Answer:
Originally there were 30, 25 cents stamps and 20, 15 cent stamps.
Step-by-step explanation:
We are given the following in the question;
Let x be the number of 25 cents stamps and y be the number of 15 cents stamps.
Marci has a total 50 stamps.
Thus, we can write

Also,

Total cost = $16.50
Thus, we can write the equation:

Solving the two equations:

Originally,

Thus, originally there were 30, 25 cents stamps and 20, 15 cent stamps.
Answer: 
Step-by-step explanation:
If it's described as my drawing:
The distance of downstream will be 375 * tan25 = 174.87 feet
4 + 3 + 2 = 9
18/9 = 2
3 x 2 = 6
Answer = 6
Answer:
11 + y > - 33
Step-by-step explanation:
To represent the expression :
Sum of 11 and y ; greater than - 33
Sum of 11 and y ; 11 + y
Greater Than - 33; > - 33
Hence ;
11 + y > - 33