Find the directional derivative of the function f(x, y)=√x2 +y4 at the point P(−2,3) in the direction of u⃗ = ⟨3,−4 ⟩.

7(x - 2) = 3(x + 4) solve the following equation. then enter your answer in the space provided using mixed number format.

Carlos spent 1 1/4 hours doing his math homework he spent 1/4 of his time practicing his multiplication facts how many hours to carlos been practicing his multiplication facts

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)