Answer:
23 degrees
Step-by-step explanation:
6x + 42 = 180
x = 23
Answer
Find out the what fraction of the sandcastle did they build together .
To prove
Let us assume that the fraction of the sandcastle they build together be x .
As given


Than the equation becomes

L.C .M of (3,7) = 21
solving


Therefore the fraction of the sandcastle did they build together be

Hence proved
Answer: C
Step-by-step explanation:
Supplementary angles add up to 180
x + 83 = 180
x= 97