A school survey found that 7 out of 30 students walk to school. If two students are selected at random without
replacement, what is the probability that both students
walk to school?
49/90

49/900

7/30

7/145

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

What is the result of adding the system of equations? 2x+y=4 3x-y=6