If y varies inversely as x, and y = 23 when x 8, find y when x 4.
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Answer:
Step-by-step explanation:
Fist let's have a look :
- (AB) is parallel with (CD) and there is a line crossing them both.
Now the first question : What is the size x ?
- We notice that x and 53° are vertically opposite so they are corresponding angles
- so the size of x is 53°
The second question : what is the size of y ?
- We notice that y and 53° are alternate angles
- so they are corresponding angles with same size
- y=53°
The trick is to khow the situation where we have corresponding angles
