4. a student is chosen at random from the student body at a given high school. the probability that the student selects math as the favorite subject is 1/4. the probability that the student chosen is a junior is 116/459. if the probability that the student selected is a junior or that the student chooses math as the favorite subject is 47/108, what is the exact probability that the student selected is a junior whose favorite subject is math?

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation:

cant

step-by-step explanation: there is no picture

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).