Tina sells lampshades for $7 each and paper lanterns for $4 each at a one-day craft fair. she sells k lampshades and (k + 4) paper lanterns. the expression 7k + 4(k + 4) represents tina’s total sales.
select all the equivalent expressions for tina’s total sales at the fair.
a 8k+16 b 11k+4
» 11k+16 d 7k+4k+4
» 7k+4k+16. how is it equivalent?

Find the balance at the end of 4 years if 1000 is deposited at the rate of

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3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.