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Lelu [443]
4 years ago
10

Edward has to take a seven​-question ​multiple-choice quiz in his sociology class. Each question has four choices for​ answers,

of which only one is correct. Assuming that Edward guesses on all seven ​questions, what is the probability that he will answer ​a) all seven questions​ correctly, ​b) exactly three questions​ correctly, ​c) at least three questions correctly.
Mathematics
1 answer:
vovikov84 [41]4 years ago
8 0

I think the answer is c, at least three questions correctly because he wouldn't get all of them right and he can't a get perfect number, 3.

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Combine the like terms to create an equivalent expression 4n+11−2n
prohojiy [21]

Answer:

2n+11

Step-by-step explanation:

really simple

5 0
3 years ago
Which of the x-values are solutions to both of the following inequalities?
AnnZ [28]

Answer: x=2

Just did it rn

8 0
4 years ago
Vanessa and Zack are playing a game where the player with the lower score wins. At the end of the game, Vanessa has a score of -
Law Incorporation [45]

Answer: Zack won. If you compare the decimal equivalents of their scores, -3.666 < -3.625


Step-by-step explanation:

Given: Vanessa and Zack are playing a game where the player with the lower score wins.

Score of Vanessa=-3\frac{5}{8}=-(\frac{29}{8})=-3.625

Score of Zack = -3\frac{2}{3}=-(\frac{11}{3})=-3.666

We can see -3.666

⇒ Zack has the lower score .

Hence, Zack won. If you compare the decimal equivalents of their scores, -3.666 < -3.625.


4 0
4 years ago
Read 2 more answers
Find the circumference of the circle in terms of π.
SSSSS [86.1K]

Answer:

  • C) 12π cm

Step-by-step explanation:

<u>Circumference formula:</u>

  • C = 2πr

Given r = 6 cm

<u>Circumference is:</u>

  • C = 2π*6 cm = 12π cm

Correct choice is C

4 0
3 years ago
The table shows input and output values of the function y = x2 + 12x – 2. What is an approximate solution of the equation x2 + 1
romanna [79]

Answer:

The solutions for the equations are x = 0.1644 and x = -12.1644

Step-by-step explanation:

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

ax^{2} + bx + c, a\neq0.

This polynomial has roots x_{1}, x_{2} such that ax^{2} + bx + c = a(x - x_{1})*(x - x_{2}), given by the following formulas:

x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}

x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}

\bigtriangleup = b^{2} - 4ac

In this question:

x^{2} + 12x - 2 = 0

So

a = 1, b = 12, c = -2

\bigtriangleup = 12^{2} - 4*1*(-2) = 152

x_{1} = \frac{-12 + \sqrt{152}}{2} = 0.1644

x_{2} = \frac{-12 - \sqrt{152}}{2} = -12.1644

The solutions for the equations are x = 0.1644 and x = -12.1644

5 0
3 years ago
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