pandamaknae2003
21.05.2021 •
Mathematics
A spinner with 8 equal sections is labeled 1 through 8. The spinner is spun 4 times. Three out of the 4 times, the arrow lands on 7. The predicted probability of the arrow landing on 7 is 1/8. Which statement BEST explains why the observed frequency is different from the predicted probability. *
The spinner is spun more than 1 time.
The sample size is too small.
The section labeled 7 is bigger than the rest.
The predicted probability is incorrect.
Solved
Show answers
More tips
- H Health and Medicine How to Whiten Teeth and Get the Perfect Smile...
- S Style and Beauty How to Properly Apply Eye Makeup: Tips from a Professional Makeup Artist...
- A Auto and Moto How Can Parking Sensors Help Drivers?...
- C Computers and Internet Make Money Online: Secrets and Essential Ways...
- A Auto and Moto What is the Average Lifespan of an Engine in a Car?...
- H Health and Medicine What You Need to Know About Nasal Congestion in Infants: Causes, Symptoms, and Treatment...
- S Science and Technology Discovering the Anatomy of an LCD TV Screen...
- F Food and Cooking How to Get Reconfirmation of Registration?...
- F Food and Cooking Why Doesn t the Confirmation Link Come to Email?...
- F Food and Cooking Deflope: What is it and how does it work?...
Answers on questions: Mathematics
- M Mathematics Can someone explain ?...
- M Mathematics In a newspaper, it was reported that yearly robberies in Springfield in 2012 was 200, and then went up by 46% in 2013. How many robberies were there in Springfield in 2013?...
- M Mathematics Graph the parabola defined by this equation: y = - 1/2 x ² 2 + x -4....
- M Mathematics Which sentences are punctuated correctly? Select 2 options. Albe Andrew s favorite vegetables are cucumbers, green beans, and red peppers. Darren told me about his travels to...
- M Mathematics How can I test if my son is gay?...
- M Mathematics Following e.g. C, how do you do D? 30 points...
- M Mathematics Answer this and get 50 points!...
- M Mathematics What is the best estimate for 5 A. 3.1209 B. 4.0987. C. 2.2360 D 2.0037...
- M Mathematics 13.7 practice b algebra...
- M Mathematics TanA= 2xy/(x^2+y^2),find sinA...
Ответ:
Since we want to solve for the variable x, we want to isolate x
a²x + (a - 1) = (a + 1)x ⇒ Distribute x to (a+1). Also, remove parentheses
a²x + a - 1 = ax + x ⇒ Subtract a from both sides
a²x - 1 = ax + x - a ⇒ Add 1 to both sides
a²x = ax + x - a + 1 ⇒ Subtract (ax + x) from both sides
a²x - (ax + x)= ax + x - a + 1 - (ax+x) ⇒ Simplify. Remember that multiplying positive by negative = negative
a²x - ax - x = ax + x - a + 1 - ax - x ⇒ Simplify
a²x - ax - x = -a + 1 ⇒ Factor out the x from a²x - ax - x
x(a² - a - 1) = -a + 1 ⇒ Divide both sides by (a² - a - 1)
x = (-a + 1) / (a² - a - 1)
However, we need to make sure that the denominator does not equal 0. Therefore, you set the denominator = 0 (just use the quadratic formula for this), and it gives that the denominator =0 when a = (1+√5)/2 AND (1-√5)/2
Therefore, the final answer is
x = (-a + 1) / (a² - a - 1) given that a ≠ (1+√5)/2, a ≠ (1-√5)/2