Answer:
60 :)
Step-by-step explanation:
The middle two numbers are 59 and 61 so you add them together and divide by 2.
Answer:
The unit rate is accurately 
(km/minute)
Step-by-step explanation:
(1,1/4) means that the vehicle traveled 1/4 km within 1 minute.
The unit rate for this problem is also known as the speed of the vehicle.
So to find the speed, you need to use distance over time.
---> Unit rate: 
/ 1 = (km/minute)
(2,1/2) means that the vehicle traveled 1/2 km within 2 minutes.
Same process:
---> Unit rate: 
/ 2 =
Because of this, the unit rate is accurately (km/minute)
40,075 kilometers?
If you're going for a very rough estimate without knowing that the circumference is 40,075, I'd say to go for 40,000 but I'm not really sure what you're asking.
Answer:
3
Step-by-step explanation:
4) -1/2(y-x)
Multiply -1/2 to y and x
-1/2y+ 1/2x
5) a(8+2b-6)
Multiply a to the equation in parentheses
8a+2ab-6a
Add like terms which are 8a and -6a
2ab+2a
6) -2.5(-3+4n+8)
Multiply-2.5 to the equation in the parentheses
7.5-10n-20
Add like terms which are 7.5 and -20
-10n-12.5
