1.what is the cross section formed by a plane that contains a vertical line of symmetry for a tetrahedron?
a. triangle
b. square
c. rectangle
d. pentagon
5. what is the cross section formed by a plane that intersects three faces of a cube?
a. triangle
b. square
c. rectangle
d. pentagon

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

The reflexive property of congruence lets you say that ∠pqr ≅

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)) =