Choose the correct proportion. 5 is to 19 as x is to 250 a. 19/5 = 250/x b. 19/5 = x/250 c. 5/19 = x/250 d. 5/19 = 250/x

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

Which of the following parabolas opens down?

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )