What is the first quartile of the following data set? 14, 15, 18, 20, 21, 23, 24, 26, 29, 34, 37

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Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

Use the x-intercept method to find all real solutions of the equation. -9x^3-7x^2-96x+36=3x^3+x^2-3x+8

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.