Answer: 21
Step-by-step explanation:

Substitute the value of z into the expression:

Answer:
Q5) 7
Q6) 4
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Step-by-step explanation:
10.7 if I'm not mistaking
Answer:
$1.25 per hot dog
Step-by-step explanation:
Answer:
The rate is the distance divided by the time.
60 feet in 10 seconds = 60 ft / 10 sec = 6 ft / sec
42 feet in 6 seconds = 42 ft / 6 sec = 7 ft / sec <--- We have a winner!
Step-by-step explanation: