Answer:
There is one 12/4 in 3.
Step-by-step explanation:
12/4 = 3
4/4 + 4/4 + 4/4 = 12/4 = 3
Answer:
x = (c+a)/2
y = (c-a)/2
Step-by-step explanation:
Add the two equations and you get ...
(x +y) +(x -y) = (c) +(a)
2x = c+a
x = (c+a)/2
--
Subtract the second equation from the first and you get ...
(x +y) -(x -y) = (c) -(a)
2y = c-a
y = (c-a)/2
_____
Comment on this problem
This is what I call a "sum and difference" problem. The solution shown here is (obviously) the generic solution to such a problem. Remembering this can get you quickly to the answer any time you're given the sum of two unknowns and their difference.
Answer:
Option B is right.
Step-by-step explanation:
Whenever a system of inequalities is given, normally we will get a collection of points that satisfy all the inequalities in the system
Option B is right
Option A is wrong because a single point cannot be a solution for all inequalities of a system normally an interval would be there
Option C is wrong since a single point if satisfies atleast one cannot be solution for the full system unless it satisfied all inequalities
Option D is wrong because satisfying atleast one inequality is not sufficient but satisfying all inequalities is a must.
