Answer:
- Nguyen family's sprinkler: 20 L per hour
- Reed family's sprinkler: 35 L per hour
Step-by-step explanation:
Let n and r represent the output in liters per hour of the Nguyen and Reed family sprinklers, respectively. Then we have ...
15n +25r = 1175 . . . . total sprinkler output
n + r = 55 . . . . . . . . . sum of two output rates
The second equation tells us we can substitute n = 55 -r into the first equation:
15(55 -r) +25r = 1175
10r = 1175 -825 . . . . . . subtract 825
r = 350/10 = 35 . . . . . . divide by 10
n - 55 -35 = 20 . . . . . . find n from r
Nguyen family's sprinkler: 20 L per hour
Reed family's sprinkler: 35 L per hour
If you take 10% of $35 yuo get $3.50, and then add that on and 35 + 3.5 = 38.50 so the original price is $38.5
Answer:
1
1
2
im sure you know what this means
Step-by-step explanation:
Answer:
125
Step-by-step explanation:
250/2=125 this is how many time you would expect to get heads