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andrey2020 [161]
3 years ago
11

HELP :/ At the local pet store, Bloodfin Tetra cost $1.50 each and Angelfish cost $4.75 each. If Sarah bought 8 fish for a total

cost of $21.75, not including tax, how many of each type of fish did she buy?
Mathematics
1 answer:
kodGreya [7K]3 years ago
5 0

Answer:

Sarah bough 3 Angelfish and 5 Bloodfin Tetra

Step-by-step explanation:

Let a be the number of Angelfish fish and

b be the number of Bloodfin fish

Then according to the given statements

we get the following equations

a+b = 8\ \ \ Eqn\ 1\\4.75a+1.50b=21.75\ \ \ Eqn\ 2

From Equation 1

a = 8-b

Putting in equation 2

4.75(8-b)+1.50b = 21.75\\38-4.75b+1.50b = 21.75\\38-3.25b = 21.75\\-3.25b = 21.75-38\\-3.25b = -16.25\\\frac{-3.25b}{-3.25} = \frac{-16.25}{-3.25}\\b = 5

Putting b=5 in equation 1

a+5 = 8\\a = 8-5 = 3

Hence,

Sarah bough 3 Angelfish and 5 Bloodfin Tetra

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