If sin(Θ) = - 5/8 and 180° < θ < 270°, what is the value of cos(θ)?

For the equation below, x is the input and y is the output. y = -4x + 3 if the input is -8, then the output is

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?

Determine if the equation defines y as a function of x: 2xy = 1. yes o no