What the other person said Wo owowowowowo
Answer: u.(v+w) = -20
Step-by-step explanation:
Given;
u = -i+j
v = 10i-2j
w = -8j
v+w = 10i-2j +(-8j)
v+w = 10i-10j
u .(v+w) = (-i+j).(10i-10j)
= -1×10 + 1 ×-10
= -10-10
u.(v+w) = -20
Sixty-two ones is the other
To find the total area of this polygon, you would have to find the areas of the rectangle and two triangles and add them up.
Area of Triangle = 1/2 x base x height
= 1/2 x 16 x 6
= 8 x 6
= 48
And since there are two triangles, we can multiply 48 by 2 to get the areas of both triangles.
Area of Both Triangles = 48 x 2 = 96
Area of Rectangle = base x height
= 16 x 10 = 160
Total Area = 96 + 160 = 256 cm2