Answer:
the first option
Step-by-step explanation:
Given
Ax + By = C ( subtract By from both sides )
Ax = C - By ( divide both sides by A )
x = 
Well, 10x4=40 because 10+10+10+10=40 and that means your answer must be 40 ones or you asked something else.
Answer:
50%
Step-by-step explanation:
8+3+4=15
15/3=5
5x10=50
Answer:
66 cm
Step-by-step explanation:
Diameter (d) = 21 cm
