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Evaluate the expression for the given value of the variable 7a - 4a for a =8

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.