Starting at sea level, a submarine descended at a constant rate to a depth of 3/4 mile relative to sea level in 4 minutes. What was the submarine's depth relative to sea level after the first minute?

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

If a is a nonzero real number then the reciprocal of a is

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.