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Sal is tiling his entryway. the floor plan is drawn on a unit grid. each unit length represents 1 foot. tile costs $1.35 per square foot. how much will sal pay to tile his entryway? round your answer to the nearest cent.

If on=8x-8,lm=7x+4,nm=x-5,and ol=3y-6

Gabrielle's age is three times mikhail's age. the sum of their ages is 40 . what is mikhail's age? __ years old