Answer:
C
Step-by-step explanation:
look up rules of multiplying radicals.
You can multiply the radicands (the number inside the square root) then take the square root of the new number.
3*21 = 63
Factor 63 into 3*3*7
Pull out 3^2 from inside the square root
leaves you with 3sqrt7 or answer C
Answer:
y – 2 = 4x
3y = –9x – 6
Step-by-step explanation:
Total points scored=72(2)+9
=153
Mean=153/7
=21 6/7
=21.9 (3s.f.)
Answer:
use formula of equilateral triangle = roots 3/4 a square.
