An equation of the form Ax +By+Cz = D where A, B, and C are not all zero. a. System of two linear equations in two variables
b. System of linear inequalities in two variables c. Linear Equation in three variables
d. System of three linear equations in three variables

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?