Select the correct answer. During the summer, Jody earns $10 per hour babysitting and $15 per hour doing yardwork. This week she
worked 34 hours and earned $410. If x represents the number hours she babysat and y represents the number of hours she did yardwork, which system of equations models this situation? A. x + y = 34 10x + 15y = 410 B. x + y = 410 10x + 15y = 34 C. x + y = 34 15x + 10y = 410 D. x + y = 410 15x + 10y = 34
SinB = cosC = AC / BC = 8/10 = 4/5; tgB = ctg C = AC/AB = 8/6 = 4/3, because we use T. Pitagora for calculating AB; sinC = cosB = AB/ BC = 6/10 = 3/5; tgC = ctgB = AB/ AC = 6/8 = 3/4.
