Answer:
Carlos rode further on Sunday by
miles.
Step-by-step explanation:
Carlos covered distance on Saturday 
He covered distance on Sunday = 
Equivalent fractions:

So,
So, He covered more distance on Sunday
Difference between distances =
So, Carlos rode further on Sunday by
miles.
Answer:
When the lines are parallel, there are no solutions, and sometimes the two equations will graph as the same line, in which case we have an infinite number of solutions.
Step-by-step explanation:
Answer:
66 cm
Step-by-step explanation:
Diameter (d) = 21 cm

Answer:
1.B
2. 30 cupcakes
Step-by-step explanation: