Which of the following lines are perpendicular to the line y=-1/2+4? you may choose more than one answer. • 2x - y = 1
• y = 2x
• 2x + y = 1
• 1/2x - y = 3
• 2x - y = 3

will mark brainliest whoever answers :)

One integer is 5 more than another. their product is 104. find the integers

Someone answer this asap rn for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.