Which letter has at least one line of symmetry?
a. p
b. r
c. q
d. t
it's for a question on my chapter 18:

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

Af jewelry box is in the shape of a rectangular prism with an area of 528 cube inches. the length of the box is 12 inches and the height is 5 1/2 inches. what is the width of the jewelry box