The sum of Mr. Hackett and his wife's age is 97. Mr. Hackett's age is 40 more than half his wife's age. How old are they?

What is the efficiency of a machine that produces 4500 joules of output work for every 4250 joules of input work? (remember to put it in correct units and round to the hundredths place)

Which of the following expressions is the inverse of the function y equals quantity x minus 2 divided by 3? y = 3x + 2 y = 2x + 3 y equals quantity x minus 3 divided by 2 y equals quantity x plus 2 divided by 3

How do you find the answer to the dimensions of a square

What is the most precise name for quadrilateral ABCD with vertices A (-5, - 1), B (-5, 3), C (-2, 3), and D (-2, - 1) ?

A square garden has a side length that is 3 meters shorter than the length

An=-31 + (n-1) - 11 find the eleventh term

Brian works in the lab and feels an empty cylindrical flask with 200 cubic centimeters of liquid. The flask has a radius of 3 cm and a height of 12 cm. What percent of the volume of the flask is not filled with liquid?

436% of what number is 31.61

If you have zero cookies and share them amongst zero friends, how would you write the equation and solve it?

What is the interior angle sum of a 15-gon?