Question and answer
Evaluate the following expression if r = -7 and t = 4. r2 + t =
If r = -7 and t = 4, r^2 + t = 53 (-7)^2 + 4 = 49 + 4 = 53
Question
Asked 6/17/2009 10:12:15 AM
Updated 6/12/2014 6:52:45 PM
1 Answer/Comment
f
Get an answer
New answers
Rating
8
If r = -7 and t = 4, r^2 + t = 53

(-7)^2 + 4 = 49 + 4 = 53
Added 6/12/2014 6:52:45 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [6/13/2014 2:04:35 AM]
Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
A major factor in the use of the inclined plane is
Weegy: less force needed (More)
Question
Expert Answered
Updated 146 days ago|9/29/2023 2:15:37 PM
1 Answer/Comment
A major factor in the use of the inclined plane is friction.

Added 146 days ago|9/29/2023 2:15:37 PM
This answer has been confirmed as correct and helpful.
A major factor in the use of the inclined plane is
Weegy: less force is need when some thing is needed to bring down. (More)
Question
Expert Answered
Updated 10/6/2017 12:29:24 PM
1 Answer/Comment
A major factor in the use of the inclined plane is friction.
Added 10/6/2017 12:29:22 PM
This answer has been confirmed as correct and helpful.
Evaluate the following expression if p = -2 and q = 5. p2q2=
Weegy: (More)
Question
Expert Answered
Updated 7/30/2014 9:14:39 PM
1 Answer/Comment
p^2q^2 if p = -2 and q = 5;

(-2)^2 * (5)^2

= 4 * 25

= 100
Added 7/30/2014 9:14:39 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [7/30/2014 9:17:35 PM]
For the data below, find the mode. 10 11 11 13 15 25 30 60
Question
Updated 8/15/2014 7:20:29 AM
3 Answers/Comments
Mode is number repeated the most so answer is 11.
Added 6/10/2009 6:32:01 PM
The mode is 11 as it is repeated more number of times.
Added 6/10/2009 8:53:23 PM
The mode of this set : 10 11 11 13 15 25 30 60 is 11.
Added 8/15/2014 7:20:29 AM
This answer has been confirmed as correct and helpful.
In a pulley system, a 5-newton weight is to be lifted 2 meters. The rope is pulled 10 meters. The effort force is two newtons. IMA = AMA = efficiency = % .
Weegy: IMA is a multiplier. Meaning it represents how much the machine will multiply the force which is put into it. It, therefore, has no unit and would be written like: 3. [ [ [ This means that whatever amount of work is put into the machine, you will get 3 times the work out. Effort will usually be a distance: cm, m Resistance will also usually be a distance although it needs to be the same unit as the effort so we compare apples to apples. :) ] ] ] User: In a pulley system, a 5-newton weight is to be lifted 2 meters. The rope is pulled 10 meters. The effort force is two newtons. IMA = AMA = efficiency = % (More)
Question
Expert Answered
Updated 237 days ago|6/30/2023 10:51:28 AM
1 Answer/Comment

To calculate the IMA (Ideal Mechanical Advantage) of a pulley system, we can use the formula:

IMA = (Distance the effort force moves) / (Distance the load moves)

In this case, the distance the effort force moves is 10 meters (as mentioned in the question), and the distance the load moves is 2 meters. Therefore, the IMA can be calculated as:

IMA = 10 / 2 = 5

The IMA represents the theoretical advantage of the pulley system.

The AMA (Actual Mechanical Advantage) of a pulley system takes into account factors such as friction and other losses. In an ideal pulley system without any losses, the AMA would be equal to the IMA. So, in this case, the AMA is also 5.

Efficiency is defined as the ratio of output work to input work, expressed as a percentage. In a pulley system, the output work is the work done on the load (weight lifted), and the input work is the work done by the effort force. Since the effort force is two newtons and the load is five newtons, the efficiency can be calculated as:

Efficiency = (Output work / Input work) * 100
= (5 / 2) * 100
= 250%

Therefore, the efficiency of the pulley system is 250%.
Added 237 days ago|6/30/2023 10:51:28 AM
This answer has been confirmed as correct and helpful.
38,897,774
questions answered
Popular Conversations
Can seeds grow into gymnosperms and mosses
Weegy: Mosses are Bryophytes. User: what are angiosperms Weegy: Mosses are bryophytes. User: what are ferns ...
2/12/2024 5:22:02 PM| 8 Answers
what is one of the best ways to detemine what kind of
Weegy: Please post complete questions so we can answer them. Thanks!
2/12/2024 3:41:48 PM| 3 Answers
Digital piracy is also known as
Weegy:
2/12/2024 11:16:06 PM| 3 Answers
What does PCT mean in basketball
2/14/2024 8:06:12 PM| 3 Answers
Who constructed railroads?
Weegy: Constructed railroads were made by Private investors. User: What was the spoils system? Weegy: Spoil system ...
2/15/2024 5:22:13 AM| 3 Answers
In The Proposal, after Stepan brings Ivan back into the house, what's ...
Weegy: The second thing that Ivan and Natalya fight about in "The Proposal" is: Their dogs. User: In The Proposal, as ...
2/16/2024 4:07:05 PM| 3 Answers
GET
Answers.
GET THE APP.
weegy*
*
Get answers from Weegy and a team of really smart live experts.
S
L
P
Points 1355 [Total 3084] Ratings 1 Comments 1345 Invitations 0 Offline
S
L
Points 927 [Total 2625] Ratings 0 Comments 927 Invitations 0 Offline
S
L
Points 660 [Total 660] Ratings 0 Comments 0 Invitations 66 Offline
S
L
Points 500 [Total 1311] Ratings 1 Comments 490 Invitations 0 Offline
S
L
Points 494 [Total 494] Ratings 7 Comments 424 Invitations 0 Offline
S
L
L
Points 96 [Total 6743] Ratings 2 Comments 76 Invitations 0 Offline
S
L
1
1
1
1
Points 70 [Total 2225] Ratings 7 Comments 0 Invitations 0 Online
S
L
Points 34 [Total 3448] Ratings 1 Comments 24 Invitations 0 Offline
S
L
R
R
L
Points 11 [Total 6099] Ratings 0 Comments 11 Invitations 0 Offline
S
Points 10 [Total 10] Ratings 1 Comments 0 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.