Answer: it would result into a negative number since they are both negative, however if you imply real math rules it would result in positive five since the signs change when a negative and a negative becomes a positive
Step-by-step explanation:
The answer
the only method for finding the answer is computing directly the value of O(20) by replacing n by 20,
since we know that <span>O(n) = 2n - 1
so, we get </span>O(20) = 2*20 - 1 = 40-1=39
the answer is <span>D. 19</span>
Answer:
option . D
Step-by-step explanation:
The reason for this is because it is turned around which is able to be turned around and have the same answer in the end.
Here are the steps to solving:
1) Write out problem 3.6+7.2k <25.2
2) Subtract 3.6 7.2k <21.6
3) Divide by 7.2 k <3
So k<3 would be your answer
Answer:
25km/hr (take the word train as bus )
Step-by-step explanation:
Answer
Let x km/hr be the constant speed of the train,
Then Time taken to cover 300km=
x
300
hrs
Time taken to cover 300km when the speed is increased by 5km/hr=
x+5
300
hours
It is given that the time to cover 300km is reduced by 2 hours
∴
x
300
−
x+5
300
=2
⇒
x(x+5)
300(x+5)−300x
=2⇒2x
2
+10x=1500
⇒x
2
+5x−750=0⇒x
2
+30x−25x−750=0
⇒(x+30)(x−25)=0⇒x=25orx=−30
But x cannot be negative. Therefore x=25
Hence, the original speed of the train is 25km/hr