Second-year 69854

There are p first-year students in the school. There are 18% fewer sophomores than first-year students. There are 7 more third graders than sophomores and twice as many fourth graders as first- and second-year students combined. Express the number of pupils in the 1st grade.

Correct answer:

x = 6.28p + 7

Step-by-step explanation:

r=100%18%=110018=0.82  x = p + r p + (7+r p) + 2 (p+r p)  k=1+r 1+r 1+2 (1+r 1)=1+0.82 1+0.82 1+2 (1+0.82 1)=25157=6257=6.28 x= k p+7 x=6.28p+7

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