Linear systems word problem:

astrid is running a concession stand at a basketball game. she is selling hot dogs and sodas. each hot dog costs $1.50 and each soda costs $0.50. at the end of the night she made a total of $78.50. she sold a total of 87 hot dogs and sodas combined. she must report the number of hot dogs sold and the number of sodas sold. how many hot dogs were sold and how many sodas were sold?

Apackage of bacon holds 15 strips of bacon. the pancake house uses 17 packages of bacon in the morning and 21 packages in the afternoon. how many more strips were used in the afternoon than the morning?

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.

D(5, 7). e(4,3), and f(8, 2) form the vertices of a triangle. what is mzdef? oa. 30° ob. 45° oc. 60° od 90°