Amanda bought 4 shirts and 9 skirts for $168.75. on another day she bought 3 shirts and 12 skirts for $172.50. how much did she pay for 1
shirt and 1 skirt?

shirt = $22.5

skirt= $8.75

Step-by-step explanation:

Let shirt be x and skirt be y

4x + 9y = 168.751

3x + 12y = 172.52

Using elimination method

Multiply eqn 1 by 3 and eqn 2 by 4

12x + 27y= 506.25

12x + 48y = 690

Subtracting

-21y = -183.75

y = $8.75

Put in eqn 1

4x + 9×8.75 = 168.75

4x = 168.75 - 78.75

4x = 90

x = $22.5

it is b)

hope this : )

step-by-step explanation: