# Posts by Iris

Total # Posts: 250

1. ### science

An empty beaker weighs 20g and when filled with a liquid weighs 65g. The volume of the liquid is found to be 25cm³. Determine the density of the liquid
2. ### science

An empty beaker weighs 20g and when filled with a liquid weighs 65g. The volume of the liquid is found to be 25cm³. Determine the density of the liquid
3. ### vectors

Thank you so much :)))
4. ### vectors

If |x| = 11, |y| = 23, and |x-y| = 30, find |x+y|. Textbook answer: 20
5. ### science

A weight of 500kg is suspended by two chains 1.5m and 2.7mrespectively.the chains are attached to a beam that is 3.746m in length. The distance from the suspension to the ground being 900m. A.Calculate the load. B.the vertical and horizontal reactions at the suspension points.
6. ### Writing skills

WHETHER OR NOT WE HAVE CHOSEN TO USE OUR LICENSES SINCE THEN, THEY REMAIN OF ENORMOUS VALUE TO US.
7. ### chem 11

Chloroform, CHCl3, has a boiling point of 62 oC, whereas methane, CH4, has a much lower boiling point of -164 oC. Using diagrams, explain the difference between the two boiling points.
8. ### Pre-Calculus

The cost of sending a package overnight is \$14.40 for the first pound and \$3.90 for each additional pound or portion of a pound. A plastic mailing bag can hold up to 3 pounds. The cost f(x) of sending a package in a plastic mailing bag is given by the following function, where...
9. ### Pre-Calculus

Which of the following shows the correct notation for “The limit of x^2 - 1 as x approaches 3. A. lim x^2-1 x->3 B. lim3 x->x^2-1 C. lim(x^2-3) x->x^2-1 D. lim(x^2-1) x->3 Thank you
10. ### Pre-Calculus

What is the correct notation for “The limit of x^2 - 1 as x approaches 3? Thank you
11. ### Pre-Calculus

How does the expansion of (x + y)n and (x - y)n differ? If you can offer an example that would be very helpful. Thank you
12. ### Pre-Calculus

Find P_(k+1) if P_(k)=2^(k-1)/k! (I used _ as a sign for a subscript) A. 2^(k+1)/(k+1)! B. 2^k/(k+1)! C. 2^(k+1)/k!+1 D. 2k/k!+1 Thank you
13. ### Pre-Calculus

Which of the following shows the correct first step to prove the following by mathematical induction? 3 + 11 + 19 + 27 + … + (8n - 5) = n(4n - 1) A. 3 + 11 + 19 + 27 + … + (8 • 1 - 5) = 1(4 • 1 - 1) B. 8 • 1 - 5 = 1(4 • 1 - 1) C. 3 + 11 + 19 + 27...
14. ### Pre-Calculus

Find P + 1 if Pk = 7 + 13 + 19 + ...+[6(k - 1)+1] + (6k + 1) (the k+1 and k in front of the P are subscripts) A. 7 + 13 + 19 + …+[6(k - 1) + 1] + (6k + 1) + [6(k + 1) + 1] B. 8 + 14 + 20 + …+[7(k - 1) + 1] + (7k + 1) C. 7 + 13 + 19 + …+(6k + 1) D. 7 + 13 + 19...

?*
16. ### Pre-Calculus

Can someone please explain how eccentricity can be used to classify conics.
17. ### Calculus

Use a graphing utility to graph the polar equation shown below. r = cos 5? + n cos ?, 0 ? ? ? ? For the integers n = -5 to n = 5. As you graph these equations, you should see the graph change shape from a heart to a bell. I'm sorry. I'm having issues with graphing this.
18. ### English

How is close reading related to annotation? How are they similar?
19. ### Pre-Calculus

Convert to rectangular: 4=4sec theta A. y=2 B. y=4 C. x=2 D. x=4
20. ### Pre-Calculus

Convert to rectangular: theta=(2pi)/3 A. y=-sqrt3 B. y=-sqrt3x C. x=sqrt3 D. x=-sqrt3y
21. ### Pre-Calculus

Convert to rectangular: theta=2pi/3
22. ### Pre-Calculus

Which are examples of the use of parametric equations? A. Position of a person on a ferris wheel. B. Position of a ball after being thrown. C. A and B D. Neither A nor B
23. ### Pre-Calculus

Which is the best example of the use of parametric equations? A. Measuring weight on the moon. B. Finding the position of a person in a city. C. Determining the position of a satellite during a specific time of day. D. Finding the right parameters to use for a construction ...
24. ### Pre-Calculus

Can you please give and example of a hyperbola and ellipse with the same vertices and center that I can graph? Then explain the similarities and differences between the graphs.
25. ### Pre-Calculus

given: ((x-2)^2/9)+((y-4^2/16)=1 what is the major axis?

27. ### Texas History

Why did Santa Anna attack the Alamo? A. It had a supply of gold. B. It was an important strategic location. C. It was his family’s ancient homeland. D. It would ensure a glorious victory.
28. ### Calculus

Which of the following would be the best first step when solving the following system using the substitution method? x - y = -4 ; x + 2y = 5 a. x = -4 - y b. x = -4 + y c. 2y = 5 - x d. 2y = 5 + x
29. ### Trig

find the angle between u=7i+2j and v=-4j
30. ### Calculus

Given: u <-1, 7> and v <4, -3> What is the measure of the angle between them?
31. ### Pre-Calculus

Given: u <-1, 7> and v <4, -3> Find: (u • v)(u + v)
32. ### Calculus

Find the dot product of: <-1, 7> and <2, ¾>.
33. ### Calculus

What is the unit vector of v: <-6, -8>?
34. ### Calculus

Given the vectors u = <−3, 7> and v = <5,1>, find 3u + 2v.
35. ### Trig

Given tan(A) = 2 and A is in Quadrant I, find cos(2A). A. 0 B. 1 C. 1/2 D. -3/5
36. ### Trig

Just confused. Given tan(A) = 2 and A is in Quadrant I, find sin(2A). A. 0 B. 1 C. 1/2 D. 4/5
37. ### Pre-Calculus

Given Tan(A) = 5 in Quadrant III and Sin(B) = ⅔ in Quadrant II, find Cos(A-B).
38. ### Pre-Calculus

Given Sin(A) = ⅗ and Cos(B) = 8/17 in Quadrant I, find Sin(A+B).
39. ### Pre-Calculus

A.Verify the identity. B.Determine if the identity is true for the given value of x. Explain. [cot(x) – 1] / [cot(x) + 1] = [1 – tan(x)] / [1 + tan(x)], x = π/4 I solved A and I believe it's true; however, I need help with B.
40. ### Pre-Calculus

A.Verify the identity. B.Determine if the identity is true for the given value of x. Explain. Sec(x) / tan(x) = tan(x) / [tan(x) – cos(x)],x = π I already solved A and I believe it's true; however, I need help with B.
41. ### Pre-Calculus

This question has me stuck. Use the Pythagorean identity sin^2 Θ + cos^2 Θ = 1 to derive the other Pythagorean identities, 1 + tan^2 Θ = sec^2 Θ and 1 + cot^2 Θ = csc^2 Θ. Discuss how to remember these identities and other fundamental identities.
42. ### History! Help!

Yea! A. It created large populations
43. ### History! Help!

The Caddo were an American Indian group in Texas that practiced agriculture and build permanent houses. What can be inferred about the group? A. It created a large population B.It formed a small and defenseless population C.It had no contact with other groups D.It was nomadic ...
44. ### History! Help!

The Atakapans occupied the region from the Sabine river to the A. San Jacinto river B. Red river C. Colorado river D. Trinity river Both the Karankawa and Atakapans relied heavily on which resources? A.rival groups B.fish and shellfish C.settlers D.trees and nuts Both the ...
45. ### History! Help!

Is that right?
46. ### History! Help!

Well.... it would be A?
47. ### History! Help!

Which of the following lists the start of the agricultural revolution according to absolute chronology? A. AD 500 B. after hunting and gathering C. post-Spanish exploration D. 5000 BC
48. ### Pre-Calculus

Which of the following statements best describes the domain of the functions sine and arcsin? A)Sine domain is all real numbers; Arcsin domain is all real numbers. B)Sine domain is restricted; Arcsin domain is all real numbers. C)Sine domain is all real numbers; Arcsin domain ...
49. ### Pre-Calculus

Use a graphing utility to graph the function y = d + a sin (bx - c) for different values of a, b, c, and d. Write a paragraph describing the changes in the graph corresponding to changes in each constant.
50. ### Pre-Calculus

You are given the value of tan Θ. is it possible to find the value of sec Θ without finding the measure of Θ? Explain.

125
52. ### Math

opps i ment to put 1/2 sometimes it dosent work

54. ### Social Studies

The correct answer is B, abolish slavery by ratifying the thirteenth amendment and condemn the act of secession.
55. ### health

Trinity is correct, and 16 is B. Thanks Jake and Trinity. :)
56. ### science !!

The first one is D and the second one is B. Just took this, got 100%
57. ### college algebra2

a triangle whose base is 18 inches long has an area of 280 square inches. find the area of a similar triangle whose base is 6 1/4 feet long.
58. ### Science

Yes, the correct answer is definitely B, high altitude.
59. ### Social Studies Help

opps 1.A 2.B 3.C 4.A 5.D 6.B
60. ### Social Studies Help

1.A 2.B 3.C 4.A 5.A 6.D 7.B
61. ### Social Studies Help

The social unit most responsible for teaching the custom and traditions of a culture is? (A) The family (B) The government (C) The army (D) The schools Two important features of a culture are? (A) Weather and writing (B) Language (C) Economy and Climate (D) Natural resources ...

ok
63. ### Math

I had chose B but i am not entirely sure
64. ### Math

Which number is equivalent to 14/4? A 3.2 , because 14 divided by 4 is 3 with a remainder of 2 B 3.5 because 14 divided by 4 is 3 with a remainder of 2 and 2/4 = 0.5 C 3.3 because 14 divided by 4 is 3 with a remainder of 3 D 3.6 because 14 divided by 4 is 3 with a remainder of...

66. ### Health

Thanks all! D False A 100%

Yes, those are the correct answers.
68. ### Shalee ^~^

Thanks bruh, you are correct. B C B A 100%
69. ### Science

The answers are: 4. A 12. B 15. C 16. B 17. C 19. A Trust me, 100%
70. ### Math

Hayden had 2 1/2 gallons of water in his watering can. The seed packet said to use 1/4 of a gallon for peppers and 5/8 of a gallon for tomatoes. Hayden then used some of the water for lettuce. If Hayden had 3/4 gallons of water left over, about how much water did he use for ...
71. ### Science

How can you evaluate scientific claims? NEED HELP!
72. ### Science

how can models help in science, why they are important, what and some examples of models.

1/16
74. ### Physics

An 83-kg fireman slides down a fire pole. He holds the pole, which exerts 500-N steady resistive force on the fireman. At the bottom he slows to a stop in 0.49 m by bending his knees. Determine the acceleration of the fireman while sliding down the pole.
75. ### Art

Do all art paintings have culture in the paintings
76. ### Science

that is better Thxs That really helps me
77. ### Science

the model at UTPA
78. ### Science

Need some help? How is the model of King Tut like other models used by scientists?
79. ### LA

what is the difference between internal conflict and external conflict Need help A.S.A.P

welcome

82. ### Math

oh ok i get it now
83. ### Math

i do not understand if it is 6% then is this explanation how you got 12%. which is it 6% or 12%
84. ### Social Studies

ok i will do it on my own good night

kk
86. ### Social Studies

ok srry my original question is Why did most major northeastern cities in the United States develop along the coast? and it does have why in the beggining
87. ### Social Studies

but i still do not get what reed means he says "The answer to "why" is "yes"

oh yeah
89. ### Social Studies

i do not get you reed

yes
91. ### Social Studies

is that right

ships
93. ### Social Studies

Why did most major northeastern cities in the United States develop along the coast?

iris
95. ### Social Studies

i know you all might be mad but i need help again here is the question What region of the United States did the first settlers arrive
96. ### language arts

i agree it is awesome but the ending i was just made
97. ### Social Studies

oh ok i get it
98. ### Social Studies

now is that right reed
99. ### Social Studies

that the expansion of the US throughout the American continents
100. ### Social Studies

is that right reed
1. Pages:
2. 1
3. 2
4. 3
5. Next>>