math..solve for u again

158,922 results, page 73

  1. math

    Posted by question on Wednesday, July 22, 2009 at 4:56pm. solve 5/8x + 1/16x=7/16+= the solution is x=___ Responses math - Mr. L, Wednesday, July 22, 2009 at 7:23pm 5/8x is the same as 10/16x That should help my final answer would be 7/27 do i have it right
  2. Calculus

    Here is my problem that I am trying to work on: A rock is dropped from the top of a 300-ft cliff. It's velocity at time t seconds is v(t0= -32 t feet per second. a.) Find the height of the rock above the ground at time t. b.) How long will the rock take to reach the ground? c...
  3. Substitution Method

    Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 x + y = -4 x - y = 2 In the second equation, x= y+2 Putting that in the first.. (y+2) + y= -4 subtract two from each side, then divide each side by two to get y. Then, put that value of y into ...
  4. Stats

    Can someone please show me how to solve this step by step. I'm trying to understand the whole concept but I'm getting confused... Find the sample linear correlation coefficient between x and y: x: 5, 2, 2 y: 7, 4, 7 x^2: 25, 4, 4 y^2: 49, 16, 49 xy: 35, 18, 14 I know how to ...
  5. 7th grade math

    How would you solve the problem below using subsitution method? 7x - 2y = 5 x = y If you could explain and show this step by step, it would help a lot. How would you solve the problem below using combination method? 3x - 2y = 12 -3x + 8y = -6 If you could explain and show this...
  6. English

    Thank you forr your help. It's a great place because I can learn correct english expressions. Would you like to look at the sentence again. 1. I made up my mind to go there. (In #1, does 'to go there' modify 'mind'? Then it's an adjective phrase, right?)
  7. Algebra 2

    Tim paddled his kayak 12km upstream against a 3km/h current and back again in 5h and 20 min. A) what was the speed of his kayak? B) how far could he have gone if there had been no current?
  8. French MS SUE

    To ms sue: I waited all last night but nobody helped me... Could you please forward my French question again? This assignment is due so I don't have very much time left..
  9. Chemistry

    The solubility product constant of Calcium hydroxide is 6.5 * 10^-6 . If 0.10 mo of sodium hydroxide is added to 1 L of 0.0001 M Ca(OH)2, what is the final concentration of the calcium ion? SHOW your work. Again, I have no idea where to start
  10. Physics

    A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed by 3.0 cm in bringing the block to a momentary...
  11. math

    Tony and Tom are brothers.This year both of their ages are prime numbers. Last year both of their ages were composite numbers. Both of their ages will be composite numbers again over the next three years. If Tony and Tom are both teenagers, how old are they now?
  12. math

    Joel and jacob are brothers. This year both of their ages are prime numbers. Last year both of their ages were composite numbers.Both of their ages will be composite numbers again over the next three years. If joel and jacob are both teenagers, how old are they now?
  13. math dealing with varibles

    solve this problem S-46=14 is it... a)34 b)31 c)32 d)none of the above do you know how to solve for S? You want all of the variables (in this case S) on one side and the numbers on the other. We have S on the left side; we leave it there. We need to move 46 to the right side. ...
  14. Math 3

    If you want to be eligible for partial credit, please show your work. Solve the following system of equations using any method. y=1/2x+3 y=1/3x-2 Try substituting the equations. if y=1/3x-2, then 1/3x-2 = 1/2x+3 Solve for x, then plug your solution in for y Does x=4 and y=2 No...
  15. Algebra 1 HELP PLZ!!!

    Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 PLz HELP!! I'M NOT BOB BUT I CAN HELP ITS REALLY SIMPLE ALGEBRA X + Y = -4......EQN 1 X - Y = 2.....EQN 2 From EQN 2, let x = 2 + y Substitute that into EQN 1 x - y = -4 (2+y) + y= -4 2 + 2y= -4...

    Drawls, How did you get 2h. and then the 2a/h from.Can you help me understand it when you get a chance. Directions: Solve each literal equation for the indicated variable. A=1/2h(B+b) (For b) Area of a trapezoid For Further Reading math,algebra - drwls, Monday, December 18, ...
  17. MATHS

    i need a lil help with this If x=2 is a root of the equation 6x^3 - px^2 - 14x + 24=0, find p,hence, solve the equation 6*(2)3-p*(2)2-14*2+24=0 6*8-p*4-14*2+24=0 48-4p-28+24=0 Can take it from here? yes..i got p to be 11. I do not know what else to do from here to solve the ...
  18. Biology

    How can we solve the problems of global warming by using biology technology? In other words, what biology technology helps solve global warming? I can't think of anything. Please help! Thanks You.
  19. algebra

    did I solve the problem correctly? c=$200+$50h c=$300+$25h is the answer c=$250 c=$325 Do all I have to do to this equation is to add them to get the total cost of labor with h=labor per hour and c=cost or do I have to solve it in a different way. I'm sorry for all the ...
  20. math

    what is 10,000lb=_____T 5 tons, since there are 2000 lb per ton. As a follow through to the other post I did for you (cups to pints), note tons=10,000 lbs x factor tons = 10,000 lbs x (1 ton/2,000 lb)= 5 tons. Note again, how the lbs (the unit we want to lose) is gone and the ...
  21. chemistry

    21.90 kJ/g x 0.1182 g = ?q = energy obtained by combusting salicylic acid. Then calculate the heat capacity of the calorimeter. That is q from above = C/degree c x 2.84 and solve for C, the heat capacity of the calorimeter. q = heat capacity x delta T q = Cfrom above x 3.50 ...
  22. Biology again

    could someone explain the importance of replication for maintaining genetic stability? i am guessing that the DNA during replication needs be be copied exactly like before so as to pass on certain genes..but i'm a bit confused and don't know what else to say...
  23. BiOO agAIN

    could someone explain the importance of replication for maintaining genetic stability? i am guessing that the DNA during replication needs be be copied exactly like before so as to pass on certain genes..but i'm a bit confused and don't know what else to say...
  24. For GuruBlue

    Guru, thanks so much for your help with the novel idea; it's the one I chose. I'm in the brainstorming process right now for the novel but after I am done I would like for you to see it except I don't know how since you can't copy paste on Jiskha..anyways thanks a million ...
  25. geometry

    we are a team of students studying for a test - asking again - thanks - An arc ABC is one quarter of a circle with center B and radius 6. Rectangle EDFB is inscribed in ABC. If ED + DF = 8, find the perimeter ADCFE. Round your answer to the nearest hundredth.
  26. English

    Hello. I'll be very grateful for some help again. Do you think it's OK to use "resolve" in the present perfect continuous tense, for example: "they have been resolving the problem for several weeks"? Thank you very much for all your answers.
  27. physics

    a boy standing on the tray of a utility travelling at 5 ms throws aa ball vertically upwads with a velocity of 7.35ms (relative to himself) and catches it again at the same level. what horizontal distance does the ball move while it is in the air
  28. English

    Hello. Thank you, Ms.Sue, again for the answer. Please help me with one more question. Is the sentence OK: "While I'm making coffee, you'll be cutting the cake"? (it's a kind of arrangement) By the way, do I have to use "some coffee" in this context? Thank you a lot.
  29. Maths

    The party of kejriwal walks from gwalior to Bhuvneshwar. They first walk straight for 150km and then turn 45 ddegree towards Varansi and again go straight for 120km how for have they travelled from the initial place. Please show the method.
  30. maths

    2(n-5) = 4 (n+2) Solve the equation is the answer -0.3 ? 2(n-5) = 4 (n+2) Solve the equation is the answer -0.3 ? If the intent of 4 (n + 2) is 4 times (n + 2), Expanding, 2n - 10 = 4n + 8 Therefore, 2n = -18 making n = -9. If the intent of 4 (n + 2) is 4 + (n + 2), n = -9 If ...
  31. Chemisty

    How do I solve what is the mass of a 32.5 mL sample of ethanol if the density of ethanol is .789 g/mL. I know Mass = Density * Volume. So 32.5 mL * .789g/mL = the mass, but I don't know how to solve that.
  32. MATH

    A women is taking a lesson in a circular swimming pool. she starts at one edge of the pool and swims for 12 meters in a straight line till hits the edge of the pool. she turns and swims another 5 meters and again hits the edge of the pool. she realizes that she is exactly on ...

    It's Me Again, Karen is standing near a flagpole that is 12 feet tall. Karen is 5 feet tall, and the length of her shadow is 4 feet, as shown. What is the length in feet of the flagpole's shadow? PLZ HELP!
  34. Computer

    How do you solve this algorithm problem? Suppose that you are given a sequence of n elements to sort. The input sequence consists of n/k subsequences, each containing k elements. The elements in a given subsequence are all smaller than the elements in the succeeding ...
  35. 6th grade math

    Can you check these inequalities? 1. Chancellor is saving $15 each week for at least n weeks to buy a skateboard that cost $150. Write an inequality to represent this real life situation. Ans: 15n >= 150 2. Write an inequality to represent the possible speed allowed fi the ...
  36. math

    can someone show me how to solve this problem. It determines that in order to sell x smartphones, the price per product must be p=280-0.4x. It also determine that the total cost of producing x smartphones is given by C(x)=5000+0.6x. a. Find the total revenue, R(x). b. Find the...
  37. Calc Help

    demand = (p+1)sqroot(q+1)=1000. Find elasticity of demand at a price of $39 per unit. I am really struggling with this problem is there anyone that can help me? i am not familiar with the terminology, but if you are trying to solve for p, it is not that hard (p+1)√(p+1...
  38. Math Project..Please help me..

    1. Samuel is 2/3 as old as his brother. In five years, he will be 3/4 as old as his brother will be. Find their present ages. a. If x = the brother’s age now, write an expression for Samuel’s present age in terms of x. b. Write an expression for the brother’s age in five...
  39. Math Inequalities

    -9/8x greater than or equal to -1/16 can someone please check my answer? my answer is x greather than or equal to 1/18 is this correct? if not what is the correct answer and what is the correct way to solve this problem..maybe I missed a step or did not do math correctly....
  40. Math - Ratio or Proportion (I think??)

    Hello, I'm looking for guidance on how to solve these two problems below. I think they are proportion or ratio problems, but I am not sure. 1. If 6 pounds of meat feeds 3 people for 5 days, how much meat is required to feed 5 people for 7 days? 2. If a dress that is made out ...
  41. MATH

    Please someone get back to me! I really don't know how to do this, need as soon as possible. Please help! A rabbit population satisfies the logistic equation dy dt = 2x(10to the exponent 6)y(10to the exponent6)- y; where t is the time measured in months. The population is ...
  42. math

    Solve for x in the figure if AB=5x-5 and BC=2x+3. You need to provide additional information on how AB is related to BC before we can help you with that question. Perhaps that is what the missing figure is supposed to show.
  43. i need help..algebra/math

    solve by using the quadratic formula: x2 plus x minus 2 equal 0 I know the formula is a=1 b=1 c=2 I'm having trouble solving...please help.
  44. Math x-int's

    How do I algebraically find the x-intercepts for this equation y = x^3 - 3x^2 + 3. I know I need to plug in y = 0 to solve for x. x^3 - 3x^2 + 3 = 0 But where do I go from there? I don't think I can factor, and I don't think I can use the quadratic formula.
  45. functions math

    hi can any one please help me solve this question? logbase2x+logbase2 3= 3 i factored the left side but i have no idea what to do with the right side.
  46. math

    to solve an equation, it is sometimes helpful to ____________, the original operation. a. redo b. undo c. imitate d. expand I believe the answer is undo B
  47. the subject with numbers

    Julie is paid a comission of 3% on all sales. Last week, she earned $82.74. What were her total sales? How do you solve this math question? Please and Thank you!
  48. math

    Solve the problem. A cruise boat travels 48 miles downstream in 3 hours and returns upstream in 6 hours. Find the rate of the stream.
  49. Math

    I need someone to check and go over my answers to make sure they are correct and if not could you go over them with my on why and how to solve correctly?? Thank you much appreciated.. Add. -4/5 + (9/20) = 5/25 1 + (-2) + 3 + (-4) = 10 5/3 + (-4/3) + 5/3 = 6/3
  50. Math

    I need someone to check and go over my answers to make sure they are correct and if not could you go over them with my on why and how to solve correctly?? Thank you much appreciated.. Add. -4/5 + (9/20) = 5/25 1 + (-2) + 3 + (-4) = 10 5/3 + (-4/3) + 5/3 = 6/3
  51. math

    Me and my mom are having an agrument about how to solve this problem. 27 / (5+4) * 19= she says the answer is 57 and I say the answer is 6 with a remainder of 9..can you please tell me who is right. Thank you.
  52. math

    Solve by elimination method. 2r-5s=-33 5r+2s=48 I keep getting different answers... I can never get these right.... so first I multiply the first equation by 2 and the second by 5?
  53. College Math II

    Solve by any method. x(x + 1) = 12 I am not sure what method to use to show my work and figure out the answer. Can someone help me understand this problem. Thanks.
  54. Math

    how to solve: In a survey at a supermarket, 78 out of 120 people surveyed said that they shopped more than once a week. What percent of the people is that?
  55. Math

    how to factor this equation algebraically? 2a^2-84a+70 Thank you for helping me and any help given will be greatly appreciated. And to solve this you probably have to use the factor theorem.
  56. math

    I am bouncing this questions for an hour now and still have not come up with answer I believe in. Can you solve for a variable in an equation? Explain the answer Can you help?
  57. Math

    are these right? im suppose to use like terms. 5z + 2(x + 3) - z dont solve it just simplify it. please give me a step to step process?
  58. math

    Please solve -2x+7>22 -2x+7-7>22-7 -2x>15 -2x/(-2)<15/(-2) Switching the order of the inequality here is essential to keep the solutions true for the inequality since I divided by a negative #. x<-7.5
  59. math

    hi i need to solve this question but i don't know how to do it when there is dividing included x(x-8):5=92 i did this much and then i found out that what i was doing was wrong x(x-8):5*5=92*5 2x-8=460 2x=468 x=234 but it seems wrong
  60. math

    I am a number between 20 and 30.When you put me into 6 equal groups,there is an even number in each group and 1 left over. i cant figure out how to solve this
  61. math

    you save 6 dollars on monday.each day after that you save twice as much you saved before.what table can i make to solve?please help!!!!!!!!!!
  62. math-matrix

    solve using the gauss-jordan method. x-2y+4z=7 -x+3y-z=-1 2x+y=-2 *I get through the first two columbs, but can't get the third one to the one and zero.
  63. 8th grade math

    I need someone to explain how to solve equations with two variables and tell me what the formula or equation is? Please help and explain. Thank you!
  64. Math

    Solve the compound inequalities. Write the solutions in interval notation. Graph your solution on a number line. 1. 2(3x + 1)< -10 or 3(2x - 4) ¡Ý 0 The or means union of these inequalities. 2. 5(p + 3) + 4 > p - 1 or 4(p - 1) + 2 > p + 8
  65. math

    If evelyn practices the piano for 45 mins every day, how many minutes does she practice the piano in one year? Please solve. Thx
  66. compound inequality

    solve the compound inequalities show all math work arriving at the solution display a simple line graph 1-x>-3 or 5x-1>19
  67. Math

    Please help me solve this!! I'm really struggling with this topic Write an equation in slope intercept form with a y-intercept of 1 and is parallel to the given line
  68. Math

    Hello I am having trouble with a pre-calculus problem. The problem is ln|Sin2X-CosX-1|=0 if you could help by listing the steps to solve that would be great! Thanks!
  69. math

    idk if this is supposed to be common sense but, i need help understanding why when i make this equation solve for (y) that there is a plus/minus answer. (yx)yx = 2x y = .5(sqrt(2x)/2) y = .5(-sqrt(2x)/2)
  70. Math help

    How would you solve these systems by elimination? I'm in desperate need of help! 1. -35x-15y=0 -56x+24y=0 2. -56x+72y=-16 -49x+63y=-14
  71. math percents

    How do I solve this problem without calculator? I keep coming up with 270 but the calculator says 275 Thirty-three is 12% of what number?
  72. Math

    5. Solve the proportion using cross product 18/20 = k/110 A. 99 (my answer) B. 122 C. 33 D. 2.9 (my answer) The reason why I picked 2 of them were because I'm stuck between the two
  73. math

    A box contains 12 lightbulbs. Find the number of ordered N samples of size 3: (a) with replacement (b) without replacement Also, please do Not solve.
  74. math question

    How do i solve a problem like this? I took a study guide and i messed up on some problems so can i get some help on a few that i missed so i can know how to complete them??
  75. 7th grade math

    A large carton of juice holds 12 cups. How many 3/4 cup servings does the carton hold? I'm not sure how to solve it at all.
  76. Math

    How do you find decreasing intervals of 6x^3-63x^2-144x-2? I found my increasing intervals from placing the derivatives i just can't seem to solve for the decrease
  77. math

    Good evening. I do not know how to solve this kind of problem. Could someone help me. Find both x-intercept and the y-intercept of the line given by the equation for 2.4x+2.9y+6.4=0 Thank you for your kindness.
  78. Math

    a lottery game has balls numbered 1 through 19. What is the probability of selecting an even numbered ball or a 4? Its hard one please anyone know how solve?
  79. Math

    How many 3-digit numbers can be formed sing the digits 0,1, 2, 3, 4, 5, 6, if repetitions are not allowed? however 180 can't be the answer i checked? any one know how to solve this one
  80. math

    how can I solve: 6³ + 6 ÷ 2¹ - 4² I got the answer wrong on the test and the teacher told me the answer was 203 but I want to know how to do it. I was to embarrassed to ask because all the other students knew how to do it
  81. Math

    Our difference is 6. We have a sum of 14. What numbers are we? We know number 10. How did you find 4? Please describe and solve the riddle.Write the number sentence.
  82. Math

    I've been really struggling with this question, could someone please walk me through it. x+y=0.4276 (so, y=0.4276-x) x/23.947+y/56.105=0.01034 Solve for x.
  83. 8th Grade Math

    The value of y varies directly with x. When y = -12 1/2, x = 50. What is the value of y when x is 11 3/4, rounded to the nearest hundredths? Can someone please show me how to solve this problem?
  84. Math- HELP!

    If a population of fruit flies doubles every 3 days. What is k, the proportionality constant? How would I solve this problem? What would initial value be?? Thanks!
  85. Math

    The corners of a square lie on a circle of Diameter D = 0.35m. Each side of the square has a length L. Find L. - I'm not quite sure how to solve this problem
  86. Math please help!!!

    Solve the system of equations to find x,y,z (hint let d=x2 e=y2 and d=z2 . Find d e and f first) 2 means squared I don't have it on my keyboard. X2+y2+z2=9 3x2-y2-z2=7 Y2+2z2 =6
  87. Math

    Write and solve an equation for each of the following. Triangle ABC is congruent to triangle DEF. AB = 2x - 10, and DE = x + 20. Find the value of x and AB. I don't even know where to begin, please help.
  88. math

    I need help finding x for this equation e^x (x^2 + 4x + 2)=0 thanks. e^x = 0 or x^2 + 4x + 2 = 0 the first has no real solution (actually x would have to an infinitely large negative number) The second is a quadratic, use the formula to solve it.
  89. English writing

    From earlier I posted a question on how to write a thesis from the topic What is your favorite piece of furniture?Explain. When I sit in my recliner chair it helps me to solve math problems.
  90. math-help solve please

    find out how long it takes a $2700 investment to double if it is invested by 7% compounded semiannually. Round to the nearest tenth of a year . Use the formula A=P[1+r/n]^nt
  91. Math

    Bob wants to start a lawn in an area that is 110ft by 70ft. One bag of seed covers 1200 square feet. How many bags should he buy? Please help me solve
  92. Math

    Write an equation in standard form for the line whose slope is undefined that passes through (5,-3) Please help me solve, my answer is 5x-3y=0... It was marked wrong and i can not seem to figure it out.
  93. math sequences and series

    how do i solve if t1=1/2 and tn=tn-1+1/n(n+1), determine an explicit formula for the general term. (hint: it is neither arithmetic nor geometric. write out the first few terms)
  94. MATH C30

    Solve cosxtanx + sqroot3cosx - sqroot3/2tanx - 3/2 = 0 interval 0 to 2 pi exact answers and formula for the general solution as well as the specific solutions. Sorry Steve, missed it last night.
  95. math

    The diameter of a lead pipe is measured to be 2.40 cm and you are asked to convert to units of inches. Which of the following conversion factors can you use to solve this problem? Answer 12 in = 1 ft 100 cm = 1 m 3 ft = 1 yd Two of the these ?>None of these
  96. math

    In a science experiment, the temperature of a substance is changed from 42°F to -54°F at an average rate of -12 degrees per hour. Over how many hours does the change take place? **Write as an expression and solve THANK YOU!
  97. Math

    the questions says if carlos eats 1/2 icream every night for dessert. He has 3 cups left. How many days can he eat a 1/2 cup before running out. How do I solve this problem
  98. Math Questions

    Find Part of a Group Use a model to solve. 7/8 x 16= Answer: 14 8x2=16 7x2=14 6/10x10=6 10x1=10 6x1=6 Please let me know if I have the above answers correct? Thank you
  99. Algebra 1

    Solve by completing the square: A rectangular patio has a length of (x + 6) m, a width of (x + 8) m, and a total area of 400 m2. Find the dimensions to the nearest tenth. Please help me with this math problem. Thanks so much.
  100. Math

    Two equal corcles intercept each other. Find the area of the overlapping region, if the radii of the circles are 10 cm each and the distance beten centers also equals 10 cm. How do i solve this? Thank u in advance.
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