Aboat travels 140 miles downstream in the same amount of time as it travels 92 miles upstream. the speed of the current is 6 mph. what is the speed of the boat in still water?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Given the quadratic function f(x)=3x^2-24x+49 a. use “completing the squares” to convert the quadratic function into vertex form b. state the vertex c. find the x and y intercepts d. graph the function

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?