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(4x-7y)(4x+7y)
4x times 4x= 16x^2
-7y times 7y= -49y^2
Let x represent the scores. With mean and standard deviation given,
The Empirical rule states that
1) About 68% of the x values lie between 1 standard deviation below and above the mean
2) About 95% of the x values lie between 2 standard deviation below and above the mean
3) About 99.7% of the x values lie between 3 standard deviation below and above the mean
If we consider this rule, then the percentage of scores that fall within 3 standard deviation (-3 to +3) is 99% because this is closer to 99.7%
Answer:
1. 
2. 
3. 
4. 
Step-by-step explanation:
Answer:
The first table because the y side is increasing at the same rate . the rate is 4