In ΔNOP, the measure of ∠P=90°, the measure of ∠O=17°, and OP = 8.6 feet. Find the length of PN to the nearest tenth of a foot.

5x + 2 = 12 solve the following equation. then place the correct number in the box provided.

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?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?