Answer:
1) 5 3) A and D 4) 2.5 5) 20
Im sorry I dont know #2
A= <span>π (n + 4) ^2
= </span><span>π (n + 4) (n + 4)
remember order of operations FOIL
= π (n^2 + 4n + 4n + 16)
= </span>π (n^2 + 8n + 16)
A= πn^2 + 8πn + 16<span>π
do the same for B just change the signs
B = </span>πn^2 - 8πn + 16<span>π
subtract the two
(</span>πn^2 + 8πn + 16π) - (πn^2 - 8πn + 16<span>π)
=16</span><span>πn</span>
Answer:
500 miles an hour
Step-by-step explanation:
First off, find out how many sets of 12 minutes are in 1 hour. In other words 60 minutes divided by 12 minutes. The answer would be five. 100/12*5=500/60
The 60 represents the number of minutes. Hope that helps, good luck with homework :)
Answer: 2 and 7/12
Step-by-step explanation: To subtract 4 - 1 and 5/12, first subtract the fractions. Since 4 has no fraction, imagine the fraction 0/12.
Notice however that we can't subtract 0/12 - 5/12.
So, let's rewrite 4 and 0/12 as 3 + 1 and 0/12 or 3 + 12/12 by changing 1 and 0/12 into an improper fraction.
Now we have 3 and 12/12 - 1 and 5/12.
Now we can subtract our fractions 12/12 - 5/12 and we get 7/12. Next we subtract our whole numbers 4 - 1 to get 3.
So 5 - 1 and 5/12 is 2 and 7/12.
Answer:
b = 86
Step-by-step explanation:
49 + b + 45 = 180 Combine like terms
b + 94 = 180 Subtract 94 from both sides to isolate b
b = 86
I hope this helped and please mark me as brainliest!