The expression - 280 + 15x represents a submarine that began at a depth of 280 feet below sea level and ascended at a rate of 15 feet per minute. What was the depth of the submarine after 7 minutes?
Select the correct answer below and, if necessary, fill in the answer box to complete your choice.
A. The submarine was
s feet below sea level after 7 minutes.
OB. The submarine will have reached sea level after 7 minutes.

fyuh

step-by-step explanation:

gvfvhv

i can answer this if i have the answer choices

perimeter = 10 +  √10  units

explanation:

first, we will need to get the length of each line using the distance formula which is as follows:

distance = 

1- length of ab:

ab =   = 5 units

2- length of ac

length of ac is the same as ab = 5 units

3- length of bc:

bc =   =  √10  units

now, we can get the perimeter by adding the side lengths as follows:

perimeter = 5 + 5 +  √10

perimeter = 10 +  √10  units

hope this : )

read more on -