Please HELP ME! I WILL ALSO MARK AS BRANLIEST!

One adult ticket is $4.  One child ticket is $7

Step-by-step explanation:

Day 1:

2a + 10c = 78

Day 2:

8a + 5c = 67

2a + 10c = 78

8a + 5c = 67

Multiply Day 2 by 2 so we get the 'c' equal so we can subtract them:

Day 2: 16a + 10c = 134

Day 1: 2a + 10c = 78

Minus Day 2 from Day 1

= 14a = 56

56 / 14 = 4

So A = 4

Now substitute 4 for A in Day 1

2(4) + 10c = 78

8 + 10c = 78

10c = 78 - 8

10c = 70

c = 70 / 10

c = 7

the clubs experimental probibility is 22/80, or 0.275

the diamonds experimental probibility is 24/80, or 0.3

the frequency of hearts is 0.2 of 80, or 16.

that leaves the 18 for the frequency of spades, and the 0.225 for the experimental probibility.