For every 6kg of a child's weight, pediatricians prescribe 7mg of fever reducer. If Greg weighs 42kg, how many milligrams of the fever reducer will the pediatrician prescribe?

49mg

Step-by-step explanation:

lets consider 6kg as x for a second. First we need to find how many x's are in 42kg. 6kg=1x so to find the correct amount of x's we need to divide 42 by 6. You would get 7. Multiply 7 by the 7mg and yo would get 49. This is what it would look like with working:

6kg=x or 1x

42/6=7

Now we have 7x's

7x7=49                    

49mg

40% off the regular price is the correct answer.

step-by-step explanation: