math

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

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

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?

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

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

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

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

8. mathematics

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

9. math

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

10. math

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

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

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

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

14. pre calculus

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

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

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

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+=

18. math

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

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

20. CALCULUS

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!

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)=

22. math

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

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?

24. Math

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

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)

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

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

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?

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

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

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?

32. Math

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

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.

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?

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

36. math

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

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

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

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?

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?

41. math

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

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?

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?

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

45. math

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

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?

47. math

Expand cos(50°) using a double angle identity

48. math

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

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

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?

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

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

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?

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

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,

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.

57. math

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

58. math

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

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)

60. math

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

61. Math

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

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

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

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?

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.

66. Math

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

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

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.

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

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

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

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. .?.

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?

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?

75. CALCULUS

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

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

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

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

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?

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

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?

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.

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%.

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.

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?

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.

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

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

89. Jane

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

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?

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! :)

92. math

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

93. Math

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

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)

95. Calculus and Vectors

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

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?

97. math

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

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

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