Ianna buys a book for $12 and a poster for $15. Posters are on sale for 20% off. Sales tax is 9%. Which expression will calculate the cost of Gianna’s purchase?
12 + 15 - 0.80 + 1.09
12 + 15(0.80)(1.09)
(12 + 15)(0.80)(1.09)
(12 + 15 ● 0.80)(1.09)

What two criteria are needed for triangles to be similar

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m

How to simply and write the answer n a whole number