You always do PEMDAS (parentheses, exponents, multiplication, division, addition, and then subtraction) *in order* so since multiplying is before adding you do 4 times 2 which equals 8 and then you add 3, so 8+3=11 hope this helped
0.4 is and that simplified is because you take the GCF or Greatest Common Factor, which is two, and divide both parts of the fraction taking and turning it into
and that simplified is 
because you take the GCF or Greatest Common Factor, which is two, and divide both parts of the fraction taking