Calvin goes shopping over the weekend and buys a new pair of shoes,a T-Shirt, a pair of sunglasses, and a hat that costs $9. The shoes are twice as much as the shirt, and the sunglasses are half as much as the shirt. The total cost of his purchase is $65. How much does each cost?

Respuesta :

Answer:

  • shoes: $32
  • t-shirt: $16
  • sunglasses: $8
  • hat: $9

Step-by-step explanation:

Let the costs of shoes, t-shirt, and glasses be represented by s, t, g, respectively. The problem statement tells us these relationships:

... s = 2t

... g = t/2

... s +t +g +9 = 65 . . . . . the $9 cost of the hat is added into the total

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Solution

Substituting for s and g, we have ...

... 2t +t +t/2 +9 = 65

... (3 1/2)t = 56 . . . . . collect terms

... t = 56/3.5 = 16 . . . . divide by the coefficient of t

The shoes are 2t, so $32.

The t-shirt is t, so $16.

The sunglasses are t/2, so $8.

The hat is $9.