Ok I need help yall know it but I don't

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

Find the multiplicative inverse of 8-12i

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?