Question

Rick bought some tetra fish and goldfish for his fish tank. He bought twice as many goldfish as he did tetras. Each goldfish costs $1.50, and each tetra fish costs $2.00. He spent $20 on the fish. Which system can be used to represent x, the number of tetra fish, and y, the number of goldfish, he purchased?

Answer 1

1.50y(2)+2.00x=20

Now use the quadratic formula to solve 

Answer 2

Answer:

2x = y

2x + 1.5y = 20

Step-by-step explanation:

x represents the number of tetra fish

y represents the number of goldfish

Rick bought twice as many goldfish as he did tetra so multiply 2 by the number of tetra fish to get the number of goldfish or 2x = y

Tetra fish cost $2.00 each

Goldfish cost $1.50 each

Rick spent $20 on fish so $2 multiplied by number of tetra fish + $1.50 multiplied by number of goldfish will equal $20 (total spent on fish) or

2x + 1.5y = 20