1. Math

1.) Can a system of linear equations have exactly two solutions? A. True B. False 2.) The solution of a system of equations with no solution describes what kind of lines? a.) parallel b.) perpendicular c.) skew d.) coincidental

2. science

I need an acrostic poem for the element Sodium?? puhleez?! THANX!!!

4. physics

A merry-go-round (pictured) is sitting in a playground. It is free to rotate, but is currently stationary. You can model it as a uniform disk of mass 200 kg and radius 110 cm (consider the metal poles to have a negligible mass compared to the

5. Algebra 2

Use the Binomial Theorem to expand the binomial: (d – 4b)^3

6. Healthcare Statistic

Create a null hypothesis for the following research questions: a. What are the differences between emergency room shifts on medication errors? b. On a clinical trial of a new drug, what will be the effects over a currently use drugs?

7. Math

A jar of peanut butter which is 3 inches in diameter and 4 inches high sells for \$0.60. At the same rate, what would be the price for a jar that is 6 inches in diameter and 6 inches high?

8. Math

Canada Computers is having a sale on extra RAM.  Ronnie calculates that the sale price of RAM is   \$5.45/mb .  How much will Kareem pay for 10.8 mb of extra RAM?

9. physics

A skier slides horizontally along the snow for a distance of 20.8 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is 0.0449. Initially, how fast was the skier going?

10. Math

Ricardo is 4 years older than his sister rosa,if their ages are added together,the sum is 14. What are the ages of Ricardo and rosa?

11. PHYSICS

A merry-go-round (pictured) is sitting in a playground. It is free to rotate, but is currently stationary. You can model it as a uniform disk of mass 190 kg and radius 100 cm (consider the metal poles to have a negligible mass compared to the

12. Trigonometry/Geometry - Inequalities

Let a, b, and c be positive real numbers. Prove that sqrt(a^2 - ab + b^2) + sqrt(a^2 - ac + c^2) is greater or equal to sqrt(b^2 + bc + c^2). Under what conditions does equality occur? That is, for what values of a, b, and c are the two sides equal? This

13. microeconomics

charlie loves watching teletubbies on his local public tv station,but he never sends any money to support the station during its fundraising drives.

14. BIOLOGY

How will you prepare a laboratory procedure to verify the validity of the hypothesis? Give example.

15. Health (Ms. Sue)

1. Identify ways that you can tell if a relationship is healthy. Discuss what you can do if the relationship isn't healthy. A: You can tell if a relationship is healthy by asking yourself a series of questions, such as whether this friendship brings out

16. Health (Ms. Sue)

Identify ways that you can tell if a relationship is healthy. Discuss what you can do if the relationship isn't healthy. A: ?

17. Math Homework

Hello! I need help with these math questions, thanks! :) 1.) Solve the system by substitution. 5x + 2y = -17 x = 3y 2.) Solve the system by substitution. x/3 + y = 4/3 -x + 2y = 11 3.) Solve the system by elimination. 2x - 3y = 0 2x + 6y = 3 4.) Solve the

18. Grammar

Which sentence demonstrates correct use of modifiers? A) Startled by the noise, the alarm clock was knocked on the floor. B) Kendah found a broken glass washing her dishes. C) Rocco gave snacks to his friends in plastic bags D)Standing on a chair, I was

1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such that pq is tangent to

20. Healthcare Statistic

Given the following p values, which would be considered more significant? p ≤ .3 p ≤ .02 p ≤ .25 p ≤ .025

21. American Government

Television advertisers tend to prefer programs that are A. Intellectually thought-provoking B. conventional and inoffensive C. Controversial and challenging D. Overly concerned with factual information

22. Healthcare Statistic

Given the following null hypothesis, give an example of a Type I error. H0: There is no difference between the number of males or females who go to their primary care physician for an annual exam.

23. chemistry

What volume of chlorine gas at 42.0 oC and 1.30 atm is required to react completely with 34.2 g of phosphorus (P4) according to the following reaction?

24. Stats

If a student's rank in a class of 300 students is 111, find the student's percentile rank

25. Math Help!

1.) Solve the system by graphing. You may use paper or a calculator. 2x - y = 8 x + 3y = 11 2.) The revenue for a certain brand of toothpaste is y = 2.5x where 'x' is the number of tubes of toothpaste sold and 'y' is the total income for selling 'x' tubes.

26. us history

The first major battle of the civil war took place at Vicksburg Manassas Antietam Shenandoah I chose Antietam. Right

27. BIOLOGY

How could you repair an electric fan that is not working properly? Apply the scientific method.

28. Math

1.) Solve the system by graphing. You may use paper or a calculator. 2x - y = 8 x + 3y = 11 2.) The revenue for a certain brand of toothpaste is y = 2.5x where 'x' is the number of tubes of toothpaste sold and 'y' is the total income for selling 'x' tubes.

29. Math

the right triangle ABC, the altitude from vertex C divides the hypotenuse into two segments, one of length 2 and the other of length 16. Find the perimeter of triangle ABC.

30. Math

In a triangle ABC, AC = 36, BC = 48, and the medians BD and AE to sides AC and BC, respectively, are perpendicular. Find AB I tryed to find the sides using Pythagorean theorem but it's not working

31. Physics

A 2.1 kg pendulum bob hangs from a 2 meter string. It is pulled to the side, position A, so that the bob is 79 cm (h on the sketch) above the lowest position, position C. The bob is released and begins to swing. See below.

32. us history

ALL the following accurately characterize the advantages of the North and South EXCEPT: a. The Union had far greater industrial capacity, more railroads and more ships. b. The South had far more usable food supplies than did the Union. c. The Union had

33. Math

Identify the property illustrated by the statement -2(5+9)=-2•5+(-2)•9 A) associative property of addition B) associative property of multiplication C) distributive property D) commutative property of multiplication

34. Health (Ms. Sue)

Are these adequate ways to cope with the changes that I have experienced? State three ways that you have experienced during adolescence. Then, identify two changes to cope with these changes. A: Three of the changes during adolescence that I have

35. Statistics

Two-thirds of papaya plants availabe are hermaphrodite and are self-pollinating. One-third of plants are female and need to be paired withh an hermaphrodite plant in order to be pollinated. Unless the plants are pollinated, they will not bear fruit. If you

36. Healthcare Statistic

Given the following null hypothesis, give an example of a Type II error. H0: There is no difference in the level of understanding of this chapter between students who have previously taken a statistics course and students who have not previously taken a

37. Finance

Chip’s Home Brew Whiskey management forecasts that if the firm sells each bottle of Snake-Bite for \$20, then the demand for the product will be 15,000 bottles per year, whereas sales will be 90 percent as high if the price is raised 17 percent. Chip’s

38. Math

Need help on this one. You have a spinner numbered 1 through 8. What is the probability of spinning a factor of 4 and a multiple of 2? I know the first part would be 3/8 * _ but them I'm not sure for the second fraction if it would be 4/8 or 2/8. Thanks

39. Physics IMP

A yoyo of mass m= 2 kg and moment of inertia I_cm= 0.09 kg m consists of two solid disks of radius R= 0.3 m, connected by a central spindle of radius r= 0.225 m and negligible mass. A light string is coiled around the central spindle. The yoyo is placed

40. Physics

I've been trying to solve this problem for the longest time, but I still can't get the answer. The answer is apparently 36 degrees below the horizontal. Please explain!! (: A missile is launched from the ground with a speed of 100 m/s at an angle of 45

41. BIOLOGY

Identify name at least one biological science problem and prepare a procedure on how to solve such problem then recommend solutions.

42. Health (Ms. Sue)

Describe why it is important for teens to separate feelings and behaviors. A: Separating feelings from behaviors is important because this action makes a teenager truly more mature and independent?

43. BIOLOGY

Differentiate plants from animals based on the following: structure, locomotion, irritability, metabolic process, waste products, growth and development, outer covering and food making processes.

44. Math

In triangle ABC, D bisects side BC, G bisects side AB, and the points E and F trisect side AC. What is the area of the shaded polygon, if the area of ABC is 108? I tryed to find the area of triangles on the side and I figured that if you put a line from

45. Calculus

Given that C(x)=2x^3-21x^2+36x+1000 is a cost function, determine the intervals for which the cost is increasing. Determine any intervals for which the marginal cost is increasing. Marginal cost is when you derive the cost function, correct? So do you do

Given that C(x)=2x^3-21x^2+36x+1000 is a cost function, determine the intervals for which the cost is increasing. Determine any intervals for which the marginal cost is increasing. Marginal cost is when you derive the cost function, correct? So do you do

47. Physics Classical Mechanics

A block of mass m=2 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=Beta t^2, where Beta = 1.0 N/s^2. We stop pushing at time t1, 5s [F(t)=0 for t>1]. (a) First,

48. math

Ines became the manager of an electronics store. She decided to provide customers with a great holiday deal. A customer will be able to purchase 3 big screen televisions at the following price, the first one at the full price of \$750, the second one will

49. Math

Many people are trying to reduce their carbon footprint. Amrita’s carbon footprint this year was  85% of last year’s footprint.  If her carbon footprint this year is 34 tonnes, what was her carbon

50. Health (Ms. Sue)

1. Describe three ways that teens can take on more responsibility at home. A: Teenagers can take on more responsibility at home by cleaning after themselves, watching their younger siblings while their parents are absent, and preparing meals for not only

51. BIOLOGY

Discuss the substances needed to carry out the food making process (photosynthesis) by plants and the products of such process.

52. computers

The ACME Company has approached you with a request to develop the psuedocode that will control the operations of their new series of vending machines. The program will be required to maintain the product inventory and money reservoir. The program should do

53. ELA

Can you help me find a poem that is similar to "Infant Sorrow"?

54. Science

For a cell of the CsCl type (figure 9.18), how is the length of one side of the cell,s, related to the sum of the radii of the ions, r subscript cation + r subscript anion? Figure 9.18 : i . imgur . com / zHj2SGW.png Another question : Consider the NaCl

55. Math

Cassandra is two thirds as old as Jeremy. Three years ago she was half as old as Jeremy. How old are Cassandra and Jeremy? I got this question wrong and was wondering what I did wrong. This is what I did. Now 3 years ago Cassandra| C | C-3 Jeremy | J | J-3

56. math

The cost of refreshments (in dollars) is a function, h, of the number of people served, n. If h(n)=100/9n, find the number of dollars it would cost for refreshments for 27 people.

57. algebra

For a motor vehicle travelling at r miles per hour, the distance d in feet required to stop at approximately d=0.05r^2+r. If a school bus is traveling at 45mph how many feet to, the nearest foot,would it travel before coming to a halt.

58. math

A car dealer has 30 cars and trucks. If 2 more cars are delivered, the dealer will have 3 times as many cars as trucks. How many does trucks does the dealer presently have?

59. Probability

Suppose that you visit Shire, and find that 28% of Hobbits believe in the existence of Elves, 16% believe in the existence of Ents, and 9% believe in the existence of both Elves and Ents. You come across a Hobbit: i) What is the probability that he will

60. math

Ali needs to borrow Rs 500,000 for three years. Which of the following option is more beneficial for him? (i) 3.2 % simple interest rate (ii) 1.6% compound interest rate when it is compounded semi annually

61. math

Suppose you are managing an account in which you deposit Rs. 20,000 at the end of each year for 20 years. How much amount you have accumulated with the assumption that you earn 5% interest compounded annually.

62. math

1.64g of a mixture of cac03 and mgc03 was dissolved in 50ml of 0.8M hcl. The excess of acid required 16ml of 0.25M naoh for neutralization. Calculate the percentage of cac03 and mgco3. The right answer mgc03 52.02% caco 47.98% Who help for me step by step

63. BIOLOGY

Why are traits/scientific characteristics important in the field of science?

64. Science need help???

A student wishes to test the accuracy of the measuring jug she is using in an experiment. The label on the jug claims that it measures volume to an accuracy of plus or minus 5 cm3. The density of water is about 0.999 g cm−3, which means that 100 cm3 of

65. math

A ferris wheel has diameter of 24 m and is 4 m above ground level at its lowest point. Assume that a rider enters a car from a platform that is 30^0 around the rim before the car reaches its lowest point. Model the rider's height above the ground versus

66. BIOLOGY

Compare the basic principles on which the Darwin’s natural selection and Lamarck’s concepts of evolution are based.

67. BIOLOGY

How is the evolution of animals the long necked giraffe explained by Charles Darwin?

68. BIOLOGY

Name and discuss the levels of organization in a multicellular organism starting from the basic unit or structure of life.

69. Calculus

Using the equations R(x)=-x^2+400x and C(x)=x^2+40x+100, find the Maximum Revenue

70. math

how do i use at-least 8 points to make some sort of geometric figure that can be recognized by my teacher , which should be drawn only in quadrant 1 and not on an axis. a vertex matrix should be set u using this figure???????

71. English

Hello. I would highly appreciate some language help from a native speaker of English. Do you think the following sounds natural English: 1)the topicality of the present study is prompted by the fact that... (maybe the word "relevance" is better here?)

In triangle ABC, D bisects side BC, G bisects side AB, and the points E and F trisect side AC. What is the area of the shaded polygon, if the area of ABC is 108? I tryed to find the area of triangles on the side and I figured that if you put a line from

73. Physics

If a person lifts a 21.9 kg bucket very slowly from a well and does 8.3 kJ of work on the bucket, how deep is the well?

74. American government

Political action committee contibutions typically A. are donated at the request of an elected official. B. go to incumbent candidates of both parties. C. go to the challenger to promote more competitive elections D. both A and B are correct The answer is d

75. math

4x + 4 = 9x - 36 my answer is 8

76. Math

Two-thirds of papaya plants availabe are hermaphrodite and are self-pollinating. One-third of plants are female and need to be paired withh an hermaphrodite plant in order to be pollinated. Unless the plants are pollinated, they will not bear fruit. If you

77. Calc 2

Find the area enclosed by the equations x=16-y^2 and x=y^2-16

78. econ

What has the real GDP for the US been like for the past 10 years, and what does this mean for the economic health of the nation?

79. STATISTICS

Two-thirds of papaya plants availabe are hermaphrodite and are self-pollinating. One-third of plants are female and need to be paired withh an hermaphrodite plant in order to be pollinated. Unless the plants are pollinated, they will not bear fruit. If you

A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m=

81. algebra

How would you solve this one 40x^5-56x^4+24x^3 divided by -8x^2

82. Trig

To avoid a steep descent, an airplane flying at 10,000m starts its descent 60km away from the airport. For the angle of descent to be constant, at what angle should the plane descend?

83. life science,history,6eography,and maths lit

im in grade 12 and i dn't no wht job must i take so can you plz tell me wht kind of jobs is available

84. Physics magnetism

The inductor in the circuit has a resistance of 100 ohms connected to a long solenoid with a loop density of 100 turns per centimeter and 59 H inductance connected to a 12 V battery. When the switch has been closed for a long time, what is the magnetic

85. electromagnets

A 100 gram resistive slider (thick line) moves without friction along a vertical U-shaped conducting track (thin line) that is 50 centimeters wide in a magnetic field of 5 Tesla as shown. The slider's resistance is 20 Ohms. It falls under the influence of

86. Physics

A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m=

87. Statistics

Find the Standard Deviation for this distribution of scores. Then find the z score for X=86. N=17 98, 92, 86, 84 , 76, 74 , 72 , 72, 72 , 70, 70, 66, 60 ,54, 32,30

88. Health (Ms. Sue)

State three changes that you have experienced during adolescence. Then, identify two ways to cope with these changes. A: ?

89. math

A typical 1-hour television program devotes 10% of each hour to commercials. At this rate, how many minutes of commercials would a 3 hour program have?

90. Math

How many 3 digit numbers can be made using the following digits only once in each number? Use the digits : 2,3,4

91. Calculus

Check my work? The equations given were R(x)=-x^2+400x and C(x)=x^2+40x+100. We were asked to find the maximum profit and minimum average cost. (I'm having trouble remembering how to find a minimum and maximum, so please help with that, if you can!) For

92. Physics Classical Mechanics

Hi Enjoy, Thanks. I got the acceleration right and the Force wrong. Need help on Question 2.

93. Math

In triangle ABC, D bisects side BC, G bisects side AB, and the points E and F trisect side AC. What is the area of the shaded polygon, if the area of ABC is 108? I tryed to find the area of triangles on the side and I figured that if you put a line from

94. Math

An appliance is on sale at 30% discount. If the sale price is \$42.00, what was the original price of the appliance?

95. fundamentals of programming

The ACME Company has approached you with a request to develop the psuedocode that will control the operations of their new series of vending machines. The program will be required to maintain the product inventory and money reservoir. The program should do

96. Calculus

Find the maximum revenue using the following equations: R(x)=-x^2 +400x and C(x)=x^2+40x+100. What I've done so far is use R(x) and solve for x, which got me 0 and 400. Is that how you're supposed to start it? What happens next? (I apologize; I'm really

97. Calculus (check my work)

Find the marginal revenue at x=10 using the equation R(x)=-x^2+80x Is the answer 60?

98. criminal justice

Why do intermediate punishments have such a small role in punishment policy and practice?

99. math

find the area under the normal distribution curve between z = -1.25 and z = 2.20

100. math

find the area under the normal distribution curve to the right of z = -2.40

101. English

What are the similarities between Romeo and Juliet and The Machine stops

102. math

5h - 9 = -16 + 6h

103. math

12 - q > and equal to - 13

104. Classical Mechanics Physics - Urgent help please

A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m=

105. SAT Math

I don't remember what problem I struggled to understand... But it was something like this... There are 3000 numbers so how many of them are odd.. Something like that.. Please give me a problem like that and please teach me!!!! I hope you know what I am

106. Career

Can I become both an optometrist and a pediatric optometrist or do I have to be one of them.... My question is that am I qualified for both??? Or in other words, am I eligible to do both or have the ability to do so...

107. SAT MATH

I don't remember what problem I struggled to understand... But it was something like this... There are 3000 numbers so how many of them are odd.. SometI don't remember what problem I struggled to understand... But it was something like this... There are

108. 6.002x midterm

can someone help me with midterm? Q5.1 : 1 Q5.2 : Vil - Vol Q5.3 : Voh - Vih Q5.4 : Vih - Vil Q5.5 : [(Vs*2*Ron)/(VoL)] - (2*Ron) Q5.6 : [VS^2/(RON+RPULLUP)]

109. calculus

find the area of y=x sqrt(x^2+16), bound by the x-axis and the vertical line x=3 I got 22.5 is that correct?

110. Math

Solve this substitution: 2x-5x=-8 -3x-2y=-26

111. Calculus

Consider the function f(x)=2x+6x^(-1). For this function, there are three numbers A

112. college algebra

solve the system 2x+y=-4 -x+y= 2

113. Math

How many integers are common to the solution sets of both inequalities? x+7≥3x 3x+4≤5x

114. us history

African American troops in the Union army: A.were from the begining an itergral part of mnay fighting units. B.distinguished themeselves in battles in Louisiana. C. None of these I read first. And I came up with B. is this right.

115. math

What is the 43rd digit after the decimal point in the decimal representation of 1/13?

116. trig

Points X, Y, and Z are on the circumference of a circle with radius 2 such that

117. math

Identify the solution(s) of the system of equations, if any. 2x+5y=10, y=2-x

118. Science

Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of

119. Math

Identify the property 16+(13+9)= (16+13)+9 A) identity element for addition C) associative property of addition

120. physics Classical Mechanics

Enjoy, How did you find the answer to question on the yoyo I got it wrong, and question number 2 on torque. Thanks.

121. math

what operations are assciated with reciprocals?

122. Trigonometry

find the angle theta between two vectors v=-sq. root of 3/2 i+-square root of 3 / 2 j and w=4 square root of 3 i +4j

123. Calculus

How do you find maximum revenue, maximum profit, and minimum average cost? Our teacher gave us a project to teach ourselves the section, but I can't learn very well even with her teaching, so I don't know how I'm supposed to do this...

124. BIOLOGY

Why is there a need for a scientist to know the limitations of science?

125. BIOLOGY

Why is a control set-up being done in the conduct of an experiment? Give example.

126. Trigonometry

Find the angle θ between the vectors v = - ((3)^1/2)/2 I +(-((3)^1/2) j and W = 4(3)^1/2 i+ 4 j

127. Math

If there's one child that can be zero interactions if there are two children the three interactions if their three children they can be 12 interactions if there are four children there can be 39 interactions which recursivity equation represents the