All five digits are different none of the five digits are 1 the digit in the ten thousand place is greater than 7 the sum of all five digits is 18 the greatest digit is equal to the sum of the other four digits

Which shows the pre image of triangle xyz

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?