If the sin 0° = 0, then which statement is true?
select one:
a. cos 90° = 1, because the cosine and sine are complements
b. cos 180° = 1, because the cosine and sine are supplements
c. cos 90° = 0, because the cosine and sine are complements
d. cos 180° = 0, because the cosine and sine are supplements

Δabc is reflected across line l to form δ alblcl, and a¯¯¯al¯¯¯¯ intersects line l at point d. which equation is not necessarily true?

Two language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?