Podem me ajudar com essa questão? Encontre a distância entre a reta r: 5x - 8y = 20 e o centro da circunferência C de equação x² + y² - 16x - 10y + 80 = 0 Por favor, com o rascunho

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?

Question 101 points)which equation in slope-intercept form represents the line that passes through (5, 1) and(-4,7)

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits