Use a sum or difference formula to find the exact value of the following.
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Answer:
See the graph of the given linear equation shown below.
Explanation:
Given the linear equation : x+y = -2
We make a table for values of x and y;
x y = -2-x
0 -2
-2 0
1 -3
Now, plot these three points (0, -2) , (-2, 0) and (1, -3) on the coordinate plane.
You can see the graph as shown below.
A decrease in the ratio 4:5 implies that :
New quantity:Old quantity = 4:5
Let the new quantity be
So, the new quantity is 32