3pairs of pants are $18. how much will the dry cleaner charge for 11 pairs of pants

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.