Answer:
11
/20
Step-by-step explanation:
Step 1- We can't subtract two fractions with different denominators. So you need to get a common denominator.
So we multiply 3 by 10, and get 30.
Then we multiply 2 by 4, and get 8.
Next we give both terms new denominators -- 4 × 10 = 40.
So now our fractions look like this:
30
/40
−8/40
Step 2- Since our denominators match, we can subtract the numerators.
30 − 8 = 22
So the answer is:
22
/40
Step 3-
Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction? Yes we can!
11
/20 is the answer
The answer is <span>The liquid must be in the cooler fewer than 10 minutes.
</span>
Let:
m - the number of minutes the liquid is in the cooler.
a - the starting temperature
The function is:
f(m) = a - 3 * m (Since the temperature decreases by 3°F each minute m, it has a negative sign)
Let:
m - <span>the number of minutes the liquid is in the cooler.
a - the starting temperature
</span>a = 90<span>°F
</span>
<span>The temperature of a liquid must stay above 60°F:
f(m) > 60
Thus:
</span>f(m) = a - 3 * m
f(m) > 60
a - 3 * m > 60
90 - 3m > 60
90 - 60 > 3m
30 > 3 m
30/3 > m
10 > m
Or m < 10. So the correct answer is The liquid must be in the cooler fewer than 10 minutes.
Answer:
1500km
Step-by-step explanation:
1cm=100km
15•100=1500km
