alejandra

Most popular questions and responses by alejandra

Marlon has 4 cards, Jake has 4 cards, and Sam has 3 cards. Can you write a multiplication sentence to find how many cards they have in all? Explain

2. chemistry

0.2688 of a monoprotic acid neutralizes 16.4mL 0f 0.08133 M KOH. Calculate the molar mass of the acid in units of g/mol

3. Chemistry

How many grams of bromine are required to react completely with 37.4 grams aluminum chloride?

4. world history

-identify the economic role of the groups -identify the groups place in the social hierarchy -describe challenges faced by the members in the group -describe the potential benefits of belonging to that group the groups are: serfs, nobles, clergy,

5. economics 5

At Western University the historical mean of scholarship examination scores for freshman applications is 900. A historical population standard deviation = 180 is assumed known. Each year, the assistant dean uses a sample of applications to determine

6. physics

eric has a mass of 60 kg. he is standing on a scale in an elevator that is accelerating downward at 1.7m/s^2. what is approximate reading on the scale?

7. I NEED HELP MATH

i have my input output table but i don't know how to complete the sentence inputx / 0/ 1/ 2/ 3/ outputy/ 0/ 1/ 4/ 9/ the question is: does the table represent a function?juatify your answer. ___,because for each____there__ exactly one____. It will be a

8. statistics

The caffeine content of a cup of home-brewed coffee is a normally distributed random variable with a mean of 115 mg with a standard deviation of 20 mg. (a) What is the probability that a randomly chosen cup of home-brewed coffee will have more than 130 mg

9. Science

Consider the following food chain: hawk - rabbit - clover. Each species will contain a different amount of calories in its body (clover: 10 calories, rabbit: 500 and hawk: 1200). Each species has a different daily caloric requirement (clover: sunlight,

10. Science

Consider the following food chain: hawk - rabbit - clover. Each species will contain a different amount of calories in its body (clover: 10 calories, rabbit: 500 and hawk: 1200). Each species has a different daily caloric requirement (clover: sunlight,

11. solution of an equation

can someone please give me an example of a solution of an equation An equation is a statment with the equal sign = in it. If we have y=2x+3 and we're asked to find x when y=7 then we would have to solve 7=2x+3 The solution of that equation is x=2. Was

12. i need help completing this MATH question!

ORDER OF OPERATIONS step 1. first do operations that accur within_____________. step 2. then evaluate_________. step 3. then do_________and_______from left to right. step 4. finally, do______and_______from left to right. here are your choices in

13. physics

A 3.0 kg block is pushed along a horizontal floor by a force F of magnitude 19 N at an angle θ = 30° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25.(a) Calculate the magnitude of the frictional force on the

14. chemistry

the number of protons in the nucleus of an atom is called the.... atomic number

15. CHEMISTRY

A sample of C3H8 has 2.64 x 10^24 atoms. How many carbon atoms does the sample contain? What is the total mass of the sample?

16. Chemistry

A sample of C3H8 has 2.64 x 10^24 atoms. How many carbon atoms does the sample contain? What is the total mass of the sample? I don't even know where to start i mean it seems like a really simple question but the prof hasn't been through this topic. Im

17. math

how many decimeters are there in: a meter: a decameter: a kilometer: 10 100 10000

18. math (comparing ratios)

the question says →4 feet to 4 inches and i have to do it in simplest form

19. Chemistry

How many grams of bromine are required to react completely with 3704 grams aluminum chloride?

20. science

i need help to fill in the blank: if lava has a high content of the mineral__________, it makes a volcano erupt explosively http://www.sciencedaily.com/releases/2003/11/031128083028.htm

21. science i need help

what is the realtionship between the focus and the epicenter? the focus is the depth of an earthquake, the epicenter is the center of the earthquake.

22. can someone please check if im right : math

4(3x+7) is this the equivalent expression : 12x+28 Yes it is, that' using the distributive property. ok. how do i get the opposite of an expression example : -10t+21 The opposite? Do you mean the negative or additive inverse of the expression? If so then

23. thx 4 the help roger

thx 4 the help i got the steps You're welcome and I'm glad you understood the steps. Now use that strategy with your other word problems. Identify what the variable(s) are, convert them to equations, then solve the equations. Always be sure to test your

24. economics 6

Annual per capita consumption of milk is 21.6 gallons (Statistical Abstract of the United States: 2006). Being from the Midwest, you believe milk consumption is higher there and wish to support your opinion. A sample of 16 individuals from the mid western

25. geometry

given triangle ABC is congruent to triangle PQR, AB = 38 .QR = 28 and PQ = 5x+8 . find x value

26. changes in matter

What happens whensodium chloride and silver nitrate react in a replacement reaction?

27. earth science i need help

what is the relationship between the focus and the epicenter of an earthquake? http://www.sciencecourseware.org/VirtualEarthquake/ earths early atmosphere formed during the early archean era. Which gas was generally absent fro mthe atmosphere at this time

28. physics

A 4.53 kg particle has a velocity of vx = 3.98 m/s and vy = −3.16 m/s. Find the magnitude of its total momentum. Answer in units of kg · m/s

29. us history

Why did railroads and the telegraph expand together?

30. Physics

A 4.52 kg block slides down a smooth, fric- tionless plane having an inclination of 31◦ . The acceleration of gravity is 9.8 m/s2 . Find the acceleration of the block. Answer in units of m/s2.

31. chemistry

atoms of the same element with different atomic masses are called isotopes. I don't do these fill in the blank problems without limit. You need to do some work before posting many more. Of give us some indication that you are doing more than just filling

32. active physics

a=change in velocity/time, is this the formula i use for this question: a car takes 5 seconds to speed up from 10 m/s to 60 m/s. what is the acceleration? yes! so what do i do from there? If it goes from 10 to 60, what is it's CHANGE in velocity (speed)?

33. math

i still don't get it im comfused on how many centimeters are there in a decimeter, a meter, and a hectometer 10cm=1dm 100cm=1m 10000cm=1hm There are 100 centimeters in a meter. We know that becase of the prefix centi-. Please re-read DrBob222's post. It

34. Algebra 1

The perimeter of a rectangle is 300 feet the width of the rectangle is 10 feet more than the length what is the width of the rectangle ?

35. algebra

i have a homework problem that i don't know how to do it the question to the problem says: Find the value of expression.identify the property used in each step and the problem is:7(10-1x3)

36. math

lcm is hard for me can you give all the anwers to my homework please

37. physics

explain how you can change the tension of a vibrating string. you can probably change the tension by keeping the rate of the vibration constant and shortening the length of the string.

38. definition for science

the definition for longitude(meridians) The easiest thing to do is to look it up in the dictionary. Go to www.dictionary.com or to www.google.com The definition of coriolis Effect

39. scientific notation

how can i put 10010 into a scientific notation We want the first digit from the left followed by a decimal then some power of 10 Here it's 1.001 x 10^?? How many decimals did we move to the left?

40. MATH

how many milligrams are there in a kilogram I give up alejandra. I showed you how to count your way to the answer and you keep posting. We don't give answers but we try to help you understand so you don't need us. Please go back and count your way from

41. science

whats my height in meters? my height is 5'3" 63 inches x 2.54 cm/inch = 160.0 cm = 1.600 meters You learn to do these by dimensional analysis. We know there are 39.37 inches in 1 meter. First, convert your height to inches so we are dealing with one item

42. Math

How many buses with the school need if only 40 students can ride on each bus

43. algebra

jordan has two numbers that have the sum of 64. those same two numbers have a difference of 42. what are the numbers?

44. social studies

list examples of sumerian literature

45. us history

How important are Edison's inventions in American life today?

ALGEBRA. EQUATIONS FIND N. 3,7,14,15,17,46,N RANGE:43 MODE:N MEDIAN:15 MEAN:N

47. math

Does anyone know how to clear the table on a TI-84 graphic calculator?

48. physics

what are the units of wavelengh They can be any length units, but it is common to use meters for radio waves, centimeters for microwaves, micrometers for infrared, and nanometers or Angstroms (10^-8 cm) for visible and ultraviolet light. Regardless of what

49. physics

what are the 4 main kinds of long-distance communication? I have no idea what you mean here, in physics. Can you explain?

50. active physics

from the question we just did, how much force is neede to stop in 20 seconds! OK. think it through. If it's going at 10 m/s, and then it stops, what is it's change in velocity? is it 10 Yes, now it takes 20 seconds, so what is its acceleration (actually

51. active physics

a 25 mewton force pushes against a 5 kg. mass. what is the acceleration??? what formula do i use?? F=ma

52. PHYSICS HELP

how would you change both the tension and the lenght and keep the pitch the same? oh. i think this question is a bit too vague. what does the apparatus look like? otherwise it seems like you could do whatever you wanted to the string (e.g., attaching a

53. physics

explain how you can change the length of a vibrating string.

54. MATH

i need help filling this out! 4x-10=32-3x 4x-10+____=32-3x+22 ____-10+____=32+_____ ___=___ ___=___ x=___ ok you need to solve for x. remember the rule, whatever you do on the left side, you do to the right side and vice versa. on the second step, they add

55. science

do earthquakes occur in areas without identified large faults? The key words you use are "identified" and "large." As far as I know, earthquakes occur at fault lines, whether or not they have been identified or are large. Since this is not my area of

56. science plz help

do earthquakes correlate with identified large faults? do earthquakes occur in areas without identified large faults? Yes.

57. math

give me an example of a verbal model http://www.google.com/search?hl=en&lr=&as_qdr=all&q=+%22verbal+model%22+example&btnG=Search

58. anyone plz check if its right

(4q+2)-(2q-3) if i simplify it will it be 2q+5? correct You can drop the parentheses and rearrange the terms to get (4q+2)-(2q-3)=4q-2q + 2-(-3)=2q+5 definately correct! i don't think that it is that hard if you drop the brackets you can't doubt it!

59. science math

how many decimeters are there in a decameter Go back to my post and count. Then post your answer here. You can check your answer at google but I will be happy to check it also. 100 decimeters. I'm sure of it! Decimeters

60. math:roger plz check if im right

how many decimeter are there in a meter: .1m a decameter: 10m a kilometer: 1000m Go back to your original post and read what I wrote. Then redo your table.

61. math

4.2 cm=___m 0.042

62. math

how many millimeters are there in: a meter: a decaameter: a kilometer: alejandra don't you have some kind of chart to work from? There should be something in your text telling you how to change prefixes somewhere. thats the problem i don't have one and i

63. math

how many centimeters are there in: a decimeter: a meter: a hectometer: 10 100 10000 10 100 10000

he is missing 3 cents to buy an ice cream bar. she is missing 5 cents to buy the same ice cream bar. they combine their money but they are still 1 cent short. how much is the ice cream bar? Check your last post. Please don't double post.

65. algebra

he is missing 3 cents to buy an ice cream bar. she is missing 5 cents to buy the same ice cream bar. they combine their money but they are still 1 cent short. how much is the ice cream bar? Let x denote how much he has and y denote how much she has. Let p

1. Algebra

I know this is probably old but Incase anybody needs the answer it’s 2^4x

posted on May 31, 2019
2. science help.. pls help me dr.bob22 or damon

It is JJ THOMPSON

posted on February 11, 2019
3. world history

i tried getting answers from my book but i wasnt able to get any BECAUSE I DONT UNDERSTAND ANYTHING im so lost, this is about "medieval christian europe" if thats any help lol

posted on January 2, 2019
4. Math

its yes you just simplify it and both come out with 1/4

posted on November 30, 2017
5. Pre-Algebra

what type of association would you expect betwee a persons age hair length?

posted on September 20, 2016
6. Math

5 units

posted on September 8, 2016
7. Physics

1.The units on both sides of the equals sign, expressed in SI base units, must be the same. 3.Ns (mv=Ft) 4.N.s 5.N/C

posted on October 9, 2014

24

posted on November 8, 2012
9. math

84

posted on February 9, 2012
10. math

12

posted on February 9, 2012
11. geometry

posted on November 1, 2011
12. math

they burried him six feet down and eight feet up

posted on October 20, 2011
13. geometry

If AD is 10 units AB is 8 units AC is 12 is units ED is 4.5 units and if AED is 100 degrees what is the measure of DC

posted on October 6, 2011
14. science

whats a meteorite?

posted on March 1, 2011
15. Algebra

I do not Know

posted on February 1, 2011
16. making dot arrays

I do tooo i don't know what List all of the numbers up to twenty that can be aranged into arrays with two rows??

posted on August 25, 2010
17. Literature

answer to # 3 is novel

posted on November 17, 2009
18. Spanish

SON LA ONCE Y MEDIA DE LA MANANA.

posted on September 30, 2008
19. Sapnish 2

SON

posted on September 30, 2008
20. Spanish

THE MEANING OF ACTRIZ IS TO ACT.

posted on September 30, 2008