Answer:
I’m sorry I don’t know
Step-by-step explanation:
Answer: (a) a = 3, and d=
(b) 
Step-by-step explanation:
Since we have given that
Arithmetic sequence be

As we know that
a denotes the first term.
d denotes the common difference.
So, 
Hence, a = 3, and d=

Hence, (b)

Answer:
Circumference = 42
Area = 147 to the power of 2
Step-by-step explanation:
7x2=14 diameter
3x14=42 circumference
Area = 7x7x3 =147 to the power of 2
Answer:
250 jars
6 hours
Step-by-step explanation:
We know they make 50 jars in an hour, so 50 times 5 is 250 jars in 5 hours. Since 300 is 50 more than 250, and we know 50 times 6 is 300, we can say that we would need 6 hours to make 300 jars.
Issac drove the first three hours at 44 miles per hour.
Step-by-step explanation:
Given,
Average speed of Isaac = 49 mph
Let,
x be the speed during last three hours.
Speed during first three hours = 4x-172
Average = 

Multiplying both sides by 2

Dividing both sides by 5

Speed during last three hours = x = 54 mph
Speed during first three hours = 4x-172 = 4(54)-172 = 216-172 = 44 mph
Issac drove the first three hours at 44 miles per hour.
Keywords: average, division
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