Question

7. Bobby buys 10 pounds seafood for $30. It

Answer 1

Answer:

5 pounds of shrimp and 5 pounds of crawfish were purchased in the mixture.                                          

Step-by-step explanation:

We are given the following in the question:

Bobby buys 10 pounds seafood for $30.

Let x pounds of shrimp be purchased and y pounds of crawfish.

Thus, we can write,

$x + y =10$

Cost of shrimp = $5 per pound

Cost of crawfish = $1 per pound

Total money spent = $30

Thus, we can write the equation,

$5x + y = 30$

Solving the two equation by elimination method,

$5x + y-(x+y) = 30-10\\4x = 20\\x = 5\\y = 10 - x = 10 - 5 = 5$

Thus, 5 pounds of shrimp and 5 pounds of crawfish were purchased in the mixture.