S varies inversely as G if S is 5 when G is 2.8 find a when G is 7

The correct answer is (d) S = K/G and the value of S when G = 3 is 4.2

Given that, S varies inversely as G.

S ∝ 1 / G

S = K / G , here K is constant of proportionality

When G = 1.8 then S = 7, putting these values in the above equation:

 7 = K / 1.8

K = 12.6

⇒ S = 12.6 / G

Now, if G =3 then

  S = 12.6 / 3 = 4.2 is the answer.

Step-by-step explanation:

it's d.

step-by-step explanation:

because: -1(4x + 1y) +2 (1x-3y) distribute each number into the parenthesis.

then you would get: -4x - 1y + 2x -6y combine like terms

and get: 2x -7y

hope my answer has you if not then i'm sorry.

the answer would be 0.54