Answer:
undefined
Step-by-step explanation:
The expression contains a division by
0
The expression is undefined.
Undefined
Answer:
The equivalent expression can be given as:
⇒ 
Step-by-step explanation:
Given expression:
To write an equivalent expression:
Solution:
In order to write an equivalent expression, we will combine the like terms. By like terms, we mean the terms with the same variable constant.
For example : 
and 
are like terms.
We have:
Combining like terms :
⇒ 
⇒
Thus, the equivalent expression can be given as:
⇒
Answer: hope you get some help
Step-by-step explanation:
Answer:
Step-by-step explanation:
The motorist drove at a distance of 90km at a constant speed for the first 40km, and then 20 km/hr faster for the rest of the journey.
The whole journey took him 1hr.
Let S denotes the average speed (in km/hr) for the first 40 km.
Hence we get the following relation,
40/S + (90 - 40)/(S + 20) = 1
or 50/(S + 20) = 1 - 40/S = (S - 40)/S
or (S + 20)(S - 40) = 50S or S^2 - 70S - 800 = 0 or (S - 80)(S + 10) = 0
or S = 80 (km/hr) [Ans]
[S cannot be negative value]
What are you trying to ask here?
