Answer:
8.3
Step-by-step explanation:
Answer:

Step-by-step explanation:
The given vectors are u=7i + 3j and v=-4i + 3j, find 5u-4v in terms of unit vectors i and j.
We substitute the vectors to get:

We perform the scalar multiplication to get:

Group the components;

We simplify to get:

It's 6x = 180 because angle one is 5x and angle two would just be x.
Answer:
x=1
Step-by-step explanation:
55+70=125
sum of angles in a triangle is 180 so
180-125=55
54x+1=55
x=1