Evelyn gave the cashier $25 to pay for 3 t-shirts. The cashier gave her $4.24 in change. Each t-shirt cost the same amount. What was the cost in dollars and cents of one t-shirt? pls answer!

9514 1404 393

  $6.92

Step-by-step explanation:

Let t represent the price of a shirt. Then the transaction can be modeled by ...

  3t = 25.00 -4.24 . . . . the amount tendered, less the change

  t = 20.76/3 = 6.92 . . . divide by 3

The cost of one t-shirt was $6.92.

answer: $34.31

step-by-step explanation:

$11.99 x 3 = $35.97

$35.97 - 10% = $32.37

$32.37 + 6% = $34.31

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204