Split 18 into the ratio 1:2

6 : 12

Step-by-step explanation:

sum the parts of the ratio, 1 + 2 = 3 parts

Divide by 3 to find the value of one part of the ratio

18 ÷ 3 = 6 ← value of 1 part of the ratio, thus

2 parts = 2 × 6 = 12

1 : 2 = 6 : 12

is means division by fractions

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.