SOLUTION: 2. In a school 1/10 of the students had French as optional language. Of these 1/3 were girls, if 80 boys studied French what is the total number of students in the school? 3.

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: 2. In a school 1/10 of the students had French as optional language. Of these 1/3 were girls, if 80 boys studied French what is the total number of students in the school? 3.       Log On


   

Question 798559: 2. In a school 1/10 of the students had French as optional language. Of these 1/3 were girls, if 80 boys studied French what is the total number of students in the school?
3. Find the product using suitable property: 28*(-73)+(-78)*22
Answer by Finavon(81) About Me  (Show Source):
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2) N total in school
80+=+%281%2F10%29+%2A+%282%2F3%29+%2AN
N+=+800%2A3%2F2=1200
1200 pupils
120 study French (40 girls+80 boys)

3)-28*73=-2044
-78*22=-1716
Add= -3760