Answer:
21
Step-by-step explanation:
I used a triangle area calculator.
Hope I helped!
Answer:
x =2 
Step-by-step explanation:
a2+b2=c2
(10*10)+(8*8)=x
Answer:
18°
Step-by-step explanation:
The law of cosines tells you ...
a² = b² + c² -2bc·cos(A)
Solve for cos(A) and fill in the numbers. Note that the value of cos(A) is very close to 1, so the angle will be fairly small. This by itself can steer you to the correct answer.
cos(A) = (b² +c² -a²)/(2bc) = (49 +100 -16)/(2·7·10) = 133/140
A = arccos(133/140) ≈ 18.2° ≈ 18°
Both graphs have the same slope, that is the same, but the thing that is different is he second equation starts at a y-int of -7, versus the first starting at 0.
