Please help i'll mark big brain

Question 13 of 451 pointwhich statement correctly describes the inverse of the following function? a. it is negative.b. it is a horizontal shift.c. it is not a function.d. it is a function. give an explanation as to why you chose that answer. (i think its either a or d.)

What is the lcm of 16 and 40 ? 24 and 40 ?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5