Need some help please :)

Simone claims the initial value and y-intercept are the same thing on a graph. Is she correct?

The average of 5 distinct scores has the same value as the median of the 5 scores. the sum of the 5 scores is 420. what is the sum of the 4 scores that are not the median? * explain how you found the answer * a) 315 b) 320 c) 336 d) 350 e) 360

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers