At-shirt shop charges $15 for an adult shirt and $12 for a youth shirt. the total charge for a shirt order was $489. which equation can be used to represent x, the number of adult shirts sold and y, the number of youth shirts sold?

Step-by-step explanation:

For the Equation to be accurate you need to calculate the amount of adult shirts and youth shirts sold and multiply those numbers by their corresponding prices. Since both of these values are unknown we would need an Algebraic Equation with two variables like the following.

Where x is the number of adult shirts sold and y is the number of youth shirts sold.

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56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6