Answer:
450 students
Step-by-step explanation:
Let s = number of students
1/2 are Americans 1/2s are Americans
s -1/2s = number of students left
1/2 s = number of students left
1/3 of the students left are Europeans
1/3 (1/2s) = 1/6s are Europeans
The rest are Australians = 150
Students = Americans + Europeans + Australians
s = 1/2s + 1/6s + 150
Combine like terms
s = 1/2*3/3 *s + 1/6s +150
s = 3/6s + 1/6s +150
s = 4/6s + 150
Subtract 4/6s from each side
s -4/6s = 150
6/6s - 4/6s = 150
2/6s = 150
1/3s = 150
Multiply each side by 3
3* 1/3s = 150*3
s = 450
There are 450 students
I don’t think you posted a picture along with this so I can’t answer
Answer:
Step-by-step explanation:
Cost of 1 CD's 
Cost of 1 Hat 
Cost of 1 flying disk 
Number of CD's = 11
Number of hats = 26
Number of flying disks = 53
Station's cost for the promotional items is calculated as follows: ![\left[\begin{array}{ccc}4.50&3.25&1.25\end{array}\right] \left[\begin{array}{ccc}11\\26\\53\end{array}\right]=4.50(11)+3.25(26)+1.25(53)\\\\=49.5+84.5+66.25\\\\=\$200.25](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D4.50%263.25%261.25%5Cend%7Barray%7D%5Cright%5D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D11%5C%5C26%5C%5C53%5Cend%7Barray%7D%5Cright%5D%3D4.50%2811%29%2B3.25%2826%29%2B1.25%2853%29%5C%5C%5C%5C%3D49.5%2B84.5%2B66.25%5C%5C%5C%5C%3D%5C%24200.25)
