Which of the following methods would be the easiest to use to solve x2 – 7 = 0?

The circumference of a circle is 5 pi cm. what is the area of the circle?

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)