a) sqrt 2cos(x-PI/2)=1 square both sides, then solve. b) sin(x/2-PI/9)=.6 x/2= arc sin .6 + PI/9
43. math

NOTE: this is for advanced functions, NOT physics A 2m length of board rests with one end on the floor and the other end on a small stack of bricks. A baseball is rolled up the board and back down again in a total of 4 seconds. The farthest the baseball reached on the board ...
44. chemistry

My work: pH = -log(x) = 4.49 x = 3.2359e-5 3.2359e-5 = 5.72/M When I solved for M, I got that large number... 176764.8987 Ka for a given weak acid is 5.72 x 100. What concentration of acid (mM/L) will give a pH of 4.49? I got 176764.8987 M (not converted to uM). Though I am ...
45. algebra 2

i need help with my algebra 2 homework, the section is called using matrices to represent data. here is one of the problems: -1/2A+(B-A) A=[7 3 -1 5] [-2 8 0 -4] and B= [6 0 11 -3] [-5 2 -8 9] i don't know how to do this problem and the book doesn't have a problem like this ...
46. trig 30

Please help I need to solve the following question for x, where 0<x<2pi. and then write a general solution for the equation. The question is 2cos^2 x + cos x =1. I need to solve this using radian measurement. I solved it using algebra and was told I wasn't allowed. Could...
47. Math

Al can paint a room in a hours working alone. Bill can paint a room in b hours working alone. Working alone, Bill takes tow more hours to paint a room than Al. Working together, they can paint a room in 8 hours. Write down a system of two equations involving the variables a ...
48. College Algebra

Solve the system of equations using matrices. If system has no solution say its inconsistent. 6x + y = 5 3x - y + z - w = 8 z + w = 2 Solve the system of equations using Cramers Rule if applicable. 4x + 2y = 8/5 5x - 5y = 5
49. 5th grade math (word problems)

I'm not sure how to solve the following problem: If you divide 1/10 of a dollar into parts that are each 1/100 of a dollar, how many parts are there? What are they called? To solve, would part of the answer be that i would have 10 parts of 1/100 (because I divide 100 by 10 and...
50. Algebra

Rod is a pilot for Crossland Airways. He computes his flight time against a headwind for a trip of 2900 miles at 5 hr. The flight would take 4 hr and 50 min if the headwind were half as great. Find the headwind and the plane’s air speed. Please help me solve. I'm unable to ...
51. Algebra 2

solve the equation: log(base2)^(x-3)log(base2)^5 = 2log(base2)^10 I don't know how to solve it, can someone help me? Please and thank you.

If a * b = a - 3b and a # b = 2a + 3b, evaluate the expression (4 * 3) # 5. If y # y = 2x + 3y and x * y = 5x + 4y, evaluate the expression 2 # (4 * 3). Please help! Try to explain how I should solve these - don't just give me the answer. These problems showed up in my math ...
53. Finite Math - Simplex Method

I think I have a good understanding of how to set up the problems but and solve them but I am not constant yet with getting the correct answer. Is there a way to check the answer? I am doing an online math class and it would be nice if I could check before I commit. Thanks
54. math

I have 209.2 cups of cupcake batter in a bowl. If each cupcake uses 4 cups of batter, how many cupcakes can be made? How many times bigger do the divisor and dividend need to be in order to solve this problem? I divided 209.2 by 4 and got an answer of 52.3 cupcakes. I just do ...
55. statistics

Give examples of nominal, ordinal, interval. and ratio data. Then, convert your ratio data example into interval, ordinal, and nominal scales. Measurement Scales Practice 1. Indicate the first letter (N, O, I, R) of the highest possible scale for each of the following measures...
56. Algebra 2

would some one please check these for me 1. divide x^2-36y^2 over 5x^2+30y divide (x^2-6xy) A: x+6y over (5x)(x^2+6y) 2. Add. Express your answer in simplest form. 2x 0ver x^2+15x+54 + 4over x+6 A: 6 over x+9 3. solve: (9 over x-5) -1= 8 over x+5 A: -10 and 11 This one I am ...

For the given function, compute the missing values in the following table. f(x) = 8x i got the negatives wrong, but I know how to solve for it. Is there a reason it is wrong? -3: -1/512 -2: -1/64 -1: -1/8 (^These were wrong, but I don't know how to solve it) 0: 1 1: 8 2: 64 3...
58. ALGEBRA

Solve by setting up the proper equation to describe the facts given and then carrying out the mathematical calculations to solve for the unknown variable(s). The length of a rectangle is 3 times the width. The difference between the length and the width is 8 feet. Determine ...
59. Math

In 1990, the population of Cheyenne, Wyoming, was 73,142. By 2000, the population had increased to 81,607. Write and solve an equation to find, the increase in Cheyenne’s population from 1990 to 2000. Mercury’s surface temperature has a range of 600 digress. This range is ...
60. math,correction

Solve each of the following equations for x. Problem#1 (x)/(6) - (x)/(8) MY answer: x = 24 Problem #2 (x)/(x-2) - (x+1)/(x) = (8)/(x^2-2x) My answer is: 6 = x or x = 6 right on the first one. check your math on the second one. i've done it twice and both times got (-10).
61. Math

Warren walked 4 kilometers down east and then 5 kilometers down south. Next, he walked another 4 kilometers down east. Then he turned again, and walked 5 kilometers down south. He stopped there. To the nearest kilometer, how far is he from the starting point?
62. Math

Hi, so I was wonder if y'all could help me? That would be really awesome. Thanks! 1. x/-10 > 6 - x > 60 - x > -60 - x < -60 - x < -4 2. 5z (underlined >) -75 - z (underlined <) -15 - z (underlined <) 15 - z (underlined >) -15 - z (underlined >) -...
63. Math

I need help,my example: The sales representative say there are two floor plans available 56 total houses. Use x for floor plan 1 and y for floor plan 2 then write an equation that illistrates the situation. So I thought x+y=56, then sales rep. says there is 3 times as many ...
64. Math

What is a good math website which'll help kids aged 5-6 learn? I want a website that shows you how to solve problems step by step. Problems such as addition and, subtraction. Thank you in advance.
65. Math

The math question is "in a piggy bank there is a total of \$15.75. If the ratio of dimes to quarters is 5:7, find the total amount in quarters. My question is, what formula would I use to solve this?
66. Chemistry

Can you please help me to work out the addreviated structural formulae of hydrolysis of tocainide? Won't it be the -NH2 group that hydrolyzes? ArNH2 + HOH ==> ArNH3^+ + OH^- Check my thinking. Thanks That is exactly what I thought it would be. Thanks again DrBob.
67. sra McGuin

Hi - where would I scan these to - thanks again my child thinks you are the best - nice to see people who make such a positive impact on kids. 9th grade and all honors classes is tough.

can you give me a sentence for each of these words? thanks 1. swaggering 2. poignant 3. compelling 4. intriguing 5. riveting 6. edification 7. mesmerize 8. decibel 9. teleportation 10. damsel 11. rubbish 12. tattoo 13. optimum 14. cretin 15. subtle Thanks again!
69. Biology

I'm stuck on these 2 questions..please help in any way! Thanks 2. How can genetic altering benefit the society of today and future societies? 6. What other areas of life could this manipulation of genes cause? Links would be of great help, or suggestions. Thanks again -MC
70. English

Could you please check this sentence I need to include in a letter? 1) Thank you very much for your last e-mail. Unfortunately, I couldn't read the document attached to it. 2) Actually, it was blank. Can you post (send) it to me again (once more, another time).
71. Enlish

Hi it's Bernie again. Does this sentence look correct with the quotation marks and comma. Harold wrote, “I regret that I am unable to attend the fundraiser for AIDS research." His letter however, contained a substantial contribution.
72. English

Which sentence has no direct object? A. Read me those directions again, please. B. Can you return this book by tomorrow? C. I just told Janice to call me tonight. D. Hank spoke to the audience for an hour. I think D..
73. geometry, thanks

I just wanted to thank everyone that helped me on my geometry problem. I actually found the answer using the pythagorean theorem and knowing ratio rules that apply to triangles. Thanks again.
74. history

Nobody won World War I because the Central Power surrendered except Germany, but Germany was later forced to sign the armistice. Is this a question, or what you believe to be true? If so, think again.
75. algebra

I'm having trouble getting the symbols to post correctly on this page so let me try this again..... 3(7+2x) ¡Ü 30+7 (x-1) The answer to this inequality problem is x x ¡Ý-2 -2 I can't figure out how they got this answer. Can you show me the steps?
76. physics again.

A boxcar of mass 200 tons at rest becomes uncoupled on a 2.5 degree grade. If the track is considered to be frictionless, what speed does the boxcar have after 10 seconds?
77. physics

If you weighed yourself on regular bathroom scale outside, then again inside the Empire State Building and inside your weigh about 350 grams less, why would this be?
78. Science

What makes flatulence stink? Is it a gas or something? And why is it necessary to flatulate? Thanks -MC PS>>>Are there any science websites for children with fun facts and games? I need one for the library I volunteer for. Thanks again :D
79. Math

Please forgive me, but I am appealing to you to please solve these 6 problems for me in the most simpler of steps that I can use to practice. Thanks so much. Garnett 1. Purchaser applies for an FHA loan to buy home for \$102,000. FHA guarantees 97% of first \$25,000 of purchase ...
80. SCIENCE AGAIN

Thanks so much for all your help. These multiple choice questions always have me confused. Here goes: The density of fresh water either a.)reaches a maximum at 4 degrees C, b.)decreases with decreasing temperature below 4 degrees C, c.)increases with decreasing temperature ...
81. 8th Math - Probability

A basket contains 5 green lollipops, 12 red lollipops, and 7 orange lollipops. When a lollipop is taken from the basket, it is not replaced. What is P(orange, then orange)? I know the answer. It's 42/552. But HOW do I figure this out? I can do the first p(orange) but if it's ...
82. math

you have deposited 1000 dollars in your savings account with n annual interest rate of 4 percent compounded monthly. how much money are you going to have in your account after six months? [(1+ 0.04/12)]^6 x 1000 = ?? is the answer 1020.164? You got it. well theres another part...
83. algebra

Solve the system by graphing. x + y = 4 –x + y = 2 confused where do i start do i need to solve for x and find points I'll bet that after doing a few like this you would be able to do this one in your head. just add then up. The x's will cancel and you will have 2y = 6 so ...
84. Math And Science for Young Children

The conventional problem-solving strategies usually taught have been: A. act out the problem, make a drawing or diagram, and solve the problem. B. look for a pattern, construct a table, solve the problem, and look back. C. understand the problem, devise a plan, carry out the ...
85. Animal Physiology-Membrane Potential

Intracellular Extracellular Na+ 12 mM 160 mM Cl- 7 mM 110 mM K+ 140 mM 5 mM 1.How do you calculate the equilibrium potential for potassium, K+, under these conditions? 2. Assuming that Na+ is the only ion the plasma membrane of this cell is permeable to, at what voltage will ...
86. Chemistry

Problem: Calculate the pH titration of 50 mL of 0.02M H3PO4 from pH 1 to 13 with 0.4M NaOH. So I believe the balanced reaction is: H3PO4 + OH --> H2PO4 + H2O (Since Na I believe is insignificant, maybe that's wrong. If so then, H3PO4 + NaOH --> NaH2PO4 + H2O) ICE table...
87. math

Mrs. Cason gives her class a spelling quiz every Monday,and a history quiz every third Monday . Sally smarty is in Mrs. Carson's class. She received a grade of 100% on all three quizzes today. How long will it be before she again has to take all three quizzes in on day?
88. pre-cal

Solve. (sqrt. x + 1) - (sqrt. 2x -12) = 1 The answers I reached were x = 8 and 24. If you plug in 8, you will get 1 as an answer. If you plug in 24, however, you will not get 1 as an answer. Please see if 8 is the only solution. If not, please show me how to solve to find the ...
89. Math

Γ 1 is a circle with center O 1 and radius R 1 , Γ 2 is a circle with center O 2 and radius R 2 , and R 2 <R 1 . Γ 2 has O 1 on its circumference. O 1 O 2 intersect Γ 2 again at A . Circles Γ 1 and Γ 2 intersect at points B and C such that &#...
90. Calculus

If any body can solve this I would be greatly appreciative. I spent an hour in the tutoring center and no one could solve. Here goes: A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed of 1.6 m/s, how...
91. Algebra

One number is 6 more than another number and their sum is 2. Whats the equation for that. x = one number y = another number =============== x + y = 2 x -6 = y solve for x and y x=first number y=second number x=y+6 x+y=2 you can then solve these two equations for x and y... ...
92. algebra2

Solve the matrix equation: 4 -5 m 32 1 2 * n = -5 if you meant this │4-5│ │m│ │1 2│ │n│ = │23│ │-5│ then this would result in the following two equations. 4m-5n=32 m+2n=-5 solve these for m and n, I got m=...
93. Differential equation

y′=8e^(4x)(1+y2)solve for y(0)=−2 ⇒ y= I tried to solve the problem and got the equation: tan^-1((2e^(4x)-2+tan(-2)))it says I am wrong and I resolved and got the same thing I must be doing something wrong please help!
94. Trigonometry

Solve from [0,2pi). cot^2(4x)tan(2x)-tan(2x)=0 How do you solve this (step-by-step)?
95. Alg 1

Graph -4x+y>-6 5y<=-x-20 Then give 2 ordered pairs that solve it& 2 ordered pairs that don't solve it
96. algebra

Show how you would solve by Substitution: 2x + y = 0 x – 3y = -7 Show how you would solve by Elimination: 3x + 4y = 1 5x – 3y = 21
97. Mathematics

Solve the quadratic equation 3x²=27 Solve the quadratic equation 2x² - 4x + 1 = 0
98. helpppppppp

I have this problem abouth math pre algebra this is my problem I have 3 number that makes a total of 11 I have 1 4 6=11 in each way has to came out 11 up down side across and I have 2 more blanck spaces total of 3 its big square need help and I cant use the same numbers over ...
99. Math Probability

A math class has 20 students who choose a topic from a list for an essay. How big pool is necessary for the probability of at least one duplicate to drop below fifty percent? I understand it is like the birthday problem, I just do not understand how to solve it still.
100. geometery

Can you solve this problem: Identify the letter of the choice that best completes the statment or answer the question. Note: Since there is no symbol on the keyboard for the right angle sign I will use the greater than sign(<)right angle. The greather/less than sign for the...