Em um triângulo ABC o vértice A tem coordenadas (2, -1) e a reta suporte do lado BC tem equação x + 2y + 20 = 0. Nessas condições a altura relativa ao lado BC é: a) 4√3
b) √5
c) 4√2
d) 2√5
e) 4√5

How can we find the measure of an exterior angle if we know the measurement of an interior angle

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.