A circle has diameter of 14 cm. When the circle forms a square, what is the unit the length of one of its sides

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart