To find how many seats in the 80th row, you need to figure out the pattern from the 8th row to the 20th row.
To do this, you can create a table showing possibilities from the 8th to the 20th.
I started with 32 at the 8th and added 2 each time. This was only 56 by the 20th.
Then I added 3, and this got me to 68 by the 20th row.
Then you can work backwards to find how many seats in the 1st row. I got 11.
From here you can create an equation that you could use to solve for the 80th row.
11 + 3(r - 1), where r is the number of rows.
Substitute in 80 for r.
11 + 3(80 - 1)
11 + 237
248 seats
There are 248 seats in the 80th row.
<span>-3(1+6r)=14-r
-3 - 18r = 14 - r ...expand by using distributive property
-3 -17r = 14 ...add (r) to both sides
-17r = 17 ...add (3) to both sides
r = -1 ....divide both sides by (-17)</span>
Answer:
3
Step-by-step explanation:
The largest exponent is 3. That is the degree of this polynomial.
The degree is 3.
Answer:
<u><em>7 hours 30 minutes and 0 Seconds</em></u>
Step-by-step explanation:
- <em>60 minutes in 1 hour</em>
- <em>7:30 - 3:00</em>
- <em>60 * 10 = 600 Seconds</em>
- <em>Plus the 30 minutes which converts to 20 seconds</em>
- <em>Change that into hours and minutes</em>
Answer:
12.167
Step-by-step explanation:
