A metalworker has a metal alloy that is 25% copper and another allot that is 75% copper. How many kilograms of each alloy should the metalworker combine to create 90kg of 55% copper alloy? The metalworker should use kilograms of the metal alloy that is 25% copper and kilograms of the metal alloy that is 75% copper.

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

Which of the functions below could have created this graph?

Use the irregular polygon below. show all work. a. find the perimeter. b. find the area. the angles of the irregular polygon is 2, 8, 8, and 4.