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Answer:
18.8 you are right
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given, value of y = 4
To find : Value of x

plug the value of y

Multiply the numbers : 4 and 4

Move 16 to right hand side and change it's sign

Add the numbers : 65 and 16

Divide both sides by 3

Calculate

Hope I helped!
Best regards! :D
So, these are actually pretty simple once you learn the equality used to solve for "x" and when to implement this method. You can use this equality to solve for a segment "x" anytime that two secant lines cutting through a circle come from the same point outside the circle.
Secant: by geometric definition is just a straight line that cuts a curve into multiple pieces.
I did one of them for you hopefully you can use my work for "a" to help you solve for "b".
For a. I got x=7.
2a) 0.50,0.30
2b) monday and friday
2c) 80degrees