All the pupils participating in the school play either are actors and actresses or stage- hands working behind the scenes. 30% of the scholars are working as stagehands.
35 scholars are actors and actresses.

probability for j is 1/4

while

a is 1/6

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis:

so the possibilities of the measurement of the side of the triangle are either it is longest side or not the longest side

when it is the longest side

s < 25 + 35s < 60

if it is not the longest side

35 < 25 + s10 < sso 10 < s < 60so the perimeter70 < p < 130