Es número c por qué esa es la respuesta
'y' is NOT the number of chairs in each row and column. It's the TOTAL number of
chairs, so it's the product of (chairs in each row) times (chairs in each column).
The problem says that those numbers are equal. So we would expect the TOTAL
to be a perfect square, and the number in each row and each column to be the
square root of the total. Since the total is 81, the number in each row and column
could be either +9 or -9 . Both answers are mathematically correct, but -9
doesn't make sense in the real world. So we know that +9 is the real answer.
Answer:
24
Step-by-step explanation:
4/3=d/18
3d=4*18=72
d=24
Pauline's average speed for this trip is 64 km/hr.
<em><u>Explanation</u></em>
First we will convert each 'minutes' into 'hours' . So......
40 minutes =
and 23 minutes = 
Now, 
So, the distance traveled for first 40 minutes at 88 km/hr speed
,
the distance traveled for next 40 minutes at 75 km/hr speed
and
the distance traveled last 23 minutes at 49 km/hr speed 
So, <u>the total distance traveled </u>
She spends 17 minutes eating lunch and buying gas.
So, <u>the total time taken for the trip</u> 
Thus, Pauline's average speed for this trip = (Total distance / Total time)
<em>(Rounded to the nearest km/hr)</em>
The final stock price is $48.54