Kathy walked from main street to fairfax road. it took her 1 hour 30 minutes to walk from main street to dexter lane. it took her 25 minutes to walk from dexter lane to fairfax road. she arrived at fairfax road at 4: 00 pm. what time did she leave main street?

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

Simplify (4x^2 - 8xy + 2y^2) - (9x^2 - 4xy - 7y^2) a. -5x^2 + 4xy + 9y^2 b. -5x^2 - 4xy + 9y^2 c. -5x^2 + 12xy + 4y^2 d. -5x^2 - 4xy - 5y^2