Owen earned a score of 518 on Exam A that had a mean of 550 and a standard deviation of 40. He is about to take Exam B that has a mean of 55 and a standard
deviation of 5. How well must Owen score on Exam B in order to do equivalently well
as he did on Exam A? Assume that scores on each exam are normally distributed.

cant open file sorry!

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

the correct answer is c

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