Please help me and please help me do it in a way i could understand :) ty

Which expression gives the area of the triangle shown below

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Astudent has created the give circuit diagram. it consists of a battery, a resistor, and a light bulb. in one minute, 1.2c of charge flows through the resistor. how much charge flows through the light bulb in one minute?