Which one of the following is true about perpendicular lines?
a. they intersect at one point
b. they intersect to form an acute angle.
c. they intersect to for an obtuse angle.
d. they never intersect.

Alarger number is double the sum of a smaller number. the larger number is 2 less than 3 times the smaller number. if y represents the larger number and x represents the smaller number, which equations model the situation