exam Maths Puzzle Numerical Ability

The cost in dollars of manufacturing w wing nuts is given by the expression 0.07w + 13.3. Find the cost when 375 wing nuts are made. What is the the average cost to manufacture one wing nut?

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exam Other Question
(4x^3-2x^2+x-1) / (x+2) a ladder is resting against a wall. the top of the ladder touches the wall at the height of 18 ft. find the length of the ladder if the length is 6 ft more than its distance from the wall