How do I do this as I need help but don’t know how to solve it ??

14 tickets weren't sold.

Step-by-step explanation:

14 times 15 = 210

So there are 210 seats in the cinema.

The total is $1274 so you would divide

which equals 196

Your final step is to subtract

210 (the total seats) minis 196 (seats sold) equals 14 seats not sold

HOPE THIS HELPED

Solve 4x-3y=-9 for y. It would be y=4/3x+3. Then, since the slope is 4/3 the slope for the parallel line would also be 4/3 because they are parallel to each other. Now plug in the points (6,5) into the standard form: y=mx+b. We know y=5, x=6, and m=4/3. It would be 5=4/3(6)+b. Now solve for b which would be -3. Therefore the equation is: y=4/3x-3.
Hope that helped!