Let x = times in the pool
Let y = times in the basketball courts
42=3x+5y
x+y=12
Therefore y = 12-x
Subsitute for y
42 = 3x + 5(12-x)
42 = 3x + 60 -5x
Subtract 60
-18 = -2x
9 = x
The person used the pool 9 times.
Both of these values are the same, so the number sentence would state:
7.17 = 7.170
You can place any number of zeros to the very end on the right side (when there is a decimal point) without changing the value of the number.
7.1700000 = 7.17 also
Answer:
Mean = 28.33
Step-by-step explanation:
Comment
You need two inputs. The first is the sum of the numbers and the second is the number of entries in the data.
Givens
Sum = 3 + 32 + 36 + 30 + 33 + 36
Number of entries = 6
Solution
Sum = 170
Mean = sum / number of enteries
Mean = 170 / 6
Mean = 28.33
You have two totals: total # of bills and total amount of $. Using x as #of 20s, and y as # of 50s, you can use the system
x+y=18
20x+50y=450
