A surveyor wants to measure the length of a portion of the coastline. She begins at one end of the coastline and walks 300 ft away from the water diagonally. She then turns 65° to the right and walks 550 ft back to the water. How long, in ft, is the length
of the portion of coastline she surveyed?

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column

my answer got deleted but it's a

step-by-step explanation:

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.