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## Debbie D.

### San Diego, CA (92129)

 Travel radius 10 miles Hourly fee \$55.00 Save up to 15%
 Background check passed 06/21/2013 Usually responds in about 42 minutes You don't pay for tutoring unless you find a good fit! You don't pay for tutoring unless you find a good fit!

# Debbie's Resources

Hi Zak, Without a diagram, I am assuming "B" is the angle that the ladder makes with the ground, and "x" is the distance from the base of the ladder to the building. cos B = x/30 = .2 so x = 30*.2 = 6 The height of the building is extraneous information, because we know that a 30...

Hi Mary, Remember the Pythagorean identity, sin^2(x) + cos^2(x) = 1.  If you use this to replace sin^2 with an expression containing cos^2, you can factor the expression.  So you had sin^2 (x) + 2 cos (x) - 2 = 0  and you know by the pythagorean identity that sin^2 (x) = 1 - cos^2 (x),...

# What's f(x, -x^2, x^2)? (answer)

Hi Sun, F(x, y, z) is called function notation, it is really just a substitution problem.  It tells you what to substitute for x, y, and z.  In your problem, f (x, -x^2, x^2) means x does not change, y is replaced with -x^2, and z is replaced with x^2. So substitute:  ( (x^2)^2 + x^2 - (-x^2)...

### Debbie's Hourly Rate

Hourly Fee: \$55.00

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### Background Check Status for Debbie D.

Debbie D. passed a background check on 06/21/2013. The check was ordered by another user through First Advantage. For more information, please review the background check information page.

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