What is the pre-image of vertex a' if the image shown on the graph was created by a reflection across the y-axis?

a.(–8, –6)
b.(–6, 8)
c.(8, 6)
d.(6, –8)

The area of a 25-inch tv screen is 300 square inches. the area of a 40-inch tv screen is 768 square inches. the are of the smaller screen is what percent of the area of the larger screen?

What is (28 + 7 + 6 + 3) x 1/2 show your work

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).