A scuba diver to a depth of 50 feet, then rise 15 feet, sinks 12 feet, then rises 20 feet. Write an addition expression to describe this situation. Then determine the sum and explain it's meaning.

1     sepan

2     encuentren

3     tenga

4     hable

5   parezca

6   llegue

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

3.73 * 10^7 is the anser for ttm ur welcome < 3

step-by-step explanation:

  or  

sin y = 7/q

7 is the opposite side length, q is the hypotenuse

tan y = 7/r

7 is the opposite side length, r is the adjacent side length

using sohcahtoa ^^^^

cos y = adjacent/hypotenuse

cos y = r/q