Evaluate the expression? (15+6) divided by 3 ?

here u go

Step-by-step explanation:

=(15+6)/3

=21/3

=7

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.