2. a submarine starts out at 135 feet below sea level. it dives 239 feet before rising 307 feet. represent the current depth of the submarine as an integer.

The submarine is at 67 feet below the sea level (-67)

Step-by-step explanation:

* Lets explain how to solve the problem

- The zero level is the sea level

- Any height below the sea level is negative

- Any height above the sea level is positive

- A submarine starts out at 135 feet below the sea level

∴ The submarine is at -135 feet

-  The submarine dives 239 feet before rising

∴ The submarine dives another -239

∴ The submarine is at -135 + -239 = -374 feet

* The submarine is at 374 feet below the sea level

- The submarine rising 307 feet

∴ The submarine dives 307 feet up

- Add the last position to the rising distance

∴ The current depth of the submarine = -374 + 307 = -67 feet

∴ The submarine is at 67 feet below the sea level

a

step-by-step explanation:

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4