Solve x2 + 9x + 8 = 0 by completing the square. What are the solutions? {1, 8} {1,-8} {-1,-8}

Which triangles area would be calculated using the trigonometric area formula

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?