Answer:
482.7972
Step-by-step explanation:
Answer:
74
Step-by-step explanation:
84+84=168
316-168=148
148/2=74
Answer:
n²-7n-21
Explanation:
Given the expression:

First, open the brackets:

Next, bring the like terms together and simplify:

Answer:
68.8
Step-by-step explanation:
delta math
Answer:
52 square units
Step-by-step explanation:
For this you need the length of CB and the length of DA.
|CB| = √(10²+2²) = 2√26
|DA| = √(10²+2²) = 2√26
area of ABC = base · height / 2 = 2√26 · 2√26 / 2 = 52