What is the equation, in point-slope form, of the line passing through the point (5, -3) with a slope of 1/7? y + 3 = (x - 5)
y - 3 = (x + 5)
y - 3 = 7(x + 5)
y + 3 = 7(x - 5)

Which of the following expressions are equivalent ?

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ac=26 and ch=8, find bh.