in a coordinate plane, a line has two points a and b with the coordinates a(4,n) and b(10,6n). in the same coordinate plane, a different line has two points c and d with coordinates c(-3,-6) and d(9,8n). for what value of n are the two lines parallel?

n = ?

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

The probability that a college student belongs to a health club is 0.3. the probability that a college student lives off-campus is 0.4. the probability that a college student belongs to a health club and lives off-campus is 0.12. find the probability that a college student belongs to a health club or lives off-campus. tip: p(a or b) = p(a) + p(b) - p(a and b) 0.54 0.58 0.70 0.82

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?