An airplane travels 2100 km at a speed of 800 km/hr, and then encounters a tailwind that boosts its speed to 1000 km/hr for the next 1800 km. what was the average speed of the plane for this trip?

Evaluate cos2θ for cosθ = square root of 3/2

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)

The slope of the line whose equation is 3y = 2x - 3 is 2 2/3 3/2