Answer:
bc=-4
Step-by-step explanation:
4x -1 is -4. because your adding a negative and a positive
Answer:
43%
Step-by-step explanation:
we know that
in the right triangle of the figure
Applying the Pythagorean Theorem

therefore
the answer is the option
C) 
Answer:
should be 192
Step-by-step explanation:
The handshake problem!
Each of the five will play against 4 others, but since A vs B can be considered the same game as B vs A, so there are 5*4/2=10 matches.