David drove the first six hours of his journey at 65 km/ hour and the last 3 hours of his journey at 80 km/hour how far is the whole journey in kilometers

How can you decide witch operations to use to slice a two step equation

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1

Calculate the effective quarterly compound interest rate equivalent to a 1% of monthly compound interest rate.