Math(Please help)

188,810 results, page 90

  1. Chemistry

    Calculate molarity of HNO3 please help? Calculate molarity of HNO3 prepared by dissolving 22.3 grams of HNO3 in water to make 875 ml of solution... Please help I'm stuck
  2. Algebra please help

    1.(9m+6)+(-5m-6) A:4m+12 B:14m+12 C:14m-12 D:4m*** 2.(3r²+7r+1)+(4r²-8r-2) A:7r²+15r-1 B:7r²-r-1*** C:7r²-15r-3 D:-r²-r-1 3.(6h+1)-(9h+4) A:-3h-3*** B:15h-5 C:-13h+3 D:-3h+5 4.(m²-m-4)+(m-5) A:m²-2m+9 B:m²+2m-9 C:m²-2m-9 D:m²-9*** 5.(4x+4)+(3x+2+1) A:7x+3 B:x+7 C:7x...
  3. Math-please help

    A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble? 2. What is the probability of selecting ...
  4. Math

    As you can see from my nickname, math and I don't have great history. That is why I would like someone to check my answer. Q: Samantha types 40 words per minute. How many words can she type in 8 minutes? My Answer: 320 How I got to this: This question wants me to do ...
  5. math

    1.solve for the given variable: x + 1/2 = 1 1/2 3/4 1*** 2 3 2. solve for the given variable: 10/13n = -30/39 -20/13 0 100/169 -1*** 3. solve for the given variable: k-3/4 = 10 43 5.5*** 37 52 PLEASE HELP ME WITH MY MATH!!!!

    A fire hose held near the ground shoots water at a speed of 6.5 m/s 1. At what angle(s) should the nozzle point in order that the water land 2.5 m away? -I believe the answer is 18,72 2. Sketch the trajectory for the 18; angle -Please give me exact (x,y coordinates) -I believe...
  7. Math

    Could someone please check my answers to this problem. Thanks! The license fee for a car varies directly with the value of the car. The fee for a car that is valued at $19,500 is $292.50. a)
  8. Math/Calculus

    Find k so that the following function is continuous on any interval: f(x)= kx 0 (less than or equal to) x (less than) 2 3x^2 2 (less than or equal to x) i know the answer is 12 but i don't know how to arrive at that. could you please walk me through the steps? thanks.
  9. Math

    Look at the chart below: Bounce: 0 ~ 1 ~ 2 ~ 3 ~ 4 ---------------------- Height: 100 50 25 13 6 The ordered pairs are {(0,100), (1,50), (2,25), (3,13), (4,6)} * How high do you think the ball will bounce on the 5th bounce? Explain. Please Help!! Thank You!
  10. math again

    How does "How many gallons of a 12% indicator solution must be mixed with a 20% indicator solution to get 10 gal of a 14% solution?" turn into ".12x + .2(10+ -1x) = .14(10)"?? Please, I need to understand how it works! Thank you.
  11. math

    The acceleration of a particle at a time t moving along the x-axis is give by: a(t) = 4e^(2t). At the instant when t=0, the particle is at the point x=2, moving with velocity v(t)=-2. Find the position of the particle at t=1/2 if you could show me how to get that please
  12. Math

    A supporting wire is to be attached to the top of a 32-foot antenna. If the wire must be anchored 32 feet from the base of the antenna, what length of wire is required? Please explain
  13. Math

    Boat travels 10 mi upstream and 10 mi downstream the stream is moving 1mph and the boat took 5 1/3hrs. What is the speed of boat if the stream still? I need help ASAP!!!! PLEASE!!!
  14. Math

    In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.
  15. Math

    In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.
  16. MATH!! probability

    Two cards are drawn without replacement from a deck of 52 cards. Determine P(A and B) where A : the first card is a spade B: the second card is a face card please help!!
  17. math

    please kindly help me to get the answer for this . Elise used 2/9 of piece of string to tie a parcel and another 1/4 of the string to tie a box. What fraction of the string was left?question below.........
  18. 3rd grade math

    Robert is writting a poem. The poem is divided into 5 stanzas and is on 2 pages. There are 60 lines in the poem. How many lines are in each stanza? show work please
  19. 5th grade Math

    Clue 1: i am greater than 100,000, but less than 120,000. Clue 2: I am divisible by 3. Clue 3: The sum of my digits is 6. Please expalin answer. Thank you.
  20. Math 7 - Dividng and Multiplying Integers

    Find the missing integer for each problem. 1. +18 / ____ = -9 2. ___ / -5 = -6 3. -24 / ____ = +2 4. +18 / ____ = -3 / = dividing My Answers: 1. -2 2. +30 3. +12 4. -6 Are my answers are correct???? Please answer! Thank You! :)
  21. Math help please

    A lab assistant wants to make five liters acid solution. If solutions of 40% and 18% are in stock, how many liters of each must be mixedto prepare the solution Amount in liters: 40%: 18%:
  22. math - please help

    The 7 inch diameter drive drum of a belt conveyor is turning at 130 rpm. What is the belt speed (ft/min) if there is no slip between the belt and drum?
  23. Math please!!!

    Place twelve $10 bill on the place value template. Then exchange ten of the bill for one $100 bill and write the result in expanded form?
  24. math

    zac had some 2c stamps and some 5c stamps.He needed to put 30c on a postcard to mail it. What combinations of stamps could he use? would you please explain,thanks
  25. Math

    The Japanese Nozomi averages 162 miles per hour. About how many miles would it take the Nozomi to travel 119 miles? Thanks, (If you could please show me how to do it)
  26. 7th grade math

    consider the inequality 2x+3≤-3. Find the set of all integer solutions of this inequality that are also solutions of the inequality 5x-2<3. Please help I am really confuded
  27. Please Help asap for math

    Given the following: vector u= [-2,-1,2] and vector v=[1,-1,-4] and vector w= [4,3,-2] find: a)theta, the angle between vectors, u and w. b)Are the vectors, u, v, and w coplanar?Show your answer algebraically.
  28. math in distress

    There are 5 kids, the median age is 9. Two of the kids are 5. The range of all the kids are 7. What is the age of the 2nd to the oldest? 1. 5 2. 5 3. 9 4. 5. 12 (7+5) =12 I have went around in circles with this. Please help!!!
  29. Math

    The tornadoes have won 75% of their games. If they their next 4 games, their win percentage goes up to 80%. How many games have they played right now? (Please explain how to solve this problem)
  30. Math and Please Help!

    Jade is painting a rectangular wall. The wall is 4 1/4 yd long and 2 2/3 yd high. The formula for the area of a rectangle is A=bh. What is the area of the wall? I think the answer is 11 and one thirds.
  31. Math

    An ostrich at the zoo weighs 3 times as much as Marks's pet dog. Together, the ostrich and the dogweigh 448 much does the ostrich weigh? Please help.
  32. math

    The books for Mathematics, Geography and Science in a school are in the ratio 5:7:8. There is a proposal to increase these books by 40%, 50% and 75% respectively. What will be the ratio of the increased books? #Please anyone who can help me out with the clearly solution#
  33. Physics-Please check if I did this correctly

    I posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the speed of ride is ...
  34. Math Word Problem

    Please help with this math word problem: Jamal has a 5X7 picture that he took on his summer vaction and he wants to use a photo copier to enlarge it to an 8X10 picture. To enlarge Jamal has to specify a percent between 50% and 200% on the copier. Explain 2 different ways Jamal...
  35. math

    here is my problems url its typed with spaces please rewrite it with out space to see the image. and it wont need password or anything go to (zshare . net )/image/126113093ead8f03 the question is to: *find the area of the shaded region.
  36. math

    A box contains two dimes and four quarters. What is the expected value of a single draw of one coin under the assumption that one cannot distinguish between the coins on the basis of size? can you please explaing for elementery students
  37. math-please help!

    Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?
  38. Math

    Please help me with this problem. In 1626,Peter Minuit of the Dutch West India Company purchased Manhattan Island from Native Americans for $24. Assuming an exponential rate of inflation of 6% per year,how much will Manhattan be worth in 2010?
  39. math

    Debbie traveled by boat 5 miles upstream to fish in her favorite spot. Because of the 6-mph current, it took her 20 minutes longer to get there than to return. How fast will her boat go in still water? (Please round your answer to one decimal place.)
  40. math

    please help, I'm having a hard time set up the problem. Thank you Sally drove a distance of 520 mile. Had she averaged 15mph faster, the trip would of taken 2.4 hours less. find the average speed that she drove.
  41. math (urgent!)

    I was given a graph and told to find an equation for the temperature T in terms of the time t in the form T(t) = a sin(kt-c)+d where a, k, c and d are constants. The max was 32.9 and the min 21.1 I determined that amplitude = 5.9 vertical = 27 period = pi/12 The last thing I ...
  42. Math

    please help!!!!Apply newtons method to approximate the x-values of the indicated points of intersection of the 2 graphs. continue the process until 2 successive approximations differ by less than 0.001. (Hint: Let h(x)=f(x)-g(x)) f(x)=x^6 g(x)=cos(x) 1)x= ??? (smaller value) 2...
  43. Math for Educators

    24five x 3five ------ 132five 27eight 65eight +43eight ------- 157eight 75eight -37eight ------- 36eight 1213five/3five??? -If someone could please confirm my answers for the others as well as help me with the last division problem thank you! these are all equating in ...
  44. Math

    Can you please help with correct format for the following?: re: d = rt equation A boat traveled 40 miles down a river in 2 1/2 hours. The return trip going upstream took twice as long. What is the rate of the boat in still water? Appreciate any help on the set up. Thank you,
  45. algebra

    The price of a sweater is $5 less than twice the price of a shirt. If four sweaters and three shirts cost $200, find the price of each skirt and each sweater. I have no idea how to set up these types of equations..... someone please help its due tomorrow and i cant turn it in ...
  46. Algebra please help..

    1. Find P(10, 2). a. 90 b. 20 c. 200 d. 60 Answer: B 2. Find C(9, 3). a. 84 b. 504 c. 210 d. 360 Answer: A Please Answer!!
  47. urgent!!!words questions

    I have alot of questions here but you don't have to answer them all but please help me!They are due on 24/6/05. The male of mare? The citizens of Paris,Netherlands,New Zealand or Malta? The collection name for cattle,wolves,lions,elephants or whales? What animal make a sound ...

    simplify: [fourth root(a^6)]-[2a(square root(a))] when a is greater than 0 solution: -a times(square root(a)) please explain thanks!
  49. Math

    I need someone to please check my answer for me... add. -1.6 + (-2.3)= the answer I got was -3.9 is this correct? if not could you tell me why and how to get the correct answer..? thank you
  50. math

    The supplement of an angle is 28degrees more than twice the complement of the angle. Find the supplement of the angle. Please help so confound!
  51. 5th math

    can you draw an isosceles triangle that ia not equilateral? draw me sclene triangle ? please !draw me so ,i will get today for my preview .thanks!!!
  52. Math please help

    1. Simplify the expression ((5x^-2)/(4x^2))^-2 2. (x)/(x^2-81)-(9)/(81-x^2) = For the first one the answer was 16x^8/25 but I don't know how to get that. For the second one the answer is 1/x-9 and I also don't know how to get that one.
  53. Math - Logarithm

    Solve the following logarithm equation. Please show all of your work. log (5 + x) – log(x – 2) = log 2
  54. Math, Please Help!!!

    How can the right equation be converted into the answer on the left? (sec^4x)(tan^2x)=(tan^2x + tan^4x)sec^2x
  55. Math (Please help immediately)

    The measure of one angle is three times the measure of its complement. Find the measure of each angle.
  56. math 176

    please detail all the steps for x squared minus 6xy plus 9y squared minus 4z squared
  57. Math

    Teresa had a family photo with the dimensions of 12 inches by 16 1/2 inches. What is the area of the photo in square inches? Please help!!! :(
  58. Help please! Math

    A car is designed to last an average of 12 years with a standard deviation of 0.8 years. What is the probability that a car will last less than 10 years?
  59. math

    If the " famas " of a number is equal to the number of perfect squares less than that number, what is the famas of 36 ? a. 5 b. 6 c. 7 d. 8 e. 9 please answer and explain
  60. math

    the ratio of boys to girls in class is 2:3. If Ms. Wise has 24 students in her class, how many girls are in the class. Please show work
  61. math

    what is the cost of nine ounces of cheese at $.80 per pound?please help 16 ounces = 1 pound 9 ounces = 0.5625 pounds
  62. Math

    What is a simplified form of the expression sec^2x-1/sin x sec x ? a)cot x b)csc x c)tan x d)sec x tan x Please help me :(
  63. Math 9

    My family went to starbucks. We ordered 3 drinks. My daughter's drink was .90 cents less than my drink and my sons drink was $2.20 more than my drink. The total bill was $12.90. How much was each drink? Use algebra. Please help me, thanx

    The ratio of wins to losses for a basketball team is 2:3. Which of the following is a possible total number of games? A. 7 games B. 14 games C. 25 games D. 26 games Can someone show me how to solve this problem please?

    The ratio of wins to losses for a basketball team is 2:3. Which of the following is a possible total number of games? A. 7 games B. 14 games C. 25 games D. 26 games Can someone show me how to solve this problem please?
  66. Match please

    I have a few match problems that I can't figure out. 1.solve: 3x+5=x√7 (that's a radical sign) 2.factor: (2k+3)2-(2x+3)(y-2)-20(y-2)2 (the "2" after (2k+3) ans (y-2) is suppose to be a square sign. thanks if you can help, or even if you can't i ment "Math" lol
  67. math.chem

    Give the answer to the following calculation with the correct number of significant digits. Report your answer in scientific notation. (6.17 x 10-1 + 4.9 x 10-2) x (3.95 x 10-2 + 6.454 x 10-3) i know the answer is 0.0306, but how many sigfigs should the final answer have? ...
  68. math please explian

    I know how to do simple interest on a loan but how would I figure compound interest on a loan $8,000 invested for one year at 6% compounded quarterly ? with rounded to the nearest dollar thanks in advance for explaining :)
  69. Math

    1. Explain the advantages and disadvantages of both the substitution method and the elimination method for solving a system. Help please. The only reasons I can think of is because in substitution it might be more difficult cause there's a possibility of working with fractions.
  70. Math

    Please help! Jack has a mixed fruit pie. There is a variety of fruits (17,3,28,4,89,67,2), how many times will Jack have to stick in his thumb before he is sure to pull out two pieces of the same kind of fruit?
  71. math (please help me)

    A polynomial of degree 4 that increases the y-axis at 6 and whose y-values get more and more negative as x -> +infinity and x -> -infinity -Represent a function that satisfies the given conditions by an equation. Leave in factored form.
  72. 5th grade math

    Please find the least common multiple for each set of numbers: 7,8,10 2,5,6 3,4,7 _______________________________________ Beth has $0.60 more than Suzy. Together they have $8.20. How much money does each girl have? Thank you very much
  73. Math

    The graph of y = f (x) = b^x, where b > 1, is translated such that the equation of the new graph is expressed as y – 2 = f (x – 1). The range of the new function is A. y > 2 B. y > 3 C. y > –1 D. y > –2 2)If log7 m = log 2/3 , then the value of m, ...
  74. math

    I know youall are very busy an that answering posts takes time, but I am in real need of some one to check my questions to see if they are correct, because I need to post my answers very SOON!! PLEASE HELP!!!! THANKS!!
  75. math

    question is 40x^2 + 23x -30 = 0 reads as 40x squared plus 23x minus 30 equals zero...please help, we have not learned the quadric formula yet so we are finding the numbers that make 30 and add to 23.
  76. math (combination)

    A woman has 11 close Friend. Find the number of ways she can invite 5 of them to dinner if a. but where 2 of the friends are married and will not attend separately b. where 2 of the friend will not attend together the answer to a. 210 b. 252 Please explain....
  77. math (word problem)

    Suppose a car tire has a diameter of 26 inches. How many rotations will thee tire make if the car travels 1 mile? Round to the nearest tenth. If you get answer please show work of how to get there. Thanks!
  78. MATH 7th GRADE

    Vicki measured the length of 8 leaves. The lengths were 10 cm, 12 cm, 15 cm, 15 cm, 19 cm, 11 cm, 18 cm, and 15 cm. What is the interquartile range of Vicki's data? answer choices are: a. 1 b. 3 c. 5 d. 6 I chose 5 and it says that 6 is the correct answer. Can you please show ...
  79. Math

    222x9 in distributive property format i got the answer its just i have to figure out how to show how i got. For example i was able to get 56x4+224 by doing (50x4)+(6x4) then 200+24=224.PLEASE HELP
  80. Math please help

    A farmer has 120 feet of fencing available to build a rectangular pen for her pygmy goats. She wants to give them as much room as possible to run. What are the dimensions of the rectangular pen with the largest area?
  81. MATH

    A car dealer will sell you a used car for $5,430 with $430 down and payments of $183.06 per month for 36 months. What is the simple interest rate? (Round each answer to the nearest tenth.) PLEASE HELP!
  82. Math problem

    please help Imagine you have decided to price scones at $2.28 each and the cookies at $1.19 each. How much total revenue would result from selling all the scones and cookies baked in the oven at one time?
  83. Algebra; HELP PLEASE.

    I don't understand the topic we're learning in math. /: Provide an explanation, steps on how you figured the answer out, and of course, the answer. Tell whether the table represents an exponential function. If so, write a rule for the function. x: -2, -1, 0, 1, 2 y: 25, 5, 1, ...
  84. Math

    Thomas is planning on redoing his bathroom floor with tiles measuring 5in by 8in. The floor has an area of 205in square. What is the least number of tiles he will need? I can't not figure this out, can someone please help?
  85. Math help please Ms. Sue agian

    Write an equation with a variable on both sides of the equal sign that has infinitely many solutions. Solve the equation and explain why it has an infinite number of solutions. (3 points) I need help with this one too. Thank you! :)
  86. math

    Solve for x 2^x+1 - 2^x = 112 Put this in exponent form: (3¡îx)(¡îx©ø) Put into equation form: Horizontal stretch of 2, up 3, left 6, reflection on x-axis. Please help me with these three so I can work on the rest using these as examples. Thanks so much for your help!!!!:)
  87. math

    jason and jenny went to see the movie Vampires From Mars. Jason told his mother, " The movie starts at 1:15 p.m. and is 2 hours and 56 minutes long, so it will end at 5:11 p.m. Please pick us up then." What was jasons mistake and how can it be fixed.
  88. Math

    Having a problem writing an expanded number in notation in descending order. Ex. 92,563,174. I know the placements and the number but have a problem when it comes to write it. Can you please help. I would appreciate an example so much.
  89. 6th grade math

    Can you check these, please? Convert each of the following verbal phrases to algebraic expressions. 1.twice the number plus 16 is 18 Ans: 2x + 16 = 18 2.the quotient of a number and ten more than fourteen is eleven Ans: (10 + 14)/x = 11? or x/10 + 14 = 11?
  90. math

    You finally get an allowance . You put $2 away in January, 4$ away in February, $8 away in March, $16 away in April and followed this saving pattern through to December. How much money do you have in 12 months? Please explain
  91. math

    You finally get an allowance . You put $2 away in January, 4$ away in February, $8 away in March, $16 away in April and followed this saving pattern through to December. How much money do you have in 12 months? Please explain
  92. math(HELP)

    PLEASE ANSWER THESE BEFORE I LOSE MY MIND !!! 19. What is the amount of sales tax owed on a $350 laptop computer if the tax rate is 6%? A.$2.10 B.$21.00 C.$35.00 D.$46.00 20. Find the amount of the discount on a $120 bicycle that is on sale for 25% off. A.$25.00 B.$30.00 C.$73...
  93. math

    The number of washers 3/32 inch thick that can be cut from a piece of stock 25 1/2 inches long, allowing 1/16 inch for waste for each cut is a. 160 b. 163 c. 260 d. 272 e. 408 please answer and explain
  94. Math

    If a navigation error puts a plane 2 degrees off course, how far off course is the plane after flying 121 miles? Round to the nearest tenth of a mile. Just explain how to solve, please.
  95. Math IV

    what is the margin of error for a simple random sample of 900 people with a standard deviation of 13.5 at 95% level of confidence How do you write this question in the right formula, please? I believe I can calculate the problem, I don't know how to write it. 900 2.5 and 1.96
  96. Math

    1. Given the function rule f(x)= x^2 - 3x + 2, what is the output of f(-2)? A. 12 B. 4 C. -8 D. 0 2. Suppose you earn $10 each hour you babysit. Which function describes the relationship between your total earnings E and the number of hours you babysit, h? A. E(h) = 10h B. E(h...
  97. Math

    the cost of a student ticket to the schools play is $7. write an equation that correctly relates the cost,c,for particular number of student tickets,s,purchased indetify the independent and dependent variables (3 Points) Please help
  98. Math

    A prototype rocket burns 159 gallons of liquid hydrogen fuel each second during a regular launch. Make a table that shows how many gallons of fuel are burned after 2,3,5,and 10 seconds. Please help me
  99. Math Help!!!

    How many ways are there to choose a potato and two green vegetables from a choice of three potatoes and seven green vegetables? A. 126 B. 63 C. 21 D. 252 i chose A. But im 50% not sure Please help test tomorrow something similar
  100. math

    Susan has 8/9 gallons of water. She drinks 2/5 of it. Select all the statements that help you determine what fraction of a gallon she has left. Divide 8/9 by 2/5. No Divide 2/5 by 8/9. Yes Multiply the fractions together. No Multiply 8 x 2 and 9 x 5. No Can someone check my ...
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