Parallel lines and m are intersected by lines and . The diagram below shows the lines and the measures of some of the angles formed by the intersections of the
lines.
Lines , , and intersect at point . Based on the diagram, what is the value of ?
A. 40
B. 50
C. 60
D. 80

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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?

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no