Answer:
d
Step-by-step explanation:
3x+6=21
-6+21= 15
15÷3=5
Answer:
The first and third options are correct so choose both
Step-by-step explanation:
Answer:
from the picture the answer is D.
Step-by-step explanation:

to find x subtract 18x from 4x which will give you -14x=-36
divide both sides by -14
A right triangle must satisfy this equation: a^2 + b^2 = c^2
a= shortest length
b=medium length
c=the longest length
a triangle with sides 4,5,6 will satisfy not this equation because:
4^2 + 5^2 ≠ 6^2
16+25 = 41
41 ≠ 36
so the answer is C.
Hope this helps.
-Jabba