1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Rufina [12.5K]
3 years ago
15

An unprepared student makes random guesses for 6 multiple choice questions that have selections a -

Mathematics
1 answer:
kirill [66]3 years ago
6 0
 <span>P(at least 1 ) = 1 - P(exactly none) = 1 - (4/5)^6 = .738
Hope this helps!!!:)</span>
You might be interested in
HELP ME QUICK PLEASEEEE solve for x: 2/x-2+7/x^2-4=5/x
Anna35 [415]

 

\displaystyle\\\\\frac{2}{x-2}+\frac{7}{x^2-4}=\frac{5}{x}\\\\\frac{^{x+2)}2~~~~~}{x-2}+\frac{7}{(x-2)(x+2)}=\frac{5}{x}\\\\\frac{2(x+2)}{(x-2)(x+2)}+\frac{7}{(x-2)(x+2)}=\frac{5}{x}\\\\\frac{2x+4+7}{x^2-4}=\frac{5}{x}\\\\\frac{2x+11}{x^2-4}=\frac{5}{x}\\\\5(x^2-4)=x(2x+11)\\\\5x^2-20=2x^2+11x\\\\5x^2-2x^2 -11x-20=0


\displaystyle\\3x^2-11x-20=0\\\\x_{1,2}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{11\pm\sqrt{121+4\cdot3\cdot20}}{2\cdot3}=\\\\=\frac{11\pm\sqrt{121+240}}{6}=\frac{11\pm\sqrt{361 }}{6}=\frac{11\pm19}{6}\\\\x_1=\frac{11-19}{6}=\frac{-8}{6}\\\\\boxed{\bf x_1=-\frac{4}{3}}\\\\x_2=\frac{11+19}{6}=\frac{30}{6}\\\\\boxed{\bf x_2=5}




3 0
4 years ago
Please help me!!!!!!! I WILL GIVE BRAINLIEST!!
katen-ka-za [31]
6- 20
8- 30
10- 10
20- 2 Questions?
7 0
3 years ago
11. Find the missing number 1:2 = 3:<br> O A. 2<br> OB. 1<br> OC.3<br> OD. 6
Ilia_Sergeevich [38]
Yh I think the missing number will be 6 because they are equivalent to 1:2
3 0
3 years ago
Read 2 more answers
tony scored 22 and 25 points in the first two games of a basketball tournament. Tony's goal is to make the all-tournament team.
ad-work [718]
Tony's current scores are 22  and 25.
Let x = Tony's next score.

To make the lower required score of 27,
(x + 22 + 25)/3 = 27
x  = 81 - 47 = 34

To make the upper required score of 32,
(x + 22 + 25)/3 = 32
x = 96 - 47 = 49

Answer:
Tony should score between 34 and 49
8 0
3 years ago
Read 2 more answers
How can you use the x and y axis to help you determine unit rate?
leonid [27]

Answer:

x and y can help you show you the constant rate or the unit rate

Step-by-step explanation:

if you use a graph you can see that x mutipley my a certain number gets you y

6 0
3 years ago
Read 2 more answers
Other questions:
  • Mrs. Elenis is going to Europe with her students tonight. She has 12fl.ounce bottle of shampoo and a 10fl.ounce of mouthwash. Th
    12·1 answer
  • Solve the inequality <br> -40 &gt; -10k
    13·1 answer
  • the cafeteria has 2 cases of tuna and 6 single cans of tuna. in all, there are 75 cans of tuna. How many cans of tuna are in a c
    12·2 answers
  • A faucet is leaking at a rate of 4.2 milliliter per minute. How many gallons of water does the faucet leak per day? Use 1 L = 0.
    5·1 answer
  • Simplify.<br> Rewrite the expression in the form z^n.<br> z^7/z^-14
    10·1 answer
  • Fred's Fruit Stand has 252 pounds of fruit and sells 2 7/8 pounds per hour. Gary's grocery Store has 285 pounds of fruit and sel
    10·1 answer
  • Give an example of when an actual net income would result in a negative number.
    13·2 answers
  • Find the area of the polygon.
    15·1 answer
  • Help me with this pls​
    13·1 answer
  • If the poh of vinegar is 9.45, what is its [oh− ]? round to the nearest hundredth. × 10n m n =
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!