Answer:
18
Step-by-step explanation:
Intersecting Secants Theorem:
6(x + 6) = 8(8 + 10)
6x + 36 = 8(18)
6x + 36 = 144
6x = 144 - 36
6x = 108
x = 18
Answer:
Third graph is the correct choice. See below.
Step-by-step explanation:
See the attachment below.
Best Regards!
Answer:
It's B
Step-by-step explanation:
Step-by-step explanation:
Area of triangle = 0.5(4)(8) = 16cm² (D).
I assume you know about the dot product, and that for two vectors
and
, the angle between them
satisfies

Then the vectors are parallel if the angle between them is 0 or 180 degrees (0 or pi radians), which would make
or
, respectively.
Part A)



Then the angle between
is such that

so these vectors are parallel ("antiparallel", more specifically, which means they are parallel but point in opposite directions).
Part B) involves the same computations:

has the same components but differing by sign and order, as
; its magnitude remains the same, though:



which is neither 0 nor pi, which means these vectors are not parallel.