# Posts by math

Total # Posts: 482

1. ### 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 function.
2. ### Math

These are questions from a test. Please do not respond.
3. ### 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 government too weak to ...

5. ### Anonymous

how do you find the regression?
6. ### 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 12.24 11.65 10.76
7. ### Math

Wow thank you so much :)
8. ### 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 feet of water to come ...
9. ### 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 12.24 11.65 10.76
10. ### math

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

Amanda cuts of 45-cm ribbon into two pieces in the ratio of 4:5 find the length of the shorter piece.
12. ### 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.
13. ### Economics

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

is what i picked

(d)
16. ### 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*
17. ### 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?
18. ### science

What are the differences between aa lava and pahoehoe lava? What are the similarities between these two types of lava?
19. ### 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)
20. ### 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:)
21. ### math

thanks everyone

23. ### 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 if I got it wrong
24. ### 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?
25. ### 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 fencing. What s the ...
26. ### 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.
27. ### 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 answer) C. n(t) = (7,...

Also between weighs and pounds its 7/2

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, in pounds, of each ...
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

One of the two results is a smaller cone.. would your theory still work?
33. ### 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.
34. ### math

Right I forgot that it still means one.
35. ### math

Yeah But I dont under stand how q + -.25q is equalled to -0.75q
36. ### math

32-q+0.25q=15.50 Can someone explain how to solve this?
37. ### math

I still dont understand.
38. ### math

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

I dont get it

5/8 + 7/12
41. ### math

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

Differentiate s=(2-t)^2 with respect to t
43. ### Math

I am a 5 digit number. All my digits are the same and the sum of digits is 40 .
44. ### 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?
45. ### math

solve y=0.04x^2+8.3x+4.3
46. ### 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
47. ### 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)
48. ### Math

I got 2/16 but I’m bad at math so idk
49. ### Math

Did John Cena ever do math? It doesn't look like he did..
50. ### 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!
51. ### 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 relate?
52. ### math

round to the nearest hundredths 1.5.
53. ### 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?
54. ### math

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

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

Thank you
57. ### 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, l=24, m=26, n=28, o=...
58. ### Math

Construct a right triangle having hypotenuse of length 5.6 and one of whose acute angle measure 30
59. ### 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 am confused.
60. ### 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
61. ### Pam

How to find the vertex ? f(x)= x^2-3
62. ### Pam

What is the horizontal asymptote? y=x^2+11x+16/x+8
63. ### 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)
64. ### Math

But how did you get 3/16?

Thanks!
66. ### 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?
67. ### 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° 43° 37° 27° 3. If m ?1...
68. ### math

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

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

Thanks
71. ### 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
72. ### Emma

Solve (?6+i)(?6-1)
73. ### 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?

75. ### Math

I took it and it says the answers are 1. B 2. A 3. B 4. C 5. B I changed answers 4 and 5 on my own before subbmitting and I am glad I did because this it what it says is right.
76. ### 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?

78. ### 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)?
79. ### 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

No idea
81. ### math

Find the value of K so that x^2-5x+k=0 has one root equal to 4.
82. ### 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?
83. ### Math

How many kg of pure salt must be added to 8 kg of a 30% solution to obtain a 35% soltution?
84. ### 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 it be 50ft above the ...
85. ### pre-calc

|2x+1| greater than or equal to |x-3|
86. ### Pre-calc

I trust Steve
87. ### 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?
88. ### 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?
89. ### 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?
90. ### 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:

68 times
92. ### 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 the unit of time to ...
93. ### 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 gravitational constant G?
94. ### 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 seconds.
95. ### 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 students studied ...
96. ### 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?
97. ### 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?
98. ### Math

Write out the full question please
99. ### 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?

54, 63 , 72
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