Question

plz answer as fast as possible​

Answer 1

Explanation:

A + B = 5i + 10j + 7k

(A + B) . I = | A+ B| cos o⁰

5 = | A + B| .1

| A + B| = 5

Answer 2

Explanation:

on adding vector A and vector B

remember students that only same components will be added