Answer:21
Step-by-step explanation:
Answer:
-7
Step-by-step explanation:
-3 - (4) = ?
Remove parentheses:
= -3 - 4
Subtract the numbers:
= -7
Answer:
2,-1.5
Step-by-step explanation:
To find the midpoint of a line segment, take the average of the x coordinates and y coordinates of the two points that make it up.

=

=2,-1.5
Answer:
30 m
Step-by-step explanation:
You simply add the lengths of all the sides. 3 m is not needed for this.