First you should add all the sides of the pillows then multiply it by 3.
To solve for x, simply rearrange the problem:

Implicit defferentation
remember that dy/dx y= dy/dx
so
take derivitive of both sides

solve for

minus 2x both sides

divide both sides by 2y


when is the slope equal to

solve for





find where the circle and this line intersects
substitute

for y




times both sides by


sqrt both sides, take positive and negative roots
x=+/-10
sub back




the points are (10,-24) and (-10,24)
Answer
c
Step-by-step explanation:
Answer:
Graph A
Step-by-step explanation: