How many ways are there to select 7 countries in the united nations to serve on a council if 1 is selected from a block of 56, 3 are selected from a block of 63 and 3 are selected from the remaining 70 countries?

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.