When the sum of a number and 4 is subtracted from 16 the result is 8
1 answer:
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Answer:
Step-by-step explanation:
Given:
The area 'A' of a circle with radius equal to 'r' is given as:
In order to rewrite the given formula in terms of radius 'r', we need to isolate 'r'.
Dividing both sides by π, we get:
As , the above equation becomes:
Taking square root both the sides, we get:
We neglect the negative result while taking square root as the radius can't be a negative number.
Thus, the formula for radius 'r' in terms of area 'A' is given as:
Answer:
Step-by-step explanation:
--- 1
--- 2
---3
-1 times the second equation =
= --4
Now we are given that replace the third equation by the sum of itself and -1 times the second equation
So, New third equation =
=
Hence the new third equation is