First off, you misspelled some words, second WHICH BUCKET does josh's brother take? That's important!
Answer:
Step-by-step explanation:
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The next score is 90 because 85+91+92+92=360/4= 90 average.
Answer:
1. y = sin(x²+C)
2. see below
Step-by-step explanation:
1. 
separation of variables

integration both sides
you should get :
remember constant of integration!!
2. y = sin(x²+C)
3 = sin(0+C)
y(0) = 3 does not have a solution because our sin graph is not shifted vertically or multiplied by a factor whose absolute value is greater than 1, so our range is [-1,1] and 3 is not part of this range