Answer:
80 ft x 40 ft
Step-by-step explanation:
Let 'L' be the length of the longer side and 'W' be the length of the shorter side (or the width).
The equations that compose the linear system are:

Solving the system:

The garden is a rectangle with dimensions 80 ft x 40 ft.
A = cost of 1 drink $12.75 + 4a $12.75 + $12.00 = $24.75
25
Square root of 25 is 5
Answer:

Step-by-step explanation:

Move 3k to left hand side and change it's sign
Similarly, move 4.5 to right hand side and change it's sign

Collect like terms

Subtract 4.5 from 18

Divide both sides by 4.5

Calculate

Hope I helped!
Best regards! :D