5(20-8+3) 5(20-5) 5(15) = 75
The equation would be y=5x+30 x= the months. You multiply 7*5 to see how much things increased, which was by 35. This means that to equal 65 you had to start with 30, so 30 becomes the base price.
It doesn't look correct, but hard to say with the formatting. See the attachment
Answer:
have 50 tickets is adult,30 is child.
Step-by-step explanation:
we can think all 80 tickets is adult
then80*6is 480,then use 480-420 equal 60
after that we use differen price 6-4=2
so 60/2=30 this child ticket
second we can 80-30=50 50is aduli ticket.
got it?
check:
50*6+30*4
=300+120
=480