# Algebra

15. A boat travels 30 miles upstream in 4 hours. The trip downstream takes 2.5 hours. Find the rate of the boat in still water.

33. Solve the following: (q + 2)^2 = 25

34. Solve the following: y^2 + 6y + 9 =49

39. How many real roots are there for the equation x^2 + 3x -1?

Thanks
-MC

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1. 15.
You have posted this same question before and it was answered for you.
You should make a log of all the questions and their times you post, and check before posting it again.

33. very simple, take √ of both sides to get
q+2 = ± 5
q = 2 ± 5 or 7 and -3

34. the left side is a perfect square so your equation becomes
(x+3)^2 = 49 and now follow the steps of #33

39. You don't have an equation, it should be
x^2 + 3x - 1 = 0 perhaps ?
If so, evaluate b^2-4ac
= 9-4(1)-1) = 13
so you would have two real roots

Please acknowledge so we know that you actually read these replies.

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2. Thank you for your help!
-MC

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3. welcome

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