Marissa gives her friends a clue to the number she was thinking of. She told them that when her number is tripled and added to 9, the result is 48. What is the number she is thinking of? A. 39
B. 13
C. 11
D. 3

i believe the answer is d.

hope it you! : d

9x

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation: