In which triangle do the three altitudes intersect outside the triangle?

The graph of a line gets what as the value of the slope gets bigger

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

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?