Two figures are arranged as shown. Which 1 expression could be used to find the area of the light grey shaded section? * A. 9² - x² Х B. (9 - x) 9² C. 2(9) + 2(9 - x) D. 9² + x² E. x(9-x) + 9(9 - x)​

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

What is the celsius temperature that is equal to 94 degrees fahrenheit using the formula f=9/5 c+32