Let the number of rows be = r
Let the number of seats per row be = s
we know that the number of seats is 126.
So,
..... (1)
As given, there are five more seats per row than the number of rows, so we can say that:
![s=r+5](https://tex.z-dn.net/?f=s%3Dr%2B5)
Putting this in equation (1)
![(r+5)*r=126](https://tex.z-dn.net/?f=%28r%2B5%29%2Ar%3D126)
![r^{2}+5r=126](https://tex.z-dn.net/?f=r%5E%7B2%7D%2B5r%3D126)
![r^{2}+5r-126=0](https://tex.z-dn.net/?f=r%5E%7B2%7D%2B5r-126%3D0)
![r^{2}+14r-9r-126=0](https://tex.z-dn.net/?f=r%5E%7B2%7D%2B14r-9r-126%3D0)
![(r+14)(r-9)=0](https://tex.z-dn.net/?f=%28r%2B14%29%28r-9%29%3D0)
r=-14 and r=9 (neglecting the negative value) we get r=9
And s=r+5
so, s =9+5=14
Hence, there are 5 rows and 14 seats per row.
Answer:
<em>A unit rate is something over a unit of something else.
</em>
<u>Such as:</u> (50 miles) / hour
If you have (150 miles) / 3 hours
This is not a unit rate, therefore you have to divide the top and bottom by 3 to get the unit rate
(150/3 miles) / (3/3 hours)
(50 miles) / hour
Hope this helps :)
Answer:
2.3 feet/ second
Step-by-step explanation:
To find the rate of change, we will have to find the difference in his distance travelled and divide it by the time taken to move that distance.
This is given by rate of change = (change in position)/ change in time
From the question, his position changed from 30 ft to 100 ft thus the distance he travelled is = 100ft - 30 ft = 70 ft.
Time taken to travel this distance = 40 seconds - 10 seconds = 30 seconds
Diver's rate of travel = 70 ft / 30 seconds = 2.33333ft/second.
Rounding off the answer to the nearest tenth, we have 2.3 ft/second
12 is a composite number.
Composite Number-A whole number that can be divided evenly by numbers<span> other than 1 or itself.
Prime Number- </span> A Prime Number<span> can be divided evenly only by 1, or itself. </span>
Answer:
1/2 mile/1/5 hour = 5/2 mph = 2 1/2 mph
Step-by-step explanation: