IF (-20, -39) is a solution to y = 2x + 1 which statement is TRUE. a.
(-20, -39) is solution because

When I graphed the line, y = 2x + 1, the point (-20, -40) lies on that line. In addition, when I plugged in -20 for x and -39 for y and the equation was true!

b.
(-20, -39) is a solution because

there an infinite number of points on a line and ALL points lie on y = 2x + 1.

c.
Don't know what to do!

d.

True. (-20, -39) is NOT a solution.

I couldn't graph the point (-20, -39) on the provided coordinate plane.

Someone answer asap 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)) =