# Timothy

Most popular questions and responses by Timothy
1. ## Math: Algebra

1. Which method would be the simplest way to solve the system? 7x + 5y = 19 –7x – 2y = –16 A.) graphing B.) substitution C.) elimination D.) distributive I think it is C.

2. ## Science(Chemistry)

HCL+Al=AlCl3+H2 What is the ionic equation,the spectator ions and the overall or net ionic equations?

3. ## Chem

1) Which solution will have the lowest OH- A) Na2CO3 B) NaHCO3 C) NaCl D) NaHSO4 E) NH4Cl 2) Which solution will be the strongest base? A) Na2CO3 B) NaHCO3 C) NaCl D) NaHSO4 E) NH4Cl 3) Which aqueous solutions are acidic? A) Na2CO3 and NaHCO3 B) NaCl and

4. ## math

What is the greatest prime number you must consider to test whether 5141 is prime?

5. ## Ed Tech

when writing a personal narrative what point of view would be best to use

6. ## Math: algebra 1

3. Which method would be the simplest way to solve the system? y =1/2 x 2x + 3y = 28 A.) graphing B.) substitution C.) elimination D.) distributive I think it is B.

8. ## Physics

A knife thrower throws a knife toward a 300-g target that is sliding in her direction at a speed of 2.30 m/s on a horizontal frictionless surface. She throws a 22.5-g knife at the target with a speed of 39.5 m/s. The target is stopped by the impact and the

9. ## math

A musician plans to perform 5 selections for a concert. If he can choose from 8 different pieces, how many ways can he arrange his program?

10. ## Science

animals with bilateral symmetry

11. ## Math Algebra

Jessica is 4 years younger than Jennifer now. In 10 years, Jessica will be twice the age that Jennifer is now. Find the present ages of Jennifer and Jessica

12. ## Science

why do living things need food water and the ability to get rid of waste

13. ## chemistry

Calculate the concentrations of all species present in a 0.32 M solution of ethylammonium chloride (C2H5NH3Cl).

14. ## Physics

Suppose a block of mass of lead of mass 0.4kg at temperature 95°C is dropped in 2kg of water originally at 20°C in a container.calculate the final temperature if no heat is lost to the container and environment;

15. ## Math

If the radius of a right circular cylinder is tripled and its altitude is cut in half, then the ratio of the volume of the original cylinder to the volume of the altered cylinder is?

16. ## Math: algebra 1

6. In which quadrant does the solution of the system fall? y = x – 1 y = –3x – 5 A.) I B.) II C.) III D.) IV I think it is c.

17. ## Math

A man is in a tree house 7ft above the ground. He is looking at the top of another tree that is 24ft tall. The bases of the trees are 40ft apart. What is the angle of elevation from the mans feet to the top of the tree? Round to the nearest degree. 23 31

18. ## Math

If x is positive, and x is decreased by 3, then a^2 - x^2 is a) increased by 6x-9 b) increased by 6x c)decreased by 9 d)increased by 6x+9 e)decreased by 6x-9

19. ## Trigonometry

Hello all, In our math class, we are practicing the trigonometric identities (i.e., sin^2(x)+cos^2(x)=1 or cot(x)=cos(x)/sin(x). Now, we are working on proofs that two sides of an equation are equal (for example, sin(x)*csc(x)=1;

20. ## ELA

what is a key difference between the narrators of stolen day and the night the bed fell

21. ## physics(optics)

The critical angle between an equilateral prism and air is 45 degrees.if the incident ray is perpendicular to the refracting surface,then what happens?

22. ## Math

write 5x5x5x5x5x5x5 using an exponent

23. ## Chemistry

Which of the following statements about boiling points are false: A. the boiling point of 0.1 m KF(aq) is lower than the boiling point of 0.1 m ethanol(aq) B. the boiling point of a 0.5 m aqueous solution of NaOH is the same as the boiling point of a 0.5 m

24. ## Algebra

Given that a^2-b^2=0280 and a+b = 20, find the value of a-b.

25. ## math

Is 16.6 a rational number?

26. ## Mathematics for Liberal Arts

Determine a casino's expected net income from a 24-hour period at a single roulette table if the casino's total overhead for the table is \$50 per hour and if customers place a total of \$7,000 on single-number bets, \$4,000 on two-number bets, \$4,000 on

27. ## Trigonometry

Hello, everyone: I am working on finding the exact values of angles that are less common and are therefor not found easily on the Unit Circle (at least, they are not labeled). For example, the problem I am asking about is: 10) Find the exact values of the

28. ## Social Studies

How did Roosevelt’s response to German aggression toward Britain differ from his response to Japanese aggression toward China? I think it is C or D? A.He condemned the aggression toward China but not toward Britain. B.He condemned the aggression toward

29. ## Physics fundamentals

When a crate is moving on a track where friction is not negligible. The friction force is said to be kinetic friction static friction Non existant

30. ## government

A STUDY OF THE CAUSES OF THE AMERICAN REVOLUTION OF 1776 THE FRENCH REVOLUTION OF 1789 AND THE RUSSIAN REVOLUTION OF 1917 BEST DESCRIBES THE GENERAILIZATION THAT REVOLUTION IS MOST LIKELY TO OCCUR WHEN

31. ## 11 U chemistry

Predict the products of a reaction between solid beryllium chloride and solid potassium,write the products in a balanced chemical equation also indicate what type of reaction this is.

32. ## Physics 1

If you see an object rotating, is there necessarily net torque acting on it? Explain

33. ## Chemistry

How many grams of KNO3 (molar mass = 101.103 g/mol) should be used to make 325.0 ml of 0.070 M solution?

34. ## Trig.

Hey I am doing test corrections and need help, Which of the following inverse functions are defined for x=-1/2 ? Select all that apply. Y=tan^-1 x Y=cos^-1 x Y=sin^-1 x Y=csc^-1 x Y=sec^-1 x Y=cot^-1 x

35. ## Physics 1

Two balls have the same size and mass. One is hollow, the other one is solid. How would you determine which is which without breaking them apart?

36. ## Physics

The electric field from an infinitely large and uniformly charged sheet is independent of the distance from the sheet, yet the individual charges in the sheet all produce fields that object the inverse square law. Why doesn't the field get weaker at

37. ## Accountant

It is stand accounting procedures, or GAAP, to make an adjusting entry to remove the current year’s principle from the long-term liabilities. This entry reduces the long-term liabilities and increases the current liabilities. You are the bookkeeper for

38. ## Math

use rounding or compatible numbers to estimate the sum 5 x 2 3/5

39. ## Math

ABC is a right triangle with each leg divided into 5 equal segments as shown. If the largest trapezoid has the area 36 cm^2, then the area of the second smallest trapezoid is what?

40. ## Math

The squares of three positive integers are in arithmetic progression, and the third integer is 12 greater than the first. Find the second integer.

41. ## Math

write 2.3 x 10^3 in standard form

42. ## math

A Coast Guard ship patrols an area of 125 square miles. The area the ship patrols is a square. About how long is each side of the square? Round your answer to the nearest mile.

43. ## world geography

why are climates grouped by latitude?

44. ## Science(Chemistry)

Mg+H2O=MgOH+H2 What is the ionic equation,the spectator ions and the overall or net ionic equations?

45. ## pyshics

A small rock moves in water, and the force exerted on it by the water is given by the equation Fd = kv, where k is a constant. The terminal speed of the rock is measured and found to be 2.0m/s. The rock is projected upward at an initial speed of 6.0m/s.

46. ## Ela

to place the caption at the top of the image you will need to change the

47. ## Physics continued

Sorry, I didn't see that there was a second part to the question. What is the difference between this one and the previous question I posted? The x and y components of a certain force are measured and found to be Fx = 68 ± 3N and Fy = 42 ± 2 N,

48. ## physics

What equation do I use to find this? Thanks The x and y components of a certain force are measured and found to be Fx = 68 ± 3N and Fy = 42 ± 2 N, respectively. Calculate the error associated with the magnitude of this force?

49. ## uga

Assume the z test statistic equals 0.99, find the the p-value if Ha:p> 0.50

50. ## Science(Chemistry)

Explain what would happen when bromine water is added to potassium iodide solution and what is its balanced chemical equation?

51. ## Math

A bullet hole in the wall at height of 7'6 inches from the floor. Bullet passed through wall at angle 34 degrees. If they assume that the gun was fired from a height 4' above the floor, how far away from the wall was it when it was fired? (nearest inch)

52. ## Geomtry

Five fences meet at a point to form angles with measures x, 2x, 3x, 4x, and 5x around the point. Find the measure of each angle.

53. ## geometry

Find, to the nearest tenth of a centimeter, the length of a diagonal of a square if the measure of one side is 8.0 centimeters.

54. ## math

on one side of my street the homes all have odd numbers ending with the musa which is number 16 On the other side the number are all even ending with nwosu which is number 17 Femi olu is my next door neighbor and his house is number 9 you pass my house

55. ## Science

A hammer with a 500-g head exerts an average force of 810n on a nail speed as it drives the nail 4 mm into wall. What was the speed of the hammer head when it hit the nail?

56. ## math

A kicker punts a football from 3 feet above the ground with an initial velocity of 47 feet per second. Write an equation that gives the height (in feet) of the football as a function of the time (in seconds) since it was punted. Find the height (in feet)

57. ## grammar

Which is the correct verbal usage of the following sentence? I let it there while I stood and applauded or I left it there while I stood and applauded?

58. ## math- Calculus

If lim x->6 f(x)g(x) exists, then the limit must be f(6)g(6). True or false? Explain why it's true or false. Help!

59. ## Physics

A) An object with mass M=10kg is held on a incline. The object and the incline surfaces have a static friction coefficient of 0.3. What is the maximum angle at which the object starts moving? B) Again, suppose that the force in A) is a push applied

60. ## Physics

I think it is D) but I'm not quite sure. Thanks in advance! Right after the ball is thrown at angle of 45 deg, the acceleration is a)g b)sin(45) * g c)cos(45) * g d)tan(45) * g

Hello, could you guys let me know if this looks right? Thanks in advance. A ball is fired at a speed of 8 m/s at 20 degrees above the horizontal from the top of a 5m high wall. a) what is the total velocity at the maximum height? b) how far from the

62. ## math

If w whistles cost c cents, how many whistles can you get for d dollars?

63. ## math

If 8% of c is equal to 12% of d, which of the following is equal to c+d?

64. ## math

Don't laugh at me lol...it says Jamal is 5 feet tall. One sunny morning he notices that he casts a shadow that is 2 feet long. If the school building casts a shadow that is 7 feet long at the same time, what is the height of the building?

65. ## Geometry

A tree on a 30 degree slope grows straight up. What are the measures of the greatest and smallest angles the tree makes with the hill?

66. ## Science

Waht animals are in the Nile Delta? I already have crocodile & hippo. I need 1 more mammal, a type of fish, and an insect.

67. ## Science

ive got 2 questions: the star Vega is 25 lightyears away from us. if we sent a radio message to Vega, and another civilization on a planet circling that star answered us, in what year could we expect to hear a reply? why was it necessary to make radio

68. ## math

f(x)=sin(e^(4x)) f'(x)=??

69. ## math

Divide. Express answer in simplest form. 3 2/3 / 4 1/2

I need help with one less letter than the previous word. (its in a sentence.) Please explain more about your assignment. Are you trying to make a new word from a previous word?

71. ## MATHS

ACTUALLY NOT A STUDENT BUT I HAVE THIS PROJECT WORK. TO RESEARCH ON HOW INTEGERS CAME TO EXISTENCE, BY COURTESY OF WHO THAT ONE IS ABLE TO TELL IF HE COMES ACROSS AN INTEGER. I'LL LIKE TO ALSO GET COMMENTS FROM LEARNED PEOPLE WHO HAD FACTS ABOUT INTEGERS.

72. ## Logic

What is it that comes i. Once in a year ii. Twice in a months iii. Four times in a week iv. Six times in a day

73. ## Math

1. -7/9 x 3/5 2. -2/5 x -1 1/4 3. 1 3/5 x - 3/4 4. -7/8 x -1 3/7

74. ## math

Lucia is hoping that Angela will buy her a geometrically interesting piece of land on which he will build a mansion. Lucia has said that she will only buy the land if it costs less than \$4.00 per square foot. The plot shown below is listed for \$453,175. Is

75. ## Math

There is a football field. Around the field is the section of a spectator. The edge of the football field is 5 meters distance from the outside edge of the section of the spectator. The section of the viewer is 130m in length and has a width of 85m. The

76. ## math

If x and y are reciprocals of each other, then their product always equals A. 1 B. x^2 C. y^2 D. 1/x^2

77. ## math

On a certain legislative committe, 3/8 of the committee members are Republicans. If 2/3 of the members are men and 3/5 of the men are Democrats, what fraction of the members are Democratic women?

78. ## Physics

A music is played causing 82 dB. A baby cries causing 72 dB annoying the people around him by 123.7 m. What is the sound intensity level?

79. ## Physics

A skydiver falls in air reaching terminal velocity, he shouts to his friend at 2000 Hz. His friend receives it at 2355 Hz, what is the divers speed?

80. ## Physics

Two organ pipes are imitating a sound of 12 Hz, one of them is 12 m long. What is the length of the other pipe?

81. ## math

solve by completing the square x^2-3x=4 please show work

82. ## Math: Algebra 1

2. What is the solution of the system? 7x + 5y = 19 –7x – 2y = –16 A.) (2, 1) B.) (1, 2) C.) (7, 5) D.) (–7, –2) I think it is A.

83. ## Chemistry

A student reacted 5.33 grams of cobalt with oxygen gas and obtained 7.50 grams of cobalt oxide. Determine the empirical formula of this cobalt-oxygen compound based upon this experiment.

I have to put these in the past tense-Are they correct? 1. Tú hablas por teléfono. Tú habaste por teléfono. 2. Nosostros bailamos mucho los fines de semana. This would be the same in past tense, I think?? 3. Tú y yo cantamos los domingos. This would

85. ## Math

Find the present value needed to have \$ 1.00 compounded quarterly for 5 years at 6% using the formula (a) 74 ¢ (b) 75 ¢ (c) 76 ¢ (d) 77 ¢ (e) 78 ¢

86. ## HSM 220

what are thre ways human resources help support the strategic goals of human service organizations?

87. ## math

A 75ft diagnol brace on a bridge connects a support of the center of the bridge The horizontal distance that it spans is 15ft longer than the hieght that reaches on the side of the bridge.Find the horizontal and vertical distance spanned by this brace

88. ## physical

A boy throws a stone vertically up to a man standing at a heigt of 2 m above the boy. Of the stone is thrown up with a velocity of 7.0m s what is the velocity of the stone at the instant when it is caught by the man. A clear explaination is greatly

89. ## math

Please help me I am confused on this math problem. solve. y/8-8/y=0 what are the solutions? Wouldn't they be 0?

90. ## math

what is the dividend to the following equation? /3 2/5=10

91. ## Geometry true or false

I just needto check to see if i'm right... It would be false right? Is the statement below true or false? All triangles have three angles, or all squares have nine sides. True False

92. ## Math

A rectangular cube with sides measuring 4 cm, is made with 1 cm^3 blocks. Two straight tunnels of 4 cubes each are taken out. All exposed surfaces are painted including inside the tunnels. How many small cubes have been painted on exactly 3 faces?

93. ## math

in triangle SET, ES is congruent to ET, measure angle S = 4x - 6 and measure angle T = 3x + 3. Find the measurement of angle S, angle E, and angle T

94. ## Maths

x+2y = 87, x+y =52. The value of 4x-3y is?

5^2x 4+2^3

96. ## algebra

-3(4y-9)+2(2y+6)

97. ## Math

Paul runs a speed of 9 miles per hour. How many miles per second is his speed?

98. ## physics

How do you find the scalar product of two vectors, A=8m along the y-axis in the negative direction and B=15m, 30 degrees from the y-axis in the first quadrant. Thanks!

99. ## math

game board 23 1/2 inches on all 4 sides= what will be the size of 64 squares on the board=