Can someone please help me ?

There was 443 student tickets sold

Step-by-step explanation:

Step 1:  Make a system of equation

4s + 6n = 4310

s + n = 866

Step 2:  Solve for s to get n

s = 866 - n

4(866 - n) + 6n = 4310

3464 - 4n + 6n - 3464 = 4310 - 3464

2n / 2 = 846 / 2

n = 423

Step 3:  866 - 423 gives us the amount of tickets bought by students

s = 866 - 423

s = 443

 There was 443 student tickets sold

option: d is correct

step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).