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inysia [295]
3 years ago
11

Add : 4d + 1 + d − 2d2 − 1

Mathematics
1 answer:
Sav [38]3 years ago
3 0
Hello : 
<span> 4d + 1 + d − 2d2 − 1 = -2d² +5d</span>
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Does this graph represent a function?Hint: use vertical line test.
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Yes it does just use your pencil or finger and go across it left to right
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3 years ago
Which algebraic expression represents “the class was divided into four equal groups”?
Alex17521 [72]

The last answer, because the class is being divided into four groups. So the class number is not known, thus it is represented by “w” and divided by four.

4 0
3 years ago
find the equation for the line that passes through the point (4,-3), and that is perpendicular to the line with the equation y=
Grace [21]

Answer:

hi

Step-by-step explanation:

Answer

Slope between two given points (1,3) and (2,7) is

m=  

2−1

7−3

​  

=4

Then perpendicular slope is m  

1

​  

=  

4

−1

​  

 

The line equation with this slope is given by

y=  

4

−1

​  

x+c.......(1)

Now, the above line passes through the point (−4,−3)

⇒−3=  

4

−1

​  

×(−4)+c

⇒c=−4

Therefore required line is 4y+x+16=0 (Substitute  

′

c  

′

 in (1) and simplify)

7 0
3 years ago
The amount of rainfall in January in a certain city is normally distributed with a mean of 4.2 inches and a standard deviation o
romanna [79]
Q1 = the exact amount 
5 0
4 years ago
You measure 25 turtles' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 12.8
Firlakuza [10]

Answer:

Margin of error = 4.21 ounces  

Step-by-step explanation:

According to the Question,

  • Given That, You measure 25 turtles' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 12.8 ounces

Therefore, Sample mean = 31 ounces  ,  Sample size(n) = 25 , Alpha(α) = 0.10 & Population standard deviation(σ) = 12.8 ounces

  • Thus, Margin of error  = Z_{critical} × σ / √n  (Z_{critical} at α=.010 is 1.645)

Putting The Values, We get

1.645 × (12.8 / √25 ) ⇒ 4.2112 ≈ 4.21

Thus, the maximum margin of error associated with a 90% confidence interval for the true population mean turtle weight is 4.21 ounces

8 0
3 years ago
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