4+(27-12•2)/2
the answer is 5.5 but can someone explain it

Yes sure ! We follow the order of operation ( PEMDAS ) :

4+(27-12•2)/2

4+(27 - 24 ) /2

4+ 3/2

8/2 + 3/2 = 11/2

Following the order of operation , we first start with the parenthes , inside the parenthesis we have multiplication and subtraction . We start with multiplication , and then we subtract ... and do same denominator ..

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.