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Zinaida
2 days ago
14

A student is deriving the quadratic formula. Her first two steps are shown. Step 1: –c = ax2 + bx Step 2: -c = a[x^2+b/ax] Which

best explains or justifies Step 2? division property of equality factoring the binomial completing the square subtraction property of equality
Mathematics
2 answers:
Svet_ta [4.2K]2 days ago
6 0

The options presented are:

(1) division property of equality

(2) factoring the binomial

(3) completing the square

(4) subtraction property of equality

Response: (2) factoring the binomial

Step 1: -c = ax^2 + bx

Step 2:-c = a[x^2+\frac{b}{a} x]

In step 2, 'a' is extracted from ax^2 + bx. Upon factoring out 'a', we divide all terms by 'a', resulting in a[x^2+\frac{b}{a} x].

Step 2 involves the binomial factorization process.



Leona [4.1K]2 days ago
6 0

Response:

The answer is B

Detailed explanation:

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A bank manager is interested in the average length of time that customers are willing to wait in line before they give up
tester [3895]

Note. The original question with options given on the bottom

Answer:

F - 1, B - 2, A - 3, D - 4, C - 5, E - 6

Step-by-step explanation:

F. Sample

  • The manager noted 25 customers who left

B. Population  

  • The entire set of customers at the bank

A. Statistic  

  • The mean waiting time for the 25 customers before leaving the bank

D. Parameter  

  • The mean waiting time for all customers prior to exiting the bank

C. Data  

  • The recorded durations for the 25 customers who exited the bank

E. Variable  

  • The duration a customer remains waiting before departing the bank

========================================================

Question

A bank manager is interested in the average length of time that customers are willing to wait in line before they give up and leave the bank. Match the vocabulary word with its corresponding example.

---------------------

1. The 25 customers that the manager observed leave

2. All of the bank's customers

3. The average length of time that the 25 customers waited before leaving the bank

4. The average length of time that all customers will wait before leaving the bank

5. The list of times for the 25 customers who left the bank

6. The length of time a customer waits before leaving the bank

---------------------

  • A. Statistic
  • B. Population
  • C. Data
  • D. Parameter
  • E. Variable
  • F. Sample
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