I belive your answer is 50
2: 2/3; 3: 3/4; 4: 1/4; 5: 1/3; 6: 1/4; 7: 4/5; 8: 5/6-3/6=1/3
Answer:
The cost for a child is $7 and the cost for an adult is $50
Step-by-step explanation:
Let 'x' represent children
Let 'y' represent adults
The equations used to come to this answer are:
![3x + 2y = 121 \\ 5x + 1y = 85](https://tex.z-dn.net/?f=3x%20%2B%202y%20%3D%20121%20%5C%5C%205x%20%2B%201y%20%3D%2085)
![3x + 2y = 121 \\ 5x( - 2) + 1y( - 2) = 85( - 2) \\ \\ 3x + 2y = 121 \\ - 10x - 2y = - 170 \\ - 7x = - 49](https://tex.z-dn.net/?f=3x%20%2B%202y%20%3D%20121%20%5C%5C%205x%28%20-%202%29%20%2B%201y%28%20-%202%29%20%3D%2085%28%20-%202%29%20%5C%5C%20%20%5C%5C%203x%20%2B%202y%20%3D%20121%20%5C%5C%20%20-%2010x%20-%202y%20%3D%20%20-%20170%20%5C%5C%20%20-%207x%20%3D%20%20-%2049)
Therefore; x = 7
![5x + 1y = 85 \\ 5(7) + y = 85 \\ 35 + y = 85 \\ y = 85 - 35 \\ y = 50](https://tex.z-dn.net/?f=5x%20%2B%201y%20%3D%2085%20%5C%5C%205%287%29%20%2B%20y%20%3D%2085%20%5C%5C%2035%20%2B%20y%20%3D%2085%20%5C%5C%20y%20%3D%2085%20-%2035%20%5C%5C%20y%20%3D%2050)
Answer:
area=38.465, circumference=21.98
Step-by-step explanation:
Divide the diameter by 2 to find the radius
7/2=3.5
Use the formula πr^2 find area
3.5*3.5=12.25
12.25*3.14=38.465
a=38.465
Then, use the formula 2πr to find circumference
2*3.14=6.28
6.28*3.5=21.98
c=21.98