Amanda is taking a quiz that consists of five multiple choice questions, each having three answers from which to choose. If she guesses on each question, what's the probability that Amanda will get 100% on the quiz?

Question

Asked 4/21/2014 4:28:03 PM

Updated 4/21/2014 8:09:17 PM

3 Answers/Comments

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Flagged by yeswey [4/21/2014 8:04:37 PM]

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Question

Asked 4/21/2014 4:28:03 PM

Updated 4/21/2014 8:09:17 PM

3 Answers/Comments

This conversation has been flagged as incorrect.

Flagged by yeswey [4/21/2014 8:04:37 PM]

Rating

3

The equation of the line, in general form, that passes through point (-1, -1) and is parallel to the line whose equation is x + y = 3 is: x + y + 2 = 0

Added 4/21/2014 8:04:25 PM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [4/21/2014 8:27:16 PM]

3

The equation of a circle whose center is at the origin and that contains the point (-3, 0) is x^2 + y^2 = 9

Added 4/21/2014 8:07:42 PM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [4/21/2014 8:17:14 PM]

3

(x + 1)(x - 5) = -9

x^2 - 5x + x - 5 = -9

x^2 - 4x + 4 = 0

(x - 2)^2 = 0

x - 2 = 0

If (x + 1)(x - 5) = -9, then the true statements is: x - 2 = 0.

x^2 - 5x + x - 5 = -9

x^2 - 4x + 4 = 0

(x - 2)^2 = 0

x - 2 = 0

If (x + 1)(x - 5) = -9, then the true statements is: x - 2 = 0.

Added 4/21/2014 8:09:17 PM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [4/21/2014 8:17:17 PM]

t Object]User:
x + y = k
x - y = k
The solution to the system shown is _____.
(0, k)
(2, 2)
(k, 0) **Weegy:** Let's use the reduction method
by adding them up, you'll cancel out the y's, leaving you with x=k
Now if x=k, let's replace k by x
x-y=k
x-y=x
x-x=y
0=y
Since x = k and 0 = y, [ we'll say that the solution to this system is (K,0) ] **User:**
3x - 4y = 7
3x + 2y = -5
When the second equation is subtracted from the first, the resulting equation is _____.
-6y = -12
-6y = 12
-2y = -12
2y = 12
**Weegy:** -6y = 12 **User:**
5x + y = 6
5x + 3y = -4
The y-coordinate of the solution to the system shown is ___.
-5
-1
1 **Weegy:** that would be -5 **User:**
Given the system of equations, what is the x-coordinate of the solution?
y = 3 - 1/2x
3x + 4y = 1
22
-17/2
-11 (More)

Question

Updated 4/14/2014 8:42:52 PM

1 Answer/Comment

t Object]User:
A boat makes a 120-mile trip downstream in 3 hours but makes the return trip in 4 hours.
What is the rate of the current?
3 mph
4 mph
5 mph User:
Solve the system algebraically.
3x - 2y - 1 = 0
y = 5x + 4
What is the solution?
{(-9/7,-17/7)}
{(9/7,17/7)}
{(9/7,-17/7)} **Weegy:** Y = 5X + 4
since: 3X - 2Y - 1 = 0
3X - 2(5X + 4) - 1 = 0
3X - 10X - 8 - 1 = 0
-7X - 9 = 0
so: X = - 9/7
Y = 5( - 9/7 ) + 4
Y = - 45/7 + 28/7 = - 17/7 answer is A.{(-9/7,-17/7)} **User:**
2x - y = 5
x + 3y = 7
What is the value of the y-determinant?
7
9
22 **Weegy:** Did you mean the determinant of coefficients?
2 -1
1 3
determinant = 2(3) - (-1)(1) = 6+1=7 source: yahoo **User:**
The system shown has _____ solution(s).
y = 1/2x + 1
2y - x = 2
no
one
infinite
**User:**
Which of the following equations is equivalent to 1/2x - 2/3y = 5?
x - 2y = 30
4x - 3y = 30
3x - 4y = 30 **Weegy:** 3x - 4y = 30 **User:**
2x - y = 5
x + 3y = 7
What is the second row of entries for the system determinant?
0, 3
1, 3
3, 7 **Weegy:** Did you mean the determinant of coefficients?
2 -1
1 3
determinant = 2(3) - (-1)(1) = 6+1=7 source: yahoo **User:**
A boat makes a 120-mile trip downstream in 3 hours but makes the return trip in 4 hours.
If b = the rate of the boat in still water and c = the rate of the current, which of the following equations represents the trip upstream?
3(b - c) = 120
4(b - c) = 120
4(b + c) = 120 **Weegy:** A.3(b - c) = 120 **User:**
In a certain clothing store, 6 shirts and 3 ties cost $79.50, and 3 shirts and 2 ties cost $41.
Determine the cost of each shirt.
$10.00
$11.00
$12.00 **Weegy:** 3s + 5t = 60 ......(1)
2s + 3t = 39 ......(2)
(1)*2 - (2)*3: t = 3, s = (39 - 3t)/2 = 15
Answer: Shirts cost $12 each, and ties cost $3 each. **User:** Solve the system algebraically. Check your work.
5x + 2y = 10
3x + 2y = 6
Make sure there are NO SPACES in your answer. Be sure to include a comma.
**Weegy:** The solution for 5x + 2y = 10, 3x + 2y = 6 is (2, 0) (the value of x is 2 and the value of y is zero) **User:**
In which of the following data sets is the mean equal to the mode?
4, 4, 4, 6, 6
4, 5, 5, 5, 6
3, 3, 4, 6, 7 **Weegy:** 4, 5, 5, 5, 6 is data set where the mean is equal to the mode.
(More)

Question

Expert Answered

Updated 5/21/2014 9:57:28 PM

1 Answer/Comment

Skylar's grades on four math tests are 85, 78, 77, and 69. What does Skylar need to score on the next test in order to have a mean score of 80?
83
90
91 **Weegy:** Skylar needs to get a score of 91 on the next test in order to have a mean score of 80. (More)

Question

Updated 4/15/2014 7:49:14 PM

0 Answers/Comments

What is plagiarism?
**Weegy:** Plagiarism is getting the work of someone else and claim it as your own. It is a big no-no in university life and it could mean expulsion. [
Sometimes people just get to tired to search and discover for themselves that they actually steal someone's idea to save their butts. How hard can it be? considering all the innovation that we have today in terms of researching. It's a big lie when we say that everything that can be discovered already exists.
On the contrary, there are a lot of things that we need to know. The world continuously moves and everything changes. Don't think you can't be caught when you plagiarize. Cheaters never win.
] **User:**
What are the consequences of plagiarism? **Weegy:** The major consequence of plagiarism is that people who engage in it hurt themselves. [ Good research and writing involve a host of skills: for a start, evaluating sources, taking careful notes, selecting appropriate quotations, paraphrasing, and giving credit to others for their ideas and words. Students who plagiarize may never learn these skills, and life in college and beyond can be difficult without them. ] **User:**
Plagiarism damages reputations and relationships.
True
False (More)

Question

Updated 4/22/2014 10:23:00 PM

1 Answer/Comment

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