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Mamont248 [21]
3 years ago
8

Cheryl writes 7 fewer posts than Kevin on a social media site. Answer the questions to write an algebraic expression. Then evalu

ate the expression for the given value, 1. Choose a variable to represent the number of posts Kevin writes. Explain why you chose this variable. 2. Which operation ( addition, subtraction, multiplication, or division ) applies to this situation? Justify your choice. 3. Use your variable and the operation you identified to write an expression for the number of post Cheryl wrote. 4. If Kevin wrote 21 post, how many did Cheryl write.​
Mathematics
1 answer:
Inessa [10]3 years ago
8 0

Answer:

17

Step-by-step explanation:

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Answer:

The best conclusion is that we are 90% that the true population proportion of Republicans that voted for Mitt Romney is between 0.7273 and 0.8106.

Step-by-step explanation:

x% confidence interval:

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In this question:

The 90% confidence interval for the proportion of Republican voters that had voted for Mitt Romney is (0.7273, 0.8106). The best conclusion is that we are 90% that the true population proportion of Republicans that voted for Mitt Romney is between 0.7273 and 0.8106.

7 0
3 years ago
Jane is studying the rate at which the sale of a particular brand of chocolate has increased over the years. The graph below sho
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The y-intercept, in this case, represents when x is at 0, or when she just began observing.
6 0
4 years ago
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What is the graph of the function f(x) = -x^2+x+20/x+4
mr_godi [17]
F(x) = (-x²+x+20) / (x+4)

-x²+x+20     | x+4
+x²+4x          -x+5
 \\\\ 5x+20
     -5x-20
      \\\\\\\\\
 
 f(x) = (x+4)(-x+5) / (x+4)
 
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The graph is a decreasing line, with origin from 5.



   

3 0
3 years ago
Rob Polanski is a tractor salesman. Last week his total sales amounted to $38,642.00, and he received $2,704.94 in commission. W
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2704.94 / 38642 = 0.07 = 7%
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Answer:

200

Step-by-step explanation:

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