b. astronomers

b

step-by-step explanation:

b

The cost of blueberry pies is $7 and the cost of pumpkin pie is $16.

Step-by-step explanation:

Let the number of blueberry pies be x

Let the number of pumpkin pies be y

According to question, we have

Bring the value of 6x from eq(2) i.e.

And put it in the eq(1), we get,

and put the value of y in the equation i.e.

Hence, the cost of blueberry pies is $7 and the cost of pumpkin pie is $16.

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