Part a: solve −np − 70 < 40 for n. show your work. (4 points) part b: solve 4w − 7k = 28 for k. show your work. (6 points)

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?

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

Solve the triangle. a = 21°, c = 105°, c = 5