For each equation below, determine whether the number shown in bold is a solution to the equation. if the number is not a solution, then find the solution. show your work.
a. x + 17 = -3; -20 b. y - 12 = 14; 10
part i: plug each answer into the equation for the variable. (2 points; 1 point each)

part ii: perform the calculation on the left side of the equation. (2 points; 1 point each)

part iii: determine if the number given is a correct solution. if the number is not a solution, find the correct solution. (4 points; 2 points each)

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

How do you solve a question like this?

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)) =