# Math

Newest questions and responses by Math
1. ## math

what is 57% of 11?

2. ## Math

If the average of a, b, and 7 is 13; what is the average of a + 3, b - 5, and 6?

3. ## Geometry

In a triangle, segments AB and AC are trisected, and D is the midpoint of BC. If the area of Triangle ABC is 630 cm^2, then the area of the section marked x, in cm^2, is?

Q P

5. ## math

Find the equation of the line in slope-intercept form. b=4 and m=−5

6. ## math

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

7. ## math

There are 120 student in class in which 20 of them are girls and rest boys.if the average marks in math of boys is 65% and that of girls is 80%. find the average marks of the class

8. ## 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

9. ## 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

10. ## 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

11. ## Anonymous

The following table compares the speed you drive in km/h to the fuel economy in km/L. Find the speed you need to travel to max your fuel economy. Speed 24 32 40 48 56 64 72 80 89 97 105 113 Fuel Economy 9.48 10.84 11.69 12.33 12.24 12.75 12.71 12.84 12.92

12. ## 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

13. ## Math

The following table compares the speed you drive in km/h to the fuel economy in km/L. Find the speed you need to travel to max your fuel economy. Speed 24 32 40 48 56 64 72 80 89 97 105 113 Fuel Economy 9.48 10.84 11.69 12.33 12.24 12.75 12.71 12.84 12.92

14. ## math

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

15. ## Math

Amanda cuts of 45-cm ribbon into two pieces in the ratio of 4:5 find the length of the shorter piece.

16. ## Math

Find the function rule (-2,9) (-1,4) (0,-1) (1,-6) (2,-11) I think the function rule is you subtract 5 from the y as you go on.

17. ## Economics

Can anyone walk me through the solution of this problem? 1/2(1600/E)^1/2*50=? Thank You

18. ## geometry

im not that good at geometry i need some one to check this for me XY bisects AB at point g which of the following is true about point g a. g is the mid point of AB b. g is the mid point of XY c. g is the mid point of AB and XY d. none of these*

19. ## Math

On Friday Naomi walked 3/4 of a mile. On Saturday she walked 1 2/3 of a mile On Sunday she walked 2 3/5 of a mile. How many miles did she walk in total?

20. ## science

What are the differences between aa lava and pahoehoe lava? What are the similarities between these two types of lava?

21. ## math

mikes truck engine holds 1 1/4 gallons of oil if there are 3 quarts of oil in the engine now how many more quarts of oil does mike need to add to fill the engine capacity? -(hint i gallon is 4 quarts)

22. ## math

it took 12 gallons of gas to fill the family car this is 5/6 the amount that the tank can hold how much gas can the tank hold? A.10 Gallons B.14 2/5 Gallons C.12 5/6 Gallons D.13 5/6 Gallons-My Answer Please check thanks:)

24. ## Math

Kevin moved from a city to a small town. The population of the city was 6 x 10^5, which is about 15 times a great as the small town. Write an expression in scientific notation that represents the population of the small town. I got 4 x 10^4? Please explain

25. ## 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?

26. ## 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

27. ## math

3(y + 1) for y = 2 A 6 B 9*** C 7 D 8 If anybody has taken this test, it would be great if you could help me on some other answers in this test.

28. ## math

Solve each linear system. Verify each solution by substituting the coordinates of your solutino into both equations. a) y = -x and y = x - 6 b) x - y = 8 and x + 2y = 2

A forest owned by the Jumbo Lumber Corporation contains 7,820 trees. If Jumbo Lumber cuts down 77 trees every day, which function can be used to find the number of trees, n, left in the forest after t days? A. n(t) = 7,820 - 77t B. n(t) = 7,820t - 77(my

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,

31. ## math

the circumference of s sphere is measured to be 10 cm with an error of 0.4cm.the this radius is used to calculate the area and volume.find the errors in the calculated radius,area and volume

32. ## 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.

33. ## math

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

34. ## math

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

5/8 + 7/12

36. ## math

Write y to the power of -4 as a power with only positive exponents. Thanks need help on this question

37. ## math

Differentiate s=(2-t)^2 with respect to t

38. ## Math

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

39. ## Math

A car dealer purchases 40 new cars at 6,500 each. He sold 40% of them at 8,000 each and the rest of them at 9,000 each. What is his total profit?

40. ## math

solve y=0.04x^2+8.3x+4.3

41. ## math

1.one more than 3 tens 2.one less than four times five 3.five added to six 4.successor of 28 5.two more than two times tens 6.the greatest 1 digit composite number 7.three added to three times three

42. ## 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)

43. ## Math

Did John Cena ever do math? It doesn't look like he did..

44. ## math

Can someone please tell me what is the percentage of 19.24 from 14.00? I would like someone to give the formula of solving this. Thank You!

45. ## algebra

Suppose x can be expressed as a function of y by x = 5y − 3. a. How can y be expressed as a function of x? b. What is the relationship between the slopes of the two linear equations? c. How do the x-intercepts and y-intercepts of the two equations

46. ## math

round to the nearest hundredths 1.5.

47. ## Math

Two business partners, Ellen and Bob, invested money in their business at a ratio of 6 to 7. Bob invested the greater amount. The total amount invested was \$260. How much did each partner invest?

48. ## math

what can * by -168 and adds to get 21.

49. ## Math

Is x+3=2y and x=2y-3 have infinitely solutions or one solution or no solution

50. ## Math

I am confused on this. Can anyone show me where to start on how to solve it? Given the cipher and function below, decode the following message: 14-2-21-9 10-20 7-22-15 Function: f(x)=2x-2 Cipher A=2, b=4, c=6, d=8, e=10, f=12, g=14, h=16, i=18 j=20, k=22,

51. ## Math

Construct a right triangle having hypotenuse of length 5.6 and one of whose acute angle measure 30

52. ## 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

53. ## 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

54. ## Pam

How to find the vertex ? f(x)= x^2-3

55. ## Pam

What is the horizontal asymptote? y=x^2+11x+16/x+8

56. ## 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)

57. ## Math

A meteorologist predicted that the downtown area would get 16 inches of snow in a snowstorm. The downtown area ended up getting 13 inches of snow. What was the percent error of the prediction?

58. ## Algebra

Use the figure to answer questions 1-3 file:///C:/Users/Student/Downloads/642756-212012-25329-PM-1227809791%20(1).png 1. Name a pair of complementary angles. ∠1 and ∠4 ∠1 and ∠6 ∠3 and ∠4 ∠4 and ∠5 2. If m ∠1 = 53°, what is m ∠4? 53°

59. ## math

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

60. ## Math

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

61. ## 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

62. ## Emma

Solve (√6+i)(√6-1)

63. ## pre calc

You have a sample of a certain radioactive substance. After two days, thirty percent of the sample has decayed. What is the half-life of the material and how much will have decayed after a week?

64. ## physics

An ideal gas has the following initial conditions: Vi = 490 cm3, Pi = 5 atm, and Ti = 100°C. What is its final temperature if the pressure is reduced to 1 atm and the volume expands to 1000 cm3?

66. ## Plane Trigonometry

tan A=-4/5;A in Quadrant 2 and cos B=-5/13: B in Quadrant 3. What is the exact value of the expression cos(A+B)?

67. ## 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

68. ## math

Find the value of K so that x^2-5x+k=0 has one root equal to 4.

69. ## Math

A glass containing 250 mL of 80% iodine solution tips over spelling part of its contents. This subsequently replaced by an amount from a mixture of 40% iodine. If a 72% solution is resulted, how much was spilled?

70. ## Math

How many kg of pure salt must be added to 8 kg of a 30% solution to obtain a 35% soltution?

71. ## Aria

If a projectile is shot vertically upward from the ground with an initial velocity of 100 ft per sec, neglecting air resistance, its height s (in feet) above the ground t seconds after projection is given by s= -16t^2 + 100t a) After how many seconds will

72. ## pre-calc

|2x+1| greater than or equal to |x-3|

73. ## Pre-calc

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?

74. ## pre-calc

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?

75. ## pre-calc

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?

76. ## pre-calc

We use the same polynomials as in the first question. Suppose that 3x^3 + 2x + 1 = (ax^2 + bx + c)(x+2) + d. Then b is equal to:

77. ## 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

78. ## pre-calc

The force, F, between two bodies of mass m1 kilograms and m2 kilograms whose centers of mass are a distance of r meters apart is given by the formula F = (Gm1m2)/ r2 where G is the gravitational constant of the universe. What are the units of the

79. ## pre-calc

The radius of the earth is approximately 4,000 miles. The acceleration due to gravity is approximately 32 feet per square second. The mass of the earth is approximately 6 × 10^24 kilograms. Calculate the value of G in units of kilograms, meters, and

80. ## Math

In a particular​ year, a total of 63,172 students studied in two of the most popular host countries when traveling abroad. If 7306 more students studied in the most popular host country than in the second most popular host​ country, find how many

81. ## Pre-calc

Problem 1. Suppose x > 0. Simplify the expression [(x+h)^1/2− (x) ^1/2]/h . For what values of h is this expression defined?

82. ## Math

Alice paints at a rate of 10 square feet per minute and Bob paints at a rate of 8 square feet per minute. If they work together, how many square feet can they paint per minute?

83. ## 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?

84. ## 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

85. ## geometry

The area of a triangle with sides 10,10,12 is __ sq. units.

86. ## lin

the product of the factors of 6

87. ## lola

how much bigger than -9 is -1

88. ## Math

If there are 5 boys and 7girls, in how many ways can 5 boys and 5girls sit in a round table? Is the ans : 5!*4!*7c5? Reason: since there are 5 boys so (5-1)! And left 5 seats for girls so 7c5 and within the girls theres 5 diffrent ones so another 5!

89. ## maths

Different ways of arranging 72 books in equal piles

90. ## lauren

​\$6300 is​ invested, part of it at 11​% and part of it at 77​%. For a certain​ year, the total yield is ​\$565.00. How much was invested at each​ rate? how much was invested at 11% and 7%? thank you

91. ## Ap series

Sum of first six term of an ap is 46 ratio of its 10th term to that of 30th term is 1:3. Find its 13th term

92. ## mathematics

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

93. ## math

6 red balls and 5white total 20balls how many yellow balls find probility

94. ## 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.

95. ## Math

Make a table and graph each quadratic function. Use integers from -3 to 3 for inputs. #4- y= -x2 #5- y=2x squared #6- y= -8x squared #7- y= x squared + 2 Make a table and a graph for each function. Use only positive values for x. #10- y= 10/x #11- y= 8/x

96. ## Math

In a piggy bank Jane has 8 more quarters than dimes and she has 5 less nickels than dimes. Write an algebraic expression

97. ## Math

In a piggy bank Jane has 8 more quarters than dimes and she has 5 less nickels than dimes. Write an algebraic expression

98. ## Semia

A circular sinkhole has a circumference of 75.36 meters. A week later, it has a circumference of 150.42 meters. a. Estimate the diameter of the sinkhole each week. The sinkhole is about ? meters the first week. The sinkhole is about ? meters the second

An art teacher had a total of t markers. He gave an equal number of markers to each of 18 students and had 16 markers left over. Which equation could be used to find n , the number of markers each student received? A t = 18n B t = 34n C t = 18n + 16 D t =