Answer:
Step-by-step explanation:
The amount of integers between and inclusive is always .
This means the amount of integers Michael wrote is . Because , which gives , is always non-negative. So, we can kick out the absolute value sign to get .
So, he wrote integers and we're done!
Answer:
.
Step-by-step explanation:
.
Answer:
10 !
Step-by-step explanation:
Answer:
2.67 liters
Step-by-step explanation:
Let "a" represent the number of liters of pure acid needed to make the desired solution. Then the amount of acid in the mix is ...
(100%)x +(10%)(12 -x) = (30%)(12)
(90%)x = 12(20%) . . . . . subtract (10%)(12)
x = 12(2/9) . . . . . divide by 90%
x = 2 2/3 . . . liters
You'll need 2.67 liters of the pure acid.
their relative speed is 95+85=180 kmph.
so 180 km/h = 425 km / x => x= 425/180=85/36