Answer:
a. subtract the other summant from the sum, so:
b. divide the product by the other factor, so:
Step-by-step explanation:
We're using equation transformations.
In first case, we're actually subtracting from both sides of the equation.
In second case, we're dividing both sides of the equation by .
12.5
4+21=25
25/2=12.5
120-(30+48)= 42
x=115 y=65
You get 115 for X because angle x is vertical to 115 degrees.
You get 65 because y is supplementary to x, and 180-65=115.
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1250
i hope this helps