The expression 1 2 b h 2 1 bhstart fraction, 1, divided by, 2, end fraction, b, h gives the area of a triangle where b bb is the base of the triangle and h hh is the height of the triangle. What is the area of a triangle with a base of 7 cm 7 cm7, start text, space, c, m, end text and a height of 4 cm 4 cm4, start text, space, c, m, end text?

Two spray paint machines are used to paint different portions of a large wall. the first machine (nicknamed "paint pro") is used for two hours. the second machine (nicknamed "goldilocks") is used for an hour and a half. when they are working at the same time, they can paint 55 square feet per minute. together they painted 5850 square feet of wall. how many square feet of wall per minute can each machine paint? e used to paint different portions of a large wall. the first machine (nicknamed "paint pro") is used for two hours. the second machine (nicknamed "goldilocks") is used for an hour and a half. when they are working at the same time, they can paint 55 square feet per minute. together they painted 5850 square feet of wall. how many square feet of wall per minute can each machine paint?