A submarine was at -9 meters. Three times it went down sub 20 meters. Finally, it went up 25 meters. Where is the submarine now? Solve and show work.

-4 meters

Step-by-step explanation:

-9 - 20 meters (went down)

= -29 meters

-29+25 meters (went up)

= -4 meters

Hope this helped!

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

110

step-by-step explanation:

based on the question i am guessing that it is a typo for abc