If a line has a slope of 3, what is the slope of a line perpendicular to it?

Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.