A plane flew outward from Victoria to Calgary, A flying distance of 1260 km. On the return journey ( Calgary to Victoria ), due to a strong headwind, the average flying speed was 90km/hr slower than on the outward journey. The time taken for the return journey was 20 minutes more than for the outward journey. What was the speed of the plane on the return journey?

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.