There are 210 7th graders at King Middle School. At the end of the first semester, a random sample of the report cards for 30 King 7th graders was examined, and 8 of the students in the sample had an A in math. Based on the results from the sample, about how many 7th graders at King Middle School would be expected to have an A in math on their first semester report cards?

What expression is equivalent to 42x-56y

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

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%