a random sample of students from the seventh and eighth grades are asked whether they walk to school. the results of this survey are shown in the table.

student grade walks
1 7 y
2 7 n
3 8 n
4 8 n
5 8 n
6 7 y
7 8 y
8 8 n
9 7 n
10 7 n
walk to school?

yes no
grade 7
grade 8

    Yes    No

Grade 7       2     3

Grade 8       1      4

Step-by-step explanation:

Given: A random sample of students from the seventh and eighth grades are asked whether they walk to school.

From the given table, the number of grade 7 students said Yes ( see 7Y) = 2

The number of grade 7 students said No (see 7 N) =3

The number of students of grade said Yes (see 8 Y)=1

The number of students of grade 8 said No (see 8 N)=4

Hence, the next table becomes

                  Yes    No

Grade 7       2       3

Grade 8       1       4

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)

the answer is z7+8/5