The first one
give mrainliest pls xo
Answer:

Step-by-step explanation:
The general equation for a circle is

Where a and b are the x and y values of the centre. So comparing to your equation you can see that a is 2/3 and b is 0
Answer:
Right
Step-by-step explanation:
360/4 = 90
90° is a right angle

originally. Then you reduces the side lengths a so it will be

Just note that 40% is the same as 2/5.<span />
Answer:
8x = 4x+30
x=7.5
Hope this helps!! Have a good day and remember to be tiger fierce!! :)