In a class,60% of the students are girls. there are 18 girls in the class. how many students are in the class. how many boys are in the class

There are 30 students in the class in total. there are 12 boys.

Step-by-step explanation:

since there is 30 Students in total, that means that there must be 12 boys since:

18 + 12 = 30

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

what is the graph

step-by-step explanation: