Popular questions and responses by math
  1. math

    A circular track is 1000 yards in circumference. Cyclists A, B, and C start at the same place and time, and race around the track at the following rates per minute: A at 700 yards, B at 800 yards, and C at 900 yards. What is the least number of minutes it

    asked on August 20, 2014
  2. math

    1. A gallon of a certain kind of paint will cover 224 square feet of surface. In painting two walls; one 36’ by 8’ and the other 24’ by 9’, the number of gallons of paint used is: 2. Susan wants to use blue, yellow, green, and pink paint to

    asked on August 20, 2014
  3. jayne

    Five socks, colored blue, brown, black, red, and purple are in a drawer. how many combinations of three socks can be randomly selected from the drawer?

    asked on February 9, 2011
  4. Math

    A user is charged php300 monthly for a particular mobile plan, which includes 100 free text messages. Messages in excess of 100 are charged php1 each. Represent the amount as a function of the number of messages m sent in a month.expressed by the piecewise

    asked on June 10, 2018
  5. Math

    Assume a box contains three red jelly beans and two green ones. We consider the event that a red bean is drawn. Suppose I pick a jelly bean from the box without looking. I record the color but do not put the bean back in the box. Then I choose a bean

    asked on June 28, 2015
  6. Math

    These two scalene triangles are similar with a scale of 5:2. What is true about these figures? A. a/e = 1 B AB/DE = 2/5 C AC/DF = 5/2 D c/f = 5/2

    asked on February 14, 2020
  7. Calculus

    A rectangular garden of area 75 sq ft is to be surrounded on 3 sides by a brick wall costing $12 per foot and on one side by a fence costing $7 per foot. Find the dimensions of the garden that the cost of the materials is minimized Read more: A rectangular

    asked on February 21, 2012
  8. mathematics

    a1=1 ,an=3an-1+2 for n>2

    asked on July 17, 2016
  9. math

    Find all solutions of the equation sec^2x-2=0. The answer is A+Bkπ where is any integer and 0

    asked on July 24, 2019
  10. math

    can someone help me with Lesson 9: Integers and Algebraic Expressions Unit Test for connection academy help plz

    asked on September 20, 2018
  11. Calculus

    Foggy optics, inc. makes laboratory microscopes. setting up each production run costs $2500. Insurance costs, based on the average number of microscopes in the warehouse, amount to $20 per microscope per year. storage costs, based on the maximum number of

    asked on February 23, 2012
  12. Compound Interest : Future Value and Present Value

    Payments of $1800 and $2400 weere made on a $10,000 variable-rate loan 18 and 30 months after the date of the loan. The interest rate was 11.5% compounded semi-annually for the first two years and 10.74% compounded monthly thereafter. What amount was owed

    asked on July 24, 2009
  13. math

    Which answer best completes the following sentence? Two advantages of a confederation are that it ______ and ______. A: prevents abuse of power by a national government; preserves local identity B: concentrates power in state governments; makes national

    asked on June 4, 2018
  14. pre calculus

    Use a calculator to find the approximate value of sin-1( 0.635).

    asked on September 20, 2014
  15. math

    In the addition problem at the bottom, the sum of the two digits represented by B and C is ?. Each time the same letter appears it represents the same digit) 2BA +C6D____ 8AD

    asked on December 5, 2013
  16. math

    a carton has a length of 2 and 1/6 feet, width of 1 and 1/5, and hight of 2 and 1/2 feet. what is the volume of the carton

    asked on August 16, 2019
  17. math

    Find the EXACT value of sin(2A) if cscA=5/4 Assume A is a Quadrant I angle in standard position. sin(2A+=

    asked on July 30, 2019
  18. math

    some money is shared between Ali,Ben & Carl in the ratio 5:3:2.Ben receives $60.How much money is shared?

    asked on April 10, 2019
  19. math

    Both antibiotics were prescribed in high dosage slow release capsules. The function C(x)= 5log(x+1) + 10 models the concentration of levofloxacin in mol/L over a time x, in hours. The function D(x) = 10log(x+1) + 5 models the concentration of metronidazole

    asked on July 8, 2018

    Starting with the graph of f(x)=5x, write the equation of the graph that results from reflecting f(x) about the line y =4. y=_______? Thank you!

    asked on January 31, 2014
  21. math

    Find the EXACT value of sin(2A) if cscA=5/4 Assume A is a Quadrant I angle in standard position. sin(2A)=

    asked on July 30, 2019
  22. math

    Find the EXACT value of cos(2A) if angle A is arctan(12/5). cos(2A)=

    asked on July 30, 2019
  23. math

    if a and b are the roots of the equation x^2-3x+1=0, what is the value of (1/a) + (1/b)? If the function f is defined by f(x) = (x-1)^2 -3, where -1 is less than or equal to x and 3 is greater than or equal to x. Which of the following is the range of f?

    asked on July 22, 2019
  24. Math

    I am a 5 digit number. All my digits are the same and the sum of digits is 40 .

    asked on September 3, 2017
  25. Math

    1. Use 3.14 for pie to estimate the area of a circle. The diameter is given. Round your answer to the nearest hundredth if necessary. (the diameter is 16.8) 2. Find the missing length. Round to the nearest tenth, if necessary. (7,19)

    asked on May 8, 2017
  26. Math

    write a function rule for the area of a rectangle or picture frame that has a width of 22 in less than its length use the function rule to find the area of the picture frame the length is 39 inches

    asked on March 7, 2017
  27. Algebra 1

    Suppose y varies directly with x, and y=25 when x=-140. What is the value of y when x=36 A)140 B)165 C)201.6***** D)176

    asked on December 6, 2016
  28. Algebra 1

    There are 8 boys on a bus. Each boy has 8 backpacks. In each backpack, there are 8 big dogs. For every big dog there are 8 little dogs. How many legs are there in the bus?

    asked on February 19, 2016
  29. Math

    Signals The king has 10 (different) colored flags that he uses to send coded messages to his general in the field. For example, red-blue-green might mean “attack at dawn” and blue-green-red may mean “retreat.” He sends the message by arranging

    asked on June 28, 2015
  30. math

    the average attendance of a class from monday to wednesday was 39 and that from wednesday to saturday was 39.5. What was the attendance on wednesday, if the average attendance from monday to saturday was 40 I did this:- m+t+w/3=39 w+Th+F+S/4=39.5

    asked on September 7, 2014
  31. geometry

    chung ho is standing on the top of a building that is 135m tall. The angle of depression to the top of the building next door is 71 degrees. The angle to the base of the building is 77 degrees. The buildings are 31m apart. How tall is the other building?

    asked on March 1, 2012
  32. Math

    f(x) = 6x^2 + 7x − 20 Find the maximum or minimum value of f(x). (Round your answer to two decimal places.)

    asked on September 28, 2019
  33. Math

    complex number L = 2 + bj Arg (L) = 5π/6 find all values of b? got 1/sqrt(3) but need it to be positive.

    asked on September 6, 2019
  34. Math

    A park is 300 yds by 500 yds. There is a 4 wide foot walking path going around the entire perimeter of the park. The rest of the park is green space. How much green space is there in the park?

    asked on March 27, 2019
  35. Algebra

    A flower garden has 3 times as many red roses than pink roses. Twice the number of red roses is the same as four times the number of pink roses increased by 10, how many red roses are there/ I know that X = red roses and Y = pink rose 1. x=3y and 2x=4y+10

    asked on February 25, 2019
  36. math

    Pat has 4 1/2 feet of fabric each piece is 9 inches how man pieces can pat cut

    asked on April 4, 2018
  37. MATH

    The grocery store parking lot is shaped like a parallelogram. Mr.Campbell is paving the parking lot.The area of the parking lot is 6x^2-3x-3m^2. what are the measures of the height and base of the parking lot. i did 3(2x^2-x-m^2) as my first step but now i

    asked on March 10, 2017
  38. jay

    For a trapezoid, the following formula relates the area A, the two bases a and b, and the height h. A=(a+b)2hA=(a+b)2h Solve for a. a=2Ah+ba=2Ah+b a=2A−bha=2A−bh a=2Ah−ba=2Ah−b a=Ah2−b

    asked on September 21, 2016
  39. math

    the average weight of men in a meeting room is 170 pounds, and average weight of women is 130 pounds. if more than 60% of the people in the room are men, which of the following could be the average weight of all the people in the room?

    asked on September 16, 2013
  40. math

    you a framing a picture that is 5 in by 7in. with a 1 inch wide frame. find the perimeter of the outside edge of the frame. explain, pleaswe i know the anser is 32 but why?

    asked on September 6, 2011
  41. math

    The sum of 4 consecutive odd integers is -104. Find the integers with x for unknown numbers.

    asked on January 31, 2011
  42. liz

    You build a box that is 4 feet long, 5 feet wide, and 8 feet high. The distance from the top left front corner to the top right back corner is ______. I tried a²= 4² + 5² a²= 41 d² = 41 + 8² d²= 105 d=+- 10.25 is this right?

    asked on October 8, 2010
  43. kayla

    A sugar molecule has twice as many atoms of hydrogen as it does oxygen and one more atom of carbon that oxygen. If a sugar molecule has a total of 45 atoms, how many are oxygen and how many are hydrogen?

    asked on September 2, 2008
  44. math

    What is the first step in solving the linear system {2x − 3y = 11 {−x + 5y = −9 by the substitution method in the most efficient way? A. Solve the first equation for x. B. Solve the first equation for y. C. Solve the second equation for x. D. Solve

    asked on March 31, 2020
  45. math

    Given the parent function, y=2^x, write an equation for a function that has a vertical shift down 5 units.

    asked on March 16, 2020
  46. Math

    Ram bought some bags of cement each 49.7kg. lf the total weight of all the bags is 1143.1kg. how many bag did he buy?

    asked on November 5, 2019
  47. math

    Expand cos(50°) using a double angle identity

    asked on July 30, 2019
  48. math

    find the exact value of the expression: 6tan^2(π/4)+18sec^2(π/4).

    asked on July 24, 2019
  49. Math

    It costs $5 for 1 snow cone. Which function rule correctly relates the number of snow cones purchased, s to the total cost c. A. c=s+5 B. c=5s C. c=s÷5

    asked on May 16, 2019
  50. Math

    If the question were to ask me given me a quadratic equation, and I need to figure out what the horizontal distance of it is, do I simply plug it into thequadratic equation?

    asked on May 13, 2019
  51. math

    line y=3x-1 is transformed by a dilation with a scale factor of 2 and centered at (3,8). The line's image is Line MN is dilated by a scale factor of 2 centered at the point (0,6). If MN is represented by y=-3x+6, The line's image is

    asked on January 9, 2019
  52. Math

    The average depth of the water at the end of the dock is 6 feet. High tide occurs at 6 am and low tide occurs at 6 pm. The depth of the water at high tide is 9 feet. The information can be graphed using a sinusoidal function. Your boat needs at least 4.5

    asked on May 1, 2018
  53. math help g

    Chris has a square garden with an area of 38.4m^2. He decreases the length of each side by 1.7m to make a smaller garden. What is the closet to the perimeter of the smaller garden?

    asked on December 9, 2017
  54. Math

    A school wants to build a fence to enclose a rectangular 4-sided playground of 144m^2. What is the min cost for a fence if it costs $5.70 per meter of fencing? 2. The principal checks the budget an sees that only $228 is available for the purchase of

    asked on December 6, 2017

    Bruce bought four packages of cornbread mix that each weighs x pounds. He also bought a package of biscuit mix that weighs pounds more than one package of cornbread mix. If the total weight of the items that Bruce bought is 31 pounds, what is the weight,

    asked on November 8, 2017
  56. Math

    The cost of 1lb of strawberries is a dollar more than the cost of 1lb of grapes. If ms. A bought 2lbs of strawberries and 5lbs of grapes for $12.50. What is the cost of the fruits.

    asked on October 10, 2017
  57. math

    32-q+0.25q=15.50 Can someone explain how to solve this?

    asked on October 10, 2017
  58. math

    Debra has $67 loonies and toonies. If there are 45 coins in total, how many loonies are there

    asked on October 10, 2017
  59. Math

    The volume of seed in a bird feeder is represented by the equation V = 12(24-h) Q: Make a table of ordered pairs (h,V)

    asked on February 8, 2017
  60. math

    One half a number minus 6 is 4 . What is the number?

    asked on February 1, 2017
  61. Math

    A class has 30 boys and 25 girls. what is the percentage of boys in the class?

    asked on December 27, 2016
  62. physics

    Given that the carbon atom has a mass of 12 amu, how many carbon atoms are there in a diamond with a mass of 8 g? ....atoms

    asked on November 2, 2016
  63. Pre-Calc

    A force, F, on a body of mass m causes the body to accelerate. Denote the acceleration of the body by a. The relationship between force, mass, and acceleration is F = ma. If we take the unit of mass to be a kilogram, the unit of distance to be a meter, and

    asked on September 30, 2016
  64. jay

    The formula for the perimeter of a rectangle is P=2(l+w)P=2(l+w). Solve for w. w=2P−lw=2P−l w=p2−lw=p2−l w=p−l2w=p−l2 w=P2+l D?

    asked on September 21, 2016
  65. Maths Year 10

    Q) the difference between two numbers is 5. A) if the larger number is k, what is the other number? B) write a simplified expression for the product of both numbers. ??? ty in adv.

    asked on June 25, 2016
  66. Math

    How do you do 4ln(2x+3)=11

    asked on January 27, 2016
  67. Algebra

    If the angles of triangle are in the ratio of4:1:1then find the ratio in the smallest side / perimeter of the tringle

    asked on October 4, 2015
  68. Math

    On Halloween, a man presents a child with a bowl containing six different pieces of candy and six different pieces of gum. He tells her that she may have four of each. How many choices does she have? Answer as a whole number.

    asked on June 28, 2015
  69. math

    Two station astronauts will each perform three 8-hour EVAs within 13 days to repair a damaged solar panel that was impacted by a micrometeoroid on the space station. What is the total amount of oxygen needed by the two astronauts to accomplish this? Please

    asked on January 29, 2015
  70. Haley

    Three circles with radii 35cm, 50cm, and 65cm respectively are tangent to each other externally. Find the angles of the triangle formed by joining the centers of the circles. My teacher said to use the cosine law cause you know 3 sides but no angles. But I

    asked on August 27, 2014
  71. Liz

    A rectangular lawn measuring 8m by 4m is surrounded by a flower bed of uniform width. The combined area of the lawn and the flower bed is 165cm^2. What is the width of the flower bed

    asked on August 27, 2014
  72. Haley

    How to get from general form to intercept form in quadratic equations. I'm not sure if it's possible. Or how do you get from vertex form to intercept form. .?.

    asked on August 27, 2014
  73. Sam

    only 2/9 the university students wanted to become math teachers. if 2800 didn't want to become math teachers how many university students were there? So, 2/9 * WN = 2800? How would you work it out?

    asked on May 6, 2014
  74. Trig

    the sine of an angle is 0.6. the constraint is the angle lies in quadrant II. how do I figure out what x is to solve the six functions?

    asked on February 1, 2014

    Find a formula for the inverse of the function. y=x^2-x, x>=(greater than or equal to) 1/2 Please give me a step by step explanation. I think my algebra is wrong... Ty

    asked on February 1, 2014
  76. math

    The graph below shows the rate of natural gas usage (in therms per day) in one household for a 30 - day period. Estimate the total number of therms used during this period. Use left endpoints and rectangles with widths of 3 days. View graph at: postimg.o r

    asked on November 22, 2013
  77. Math

    Julie is digging a square area in her backyard for a vegetable garden. If the area is 52 square feet, what is the approximate length of one side of her garden? 6 square feet 7 square feet 8 square feet 9 square feet 7 square feet is my answer, what's

    asked on October 22, 2012
  78. Ana

    A group of hikers on a mountain began at an elevation of 3040 feet above sea level and stopped at elevation of 2319 feet above sea level. What was their change in elevation between these points? How can you tell from the change in elevation whether the

    asked on September 9, 2012
  79. Geometry

    Triangle ΔABC has vertices A(2,5), B(8,1) and C(-2,-1) and is a right triangle. If the slope of AB is -2/3 and the slope of AC is 3/2, are the lines parallel, perpendicular or neither?

    asked on July 14, 2012
  80. math

    Tristan is having a birthday party. He doesn’t want anyone less than 10 years old to come to his party. If y equals age in years, which number sentence expresses his age requirements? A. y < 10 B. 10 = y C. y 10 D. 9 > y

    asked on March 29, 2012
  81. math modeling

    Suppose that you invested $1,442 at the annual rate of 4.60% compounded continuously, and your friend invested $885 at the annual rate of 6.35% compounded quarterly. In how quarters will your friends investment exceeds yours?

    asked on October 25, 2011
  82. math modeling

    At 3a.m., there is a colony of 736 bacteria, and it is growing at a continuous hourly rate of 10.77%. How many bacteria are there at 7p.m.? Round your answer to the nearest whole number of bacteria.

    asked on October 25, 2011
  83. math modeling

    Determine the annual interest rate r required for an investment with continuous compound interest to yield an effective rate of 9.94%.

    asked on October 25, 2011
  84. math modeling

    If you invested 5,250 dollars at an annual rate of 6.64% compounded monthly, determine the value of your investment after 11 years and 3 months. Your answer should be accurate to the nearest cent.

    asked on October 25, 2011
  85. math

    The sales (in millions of dollars) of a laser disc recording of a hit movie t years from the date of release is given by S(t)=[{4t+1}/{t^3+1}] How fast is the sales changing one year the laser discs are released?

    asked on May 25, 2011
  86. math

    an airplane is flying at 550 km/h on a heading of 080. the wind is blowing at 60 km/h from a bearing of 120. Find the ground velocity of the airplane. Please Help! Thanks in advance.

    asked on May 24, 2011
  87. Ann

    Need to write fraction as a whole or mixed number. Express fractions in simplest form.. 1. 76/12 Answer= 6 1/6 2. 88/10 Answer= 8 2/5

    asked on May 9, 2011
  88. college

    I have 7 12 feet of rope and my friend has 3/10 of what we . need to make a jump rope hang up in our back yourd

    asked on November 4, 2010
  89. Jane

    I am confused what would be a real-life solution using polynomial division.

    asked on January 21, 2010
  90. percentage

    a student has an avg of 57%. he has 2 test left which was are both worth 5% and 1 assigment worth 1 %. he also has 1 one big asigment worth 5%. how much would he need minimun in all these to get a 80% avg by the end of it?

    asked on April 21, 2009
  91. Sally

    I have a factoring question; what is 8a^2-8a-30? I've been working on this for a while and I think I understand factoring, but I'm not getting the right answer, which is supposed to be 2(2a-5)(2a+3). Any help would be so appreciated! :)

    asked on September 23, 2008
  92. math

    Convert: 2.7x10^-3 kg/cm^3 to kg/m^3 0.81 g/cm^3 to kg/m^3

    asked on August 26, 2008
  93. Math

    Solve the equation 1. 2x-3=15 6 9 24 36(My choice may be wrong) I need HELP!!!

    asked on May 8, 2020
  94. math

    example sorry for caps You are designing a rectangular playground. ON YOUR SCALE DRAWING, THE VERTICES OF THE RECTANGLE ARE (6,3), (6,5), AND (8,3). wHAT ARE THE COORDINATES OF THE FOURTH VERTEX? 1: (4,5) 2: (8,5) 3: (8,1) 4: (5,8)

    asked on April 16, 2020
  95. Calculus and Vectors

    Let a=(5,2) and b=(-3,1), find a (dot) b

    asked on April 14, 2020
  96. math

    A seed company planted a floral mosaic of a national flag. The perimeter of the flag is 500 feet. Determine the​ flag's length and width if the length is 130 feet greater than the width. What is the​ flag's width?

    asked on February 1, 2020
  97. math

    How long will it take to double your money if you earn 5%, compounded continuously?

    asked on November 10, 2019
  98. algebra

    Find the standard equation of a parabola that has a vertical axis and satisfies the given conditions. x-intercepts −1 and 7 highest point has y-coordinate 4

    asked on September 28, 2019
  99. math

    A college student receives an interest-free loan of $10,200 from a relative. The student will repay $200 per month until the loan is paid off. a) Express the amount P (in dollars) remaining to be paid in terms of time t (in months). (Give your answer in

    asked on September 28, 2019
  100. algebra

    In a certain medical test designed to measure carbohydrate tolerance, an adult drinks 9 ounces of a 20% glucose solution. When the test is administered to a child, the glucose concentration must be decreased to 10%. How much 20% glucose solution and how

    asked on September 18, 2019


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