You read online that a 15 ft x 20 ft brick patio would cost about $2,275 to have professionally installed. estimate the cost of having a 23 ft x 27 ft.

4500 to 4750

Step-by-step explanation:

2275/300 ≈ 7.5 7.5•621 ≈ 4650

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option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,