V= -8i+15j find magnitude of v

17

Step-by-step explanation:

The sum of squares of the coordinates is (−8)²+(15)²= 289.

Therefore, the magnitude ∥v⃗ ∥ =√289= 17

vector magnitude is ∥v⃗ ∥= 17.

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

a. she will receive a refund of $278.

step-by-step explanation: